Propylene Production by Propane Dehydrogenation (PDH)Amir Razmi
In this article a description about different processes which are commercialized to produce propylene via Propane dehydrogenation were presented.
To receive more reports about cost estimation analysis and other reports (about the propylene and PDH ) contact the author.
This is great Presentation with 3D effects which is all about production of ammonia from natural gas.
I am damn sure you will be getting everything here searching for.
its better to download it and then run in powerpoint 2013.
Course by Chemical Engineering Guy
Check out full course:
http://www.chemicalengineeringguy.com/courses/aspen-plus-physical-properties-course/
Ask me for special discounts, or checkout "SURPIRSE" tab in my site for special discounts.
This is course on Process Simulation will show you how to model, manipulate and report thermodynamic, transport, physical and chemical properties of substances.
You will learn about:
Physical Property Environment
Physical Property Method & Method Assistant
Fluid and Property Packages
Physical property input, modeling, estimation and regression
Thermodynamic Properties (Material/Energy balances and Thermodynamic Processes)
Transport Properties for (Mass/Heat/Momentum Transfer)
Equilibrium Properties (Vapor-Liquid, Liquid-Liquid, etc...)
Getting Results (Plots, Graphs, Tables)
This is an excellent way to get started with Aspen Plus. Understanding the physical property environment will definitively help you in the simulation and flowsheet creation!
This is a "workshop-based" course, there is about 50% theory and about 50% practice!
This is course on Plant Simulation will show you how to setup hypothetical compounds, oil assays, blends, and petroleum characterization using the Oil Manager of Aspen HYSYS.
You will learn about:
Hypothetical Compounds (Hypos)
Estimation of hypo compound data
Models via Chemical Structure UNIFAC Component Builder
Basis conversion/cloning of existing components
Input of Petroleum Assay and Crude Oils
Typical Bulk Properties (Molar Weight, Density, Viscosity)
Distillation curves such as TBP (Total Boiling Point)
ASTM (D86, D1160, D86-D1160, D2887)
Chromatography
Light End
Oil Characterization
Using the Petroleum Assay Manager or the Oil Manager
Importing Assays: Existing Database
Creating Assays: Manually / Model
Cutting: Pseudocomponent generation
Blending of crude oils
Installing oils into Aspen HYSYS flowsheets
Getting Results (Plots, Graphs, Tables)
Property and Composition Tables
Distribution Plot (Off Gas, Light Short Run, Naphtha, Kerosene, Light Diesel, Heavy Diesel, Gasoil, Residue)
Oil Properties
Proper
Boiling Point Curves
Viscosity, Density, Molecular Weight Curves
This is helpful for students, teachers, engineers and researchers in the area of R&D, specially those in the Oil and Gas or Petroleum Refining industry.
This is a "workshop-based" course, there is about 25% theory and about 75% work!
At the end of the course you will be able to handle crude oils for your fractionation, refining, petrochemical process simulations!
Propylene Production by Propane Dehydrogenation (PDH)Amir Razmi
In this article a description about different processes which are commercialized to produce propylene via Propane dehydrogenation were presented.
To receive more reports about cost estimation analysis and other reports (about the propylene and PDH ) contact the author.
This is great Presentation with 3D effects which is all about production of ammonia from natural gas.
I am damn sure you will be getting everything here searching for.
its better to download it and then run in powerpoint 2013.
Course by Chemical Engineering Guy
Check out full course:
http://www.chemicalengineeringguy.com/courses/aspen-plus-physical-properties-course/
Ask me for special discounts, or checkout "SURPIRSE" tab in my site for special discounts.
This is course on Process Simulation will show you how to model, manipulate and report thermodynamic, transport, physical and chemical properties of substances.
You will learn about:
Physical Property Environment
Physical Property Method & Method Assistant
Fluid and Property Packages
Physical property input, modeling, estimation and regression
Thermodynamic Properties (Material/Energy balances and Thermodynamic Processes)
Transport Properties for (Mass/Heat/Momentum Transfer)
Equilibrium Properties (Vapor-Liquid, Liquid-Liquid, etc...)
Getting Results (Plots, Graphs, Tables)
This is an excellent way to get started with Aspen Plus. Understanding the physical property environment will definitively help you in the simulation and flowsheet creation!
This is a "workshop-based" course, there is about 50% theory and about 50% practice!
This is course on Plant Simulation will show you how to setup hypothetical compounds, oil assays, blends, and petroleum characterization using the Oil Manager of Aspen HYSYS.
You will learn about:
Hypothetical Compounds (Hypos)
Estimation of hypo compound data
Models via Chemical Structure UNIFAC Component Builder
Basis conversion/cloning of existing components
Input of Petroleum Assay and Crude Oils
Typical Bulk Properties (Molar Weight, Density, Viscosity)
Distillation curves such as TBP (Total Boiling Point)
ASTM (D86, D1160, D86-D1160, D2887)
Chromatography
Light End
Oil Characterization
Using the Petroleum Assay Manager or the Oil Manager
Importing Assays: Existing Database
Creating Assays: Manually / Model
Cutting: Pseudocomponent generation
Blending of crude oils
Installing oils into Aspen HYSYS flowsheets
Getting Results (Plots, Graphs, Tables)
Property and Composition Tables
Distribution Plot (Off Gas, Light Short Run, Naphtha, Kerosene, Light Diesel, Heavy Diesel, Gasoil, Residue)
Oil Properties
Proper
Boiling Point Curves
Viscosity, Density, Molecular Weight Curves
This is helpful for students, teachers, engineers and researchers in the area of R&D, specially those in the Oil and Gas or Petroleum Refining industry.
This is a "workshop-based" course, there is about 25% theory and about 75% work!
At the end of the course you will be able to handle crude oils for your fractionation, refining, petrochemical process simulations!
Hydrogen recovery from purge gas(energy saving)Prem Baboo
Ammonia is continuously condensed out of the loop and fresh synthesis gas is added. Because the synthesis gas contains small quantities of methane and argon, these impurities build up in the loop and must be continuously purged to prevent them from exceeding a certain concentration. Although this purge stream can be used to supplement reformer fuel gas, it contains valuable hydrogen which is lost from the ammonia synthesis loop In order to achieve optimum conversion in synthesis convertor, it is necessary to purge a certain quantity of gas from synthesis loop so as to as to reduce inerts concentration in the loop. Purge gas stream from ammonia process contains ammonia, hydrogen, nitrogen and other inert gases. Among them, ammonia itself is the valuable product lost with the purge stream. Moreover it has a serious adverse effect on the environment.This purge gas containing about 60% Hydrogen was fully utilised as primary reformer fuel.
The Preliminary Choice of Fan or Compressor
0 INTRODUCTION/PURPOSE
1 SCOPE
2 FIELD OF APPLICATION
3 DEFINITIONS
4 METHOD FOR PRELIMINARY SELECTION
OF COMPRESSOR
5 PROCESS DATA SHEET
5.1 Essential Data for the Completion of a
Process Data Sheet
5.2 Gas Properties
5.3 Discharge Requirements
6 PRELIMINARY CHOICE OF FAN AND
COMPRESSOR TYPE
6.1 Essential Data for Preliminary Selection
7 FAN AND COMPRESSOR APPLICATIONS
7.1 Fans
7.2 Centrifugal Compressors
7.3 Axial Compressors
7.4 Reciprocating Compressors
7.5 Screw Compressors
7.6 Positive Displacement Blowers
7.7 Sliding Vane Compressors
7.8 Liquid Ring Compressors
8 PROVISION OF INSTALLED SPARES
9 PRELIMINARY ESTIMATE OF COSTS
In petroleum refining, the Crude Distillation Unit (CDU) (often referred to as the Atmospheric Distillation Unit) is usually the first processing equipment through which crude oil is fed. Once in the CDU, crude oil is distilled into various products, like naphtha, kerosene, and diesel, that then serve as feedstocks for all other processing units at the refinery.
COURSE LINK:
https://www.chemicalengineeringguy.com/courses/petrochemicals-an-overview/
Introduction:
The course is mainly about the petrochemical industry. Talks about several chemicals and their chemical routes in order to produce in mass scale the demands of the market.
Learn about:
Petorchemical Industry
Difference between Petroleum Refining vs. Petrochemical Industry
Paraffins, Olefins, Napthenes & Aromatics
Market insight (production, consumption, prices)
Two main Petrochemical Processes: Naphtha Steam Cracking and Fluid Catalytic Cracking
The most important grouping in petrochemical products
Petrochemical physical & chemical properties. Chemical structure, naming, uses, production, etc.
Basic Gases in the industry: Ammonia, Syngas, etc…
C1 Cuts: Methane, Formaldehyde, Methanol, Formic Acid, Urea, Chloromethanes etc…
C2 Cuts: Ethane, Acetylene, Ethylene, Ethylene Dichloride, Vinyl Chloride, Ethylene Oxide, Ethanolamines, Ethanol, Acetaldehyde, Acetic Acid, Ethylene Glycols (MEG, DEG, TEG)
C3 Cuts: Propane, Propylene, Propylene Oxide, Isopropanol, Acetone, Acrylonitrile, Propediene, Allyl chloride, Acrylic acid, Propionic Acid, Propionaldehyde, Propylene Glycol
C4 Cuts: Butanes, Butylenes, Butadiene, Butanols, MTBE (Methyl Tert Butyl Ethers)
C5 cuts: Isoprene, Pentanes, Piperylene, Cyclopentadiene, Dicyclopentadiene, Isoamyl, etc…
Aromatics: Benzene, Toluene, Xylenes (BTX), Cumene, Phenol, Ethyl Benzene, Styrene, Pthalic Anhydride, Nitrobenzene, Aniline, Benzoic Acid, Chlorobenzene, etc…
At the end of the course you will feel confident in how the petrochemical industry is established. You will know the most common petrochemicals as well as their distribution, production and importance in daily life. It will help in your future process simulations by knowing the common and economical chemical pathways.
VULCAN Series VSG-Z101 Primary Reforming
Initial Catalyst Reduction
Activating (reducing) the catalyst involves changing the nickel oxide to nickel, represented by:
NiO + H2 <==========> Ni + H2O
Natural gas is typically used as the hydrogen source. When it is, the catalyst reduction and putting the reformer on-line are accompanied in the same step.
Conference for Catalysis Webinar 2021: "The Key Role of Catalysts and Adsorb...Dr. Meritxell Vila
Energy transition is a challenge for refineries and petrochemical plants. In this sense, the role of catalysts and adsorbents will be crucial in three areas:
New schemes of refineries: crude oil to chemicals (COTC)
Production of biofuels
Production of green hydrogen
This presentation was done at Catalysis Webinar 2021, the 24th March.
Boiler Efficiency Calculation by Direct & Indirect MethodTahoor Alam Khan
This PPT explains detailed calculations in Boiler Efficiency calculations through direct and indirect method. It also explains pros and cons of boiler efficiency calculation through direct and indirect method. For further clarifications you can reach out to me at tahoorkhn03@gmail.com or connect with me on my linkedin profile by clicking at www.linkedin.com/in/tahoorkhan
Hydrogen recovery from purge gas(energy saving)Prem Baboo
Ammonia is continuously condensed out of the loop and fresh synthesis gas is added. Because the synthesis gas contains small quantities of methane and argon, these impurities build up in the loop and must be continuously purged to prevent them from exceeding a certain concentration. Although this purge stream can be used to supplement reformer fuel gas, it contains valuable hydrogen which is lost from the ammonia synthesis loop In order to achieve optimum conversion in synthesis convertor, it is necessary to purge a certain quantity of gas from synthesis loop so as to as to reduce inerts concentration in the loop. Purge gas stream from ammonia process contains ammonia, hydrogen, nitrogen and other inert gases. Among them, ammonia itself is the valuable product lost with the purge stream. Moreover it has a serious adverse effect on the environment.This purge gas containing about 60% Hydrogen was fully utilised as primary reformer fuel.
The Preliminary Choice of Fan or Compressor
0 INTRODUCTION/PURPOSE
1 SCOPE
2 FIELD OF APPLICATION
3 DEFINITIONS
4 METHOD FOR PRELIMINARY SELECTION
OF COMPRESSOR
5 PROCESS DATA SHEET
5.1 Essential Data for the Completion of a
Process Data Sheet
5.2 Gas Properties
5.3 Discharge Requirements
6 PRELIMINARY CHOICE OF FAN AND
COMPRESSOR TYPE
6.1 Essential Data for Preliminary Selection
7 FAN AND COMPRESSOR APPLICATIONS
7.1 Fans
7.2 Centrifugal Compressors
7.3 Axial Compressors
7.4 Reciprocating Compressors
7.5 Screw Compressors
7.6 Positive Displacement Blowers
7.7 Sliding Vane Compressors
7.8 Liquid Ring Compressors
8 PROVISION OF INSTALLED SPARES
9 PRELIMINARY ESTIMATE OF COSTS
In petroleum refining, the Crude Distillation Unit (CDU) (often referred to as the Atmospheric Distillation Unit) is usually the first processing equipment through which crude oil is fed. Once in the CDU, crude oil is distilled into various products, like naphtha, kerosene, and diesel, that then serve as feedstocks for all other processing units at the refinery.
COURSE LINK:
https://www.chemicalengineeringguy.com/courses/petrochemicals-an-overview/
Introduction:
The course is mainly about the petrochemical industry. Talks about several chemicals and their chemical routes in order to produce in mass scale the demands of the market.
Learn about:
Petorchemical Industry
Difference between Petroleum Refining vs. Petrochemical Industry
Paraffins, Olefins, Napthenes & Aromatics
Market insight (production, consumption, prices)
Two main Petrochemical Processes: Naphtha Steam Cracking and Fluid Catalytic Cracking
The most important grouping in petrochemical products
Petrochemical physical & chemical properties. Chemical structure, naming, uses, production, etc.
Basic Gases in the industry: Ammonia, Syngas, etc…
C1 Cuts: Methane, Formaldehyde, Methanol, Formic Acid, Urea, Chloromethanes etc…
C2 Cuts: Ethane, Acetylene, Ethylene, Ethylene Dichloride, Vinyl Chloride, Ethylene Oxide, Ethanolamines, Ethanol, Acetaldehyde, Acetic Acid, Ethylene Glycols (MEG, DEG, TEG)
C3 Cuts: Propane, Propylene, Propylene Oxide, Isopropanol, Acetone, Acrylonitrile, Propediene, Allyl chloride, Acrylic acid, Propionic Acid, Propionaldehyde, Propylene Glycol
C4 Cuts: Butanes, Butylenes, Butadiene, Butanols, MTBE (Methyl Tert Butyl Ethers)
C5 cuts: Isoprene, Pentanes, Piperylene, Cyclopentadiene, Dicyclopentadiene, Isoamyl, etc…
Aromatics: Benzene, Toluene, Xylenes (BTX), Cumene, Phenol, Ethyl Benzene, Styrene, Pthalic Anhydride, Nitrobenzene, Aniline, Benzoic Acid, Chlorobenzene, etc…
At the end of the course you will feel confident in how the petrochemical industry is established. You will know the most common petrochemicals as well as their distribution, production and importance in daily life. It will help in your future process simulations by knowing the common and economical chemical pathways.
VULCAN Series VSG-Z101 Primary Reforming
Initial Catalyst Reduction
Activating (reducing) the catalyst involves changing the nickel oxide to nickel, represented by:
NiO + H2 <==========> Ni + H2O
Natural gas is typically used as the hydrogen source. When it is, the catalyst reduction and putting the reformer on-line are accompanied in the same step.
Conference for Catalysis Webinar 2021: "The Key Role of Catalysts and Adsorb...Dr. Meritxell Vila
Energy transition is a challenge for refineries and petrochemical plants. In this sense, the role of catalysts and adsorbents will be crucial in three areas:
New schemes of refineries: crude oil to chemicals (COTC)
Production of biofuels
Production of green hydrogen
This presentation was done at Catalysis Webinar 2021, the 24th March.
Boiler Efficiency Calculation by Direct & Indirect MethodTahoor Alam Khan
This PPT explains detailed calculations in Boiler Efficiency calculations through direct and indirect method. It also explains pros and cons of boiler efficiency calculation through direct and indirect method. For further clarifications you can reach out to me at tahoorkhn03@gmail.com or connect with me on my linkedin profile by clicking at www.linkedin.com/in/tahoorkhan
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Theoretical work submitted to the Journal should be original in its motivation or modeling structure. Empirical analysis should be based on a theoretical framework and should be capable of replication. It is expected that all materials required for replication (including computer programs and data sets) should be available upon request to the authors.
STUDIES ON EXHAUST EMISSIONS OF DIESEL ENGINE WITH CERAMIC COATED COMBUSTION ...IAEME Publication
Vegetable oils and alcohols (methanol and methanol) are important substitutes for diesel fuel as they are renewable in nature. However drawbacks associated with vegetable oils (high viscosity and low volatility) and alcohols (low cetane number) call for engine with hot combustion chamber with its significance characteristics of higher operating temperature, maximum heat release, higher brake thermal efficiency (BTE) and ability to handle the lower calorific value fuel. Methanol was inducted into the engine through a variable jet carburetor, installed at the inlet manifold of the engine at different percentages of crude vegetable oil at full load operation on mass basis. Crude vegetable oil was injected at near end of compression stroke
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
3. Eng. Luca Barbagallo
: lucabarbagallo40@gmail.com
: https://it.linkedin.com/in/ing-luca-barbagallo-770b29113
L.B. was born into 8° August, 1987. He was graduated from the Department of Industrial Engineering of Catania (Italy) with
specialization in chemical engineering. He obtained the qualification of industrial engineer. He worked as a sales engineer in
the field of renewable energies, he continued his career working as an inspector of facilities for sorting and storage of natural
gas is currently an intern with the planner job in industrial production in a rubber compounds industry.
CHEMICAL ENGINEERING AND SIMULATION
4. PREFACE
CHEMICAL ENGINEERING AND SIMULATION
An overall chemical process is a complex building of different
kind of unit operations in which are allowable transformations
and separations techniques very more sophisticated. At this
point there are some important and several technologies that
try separating very complex mixture of a several types of
chemical components, such as hydrocarbons from refineries
and petrochemicals ones or by different plants of natural gas
treatments. Without forgetting biomasses treatments and
renewable resource facilities, from these are just possible
splitting gases and vapors and steams based on light
hydrocarbons, water, carbon monoxide, carbon dioxide,
methane, nitrogen and more and more others.
5. CHEMICAL ENGINEERING AND SIMULATION
We depend largely on crude, the gases associated with it and
natural gas (mainly methane) as the source of liquid fuels
(petrol, diesel) and the feedstock for the chemical industry.
Oil, and the gases associated with it, consists of a mixture of
hundreds of different hydrocarbons, containing any number
of carbon atoms from one to over a hundred. Most of these
are straight chain, saturated hydrocarbons which, except for
burning, have relatively little direct use in the chemical
industry or as fuel for cars. Thus the various fractions
obtained from the distillation of crude oil and the associated
gases have to be treated further in oil refineries to make
them useful. The most valuable fractions for the chemical
industry, and for producing petrol, are liquefied petroleum
gas (LPG), naphtha, kerosene and gas oil.
6. CHEMICAL ENGINEERING AND SIMULATION
Petrol (gasoline) contains a mixture of hydrocarbons, with 5 to
10 carbon atoms. The mixture of C5-C10 hydrocarbons
obtained directly from the distillation of crude oil contains a
high proportion of straight-chain alkanes. However, if this
mixture is used as petrol, it does serious damage to a car's
engine. Petrol containing a high proportion of straight chain
alkanes tends to ignite in the cylinder of the car engine as the
piston increases the pressure and before the cylinder reaches
the optimum position. Ideally, the mixture of petrol vapour and
air is ignited with a spark at a predetermined position of the
piston in the cylinder.
This problem of premature ignition is referred to as pre-
ignition and also as engine knock. The term knock is used as
pre-ignition can be heard. Severe knock can cause serious
engine damage. However, branched-chain alkanes,
cycloalkanes and aromatic hydrocarbons are much more
resistant to knock and straight-chain alkanes are converted into
them in a series of processes in the refinery which are
described in this unit.
7. The resistance of petrol to knock is measured in terms of an “octane rating” (octane number). The higher the number, the less likely is
a fuel to pre-ignite. The octane rating is on a scale where heptane is given an arbitrary score of 0 and 2,2,4-trimethylpentane (iso-
octane) one of 100 %.
Thus a petrol with the same knocking characteristics as a mixture of 95% 2,2,4-trimethylpentane and 5% heptane has an octane rating
of 95. A rating of 95 does not mean that the petrol contains just iso-octane and heptane in these proportions, but that it has the same
tendency to knock as this mixture. The octane rating of petrols usually available for cars range from 95 upwards and contain a mixture
of straight-chain, branched, cyclic and aromatic hydrocarbons, produced by the processes described below. These processes are also
used to convert staight-chain hydrocarbons to hydrocarbons which are much more useful to make chemicals which are then used to
make a huge range of compounds from polymers to pharmaceuticals.
CHEMICAL ENGINEERING AND SIMULATION
9. CHEMICAL ENGINEERING AND SIMULATION
An important unit operation in the chemical process industries (CPI) is to separate a mixture into its components. A typical chemical
plant, as illustrated in the schematic flow sheet of Figure 1 will consist of both reaction and separation units. The raw materials are first
purified in a separating unit and then fed to the reactor. A factor representing the efficiency with which raw materials are converted to
products is the selectivity.
This is given by moles of primary product produced divided by the moles of limiting reactant consumed. It can vary between 0 to 1,
depending on the stoichiometry, the molar feed ratio of reactants, reactor temperature(s), reactor configuration, the catalyst if required
etc. Any unreacted feed that remains is separated from the reaction products and recycled back to the reactor. The products are further
separated and purified, before being marketed or used in subsequent processes. If the products contain ‘‘non-condensable’’
components, such as methane, hydrogen, argon, these must be separated by flash separation or similar process. Before flash separation,
the process stream is usually cooled and depressurized.
Afterwards, it may be fed to another separator to remove and purify useful components. Any remaining raw materials are recycled to the
chemical process. The arrangement of Figure 1 is typical of many petrochemical processes, and is illustrated in (Hydrocarbon Processing
Magazine).
11. CHEMICAL ENGINEERING AND SIMULATION
Gas separation, in the upper side of the flow chart, will be main the object of discussion in this elaborate based on separation of light
ends gases. These go out from upper side (top) of the topping unit operation, such as atmospheric distillation. The mixture include a
mixture of C1-C4 hydrocarbons and are separated by fractional distillation systems. Some of the columns are:
1) A debutanizer which separates the C4 hydrocarbons from the C1-C3 hydrocarbons
2) A depropanizer which separates out the C3 hydrocarbons
3) A deethaniser which separates out the C2 hydrocarbons
4) A demethanizer which separates out the methane
5) A C3 splitter which separates propylene from propane
6) A C2 splitter which separates ethane from ethane.
Figure 2: Gas separation train in a refinery plant (By kind permission of SABIC
Europe.)
12. CHEMICAL ENGINEERING AND SIMULATION
In this elaborate will be pointed out the features of the C3 splitter column by using a theoretical model for a multicomponent mixture
and simulations with computational simulator as three different kind of them. They are very noted and commercial software such as
Chemcad, Aspen plus and Chemsep. The results will be compared both of them to evaluate and validate the current theoretical model
for calculating final response, more useful in designing the overall column.
13. Propylene is an unsaturated organic compound having the chemical formula C3H6. It has one double bond, is the second simplest
member of the alkene class of hydrocarbons, and is also second in natural abundance. Propylene is produced primarily as a by-product
of petroleum refining and of ethylene production by steam cracking of hydrocarbon feedstocks. Also, it can be produced in an on-
purpose reaction (for example, in propane dehydrogenation, metathesis or syngas-to-olefins plants). It is a major industrial chemical
intermediate that serves as one of the building blocks for an array of chemical and plastic products, and was also the first
petrochemical employed on an industrial scale. Commercial propylene is a colorless, low-boiling, flammable, and highly volatile gas.
Propylene is traded commercially in three grades:
Polymer Grade (PG): min. 99.5% of purity.
Chemical Grade (CG): 90-96% of purity.
Refinery Grade (RG): 50-80% of purity.
CHEMICAL ENGINEERING AND SIMULATION
Separation train of light end gases
14. CHEMICAL ENGINEERING AND SIMULATION
The three commercial grades of propylene are used for different applications. RG propylene is obtained from refinery processes. The
main uses of refinery propylene are in liquefied petroleum gas (LPG) for thermal use or as an octane-enhancing component in motor
gasoline. It can also be used in some chemical syntheses (e.g., cumene or isopropanol). The most significant market for RG propylene is
the conversion to PG or CG propylene for use in the production of polypropylene, acrylonitrile, oxo-alcohols and propylene oxide. While
CG propylene is used extensively for most chemical derivatives (e.g., oxo-alcohols, acrylonitrile, etc.), PG propylene is used in
polypropylene and propylene oxide manufacture. PG propylene contains minimal levels of impurities, such as carbonyl sulfide, that can
poison catalysts. Propylene has a calorific value of 45.813 kJ/kg, and RG propylene can be used as fuel if more valuable uses are
unavailable locally (i.e., propane – propene splitting to chemical-grade purity). RG propylene can also be blended into LPG for
commercial sale. Also, propylene is used as a motor gasoline component for octane enhancement via dimerization – formation of poly-
gasoline or alkylation. Propylene is commercially generated as a co-product, either in an olefins plant or a crude oil refinery’s fluid
catalytic cracking (FCC) unit, or produced in an on-purpose reaction (for example, in propane dehydrogenation, metathesis or syngas-
to-olefins plants).
15. CHEMICAL ENGINEERING AND SIMULATION
Globally, the largest volume of propylene is produced in NGL (Natural Gas Liquids) or naphtha steam crackers, which generates ethylene
as well. In fact, the production of propylene from such a plant is so important that the name “olefins plant” is often applied to this kind
of manufacturing facility (as opposed to “ethylene plant”). In an olefins plant, propylene is generated by the pyrolysis of the incoming
feed, followed by purification. Except where ethane is used as the feedstock, propylene is typically produced at levels ranging from 40
to 60 wt% of the ethylene produced. The exact yield of propylene produced in a pyrolysis furnace is a function of the feedstock and the
operating severity of the pyrolysis. The pyrolysis furnace operation usually is dictated by computer optimization, where an economic
optimum for the plant is based on feedstock price, yield structures, energy considerations and market conditions for the multitude of
products obtained from the furnace. Thus, propylene produced by steam cracking varies according to economic conditions. In an olefins
plant purification section, also called separation train, propylene is obtained by distillation of a mixed C3 stream, i.e., propane,
propylene, and minor components, in a C3-splitter tower (also called propylene-propane splitter, or simply P-P splitter). It is produced
as the overhead distillation product, and the bottoms are a propane enriched stream. The size of the C3-splitter depends on the purity
of the propylene product.
16. CHEMICAL ENGINEERING AND SIMULATION
The propylene produced in refineries also originates from other cracking processes. However, these processes can be compared to only
a limited extent with the steam cracker for ethylene production because they use completely different feedstocks and have different
production objectives. Refinery cracking processes operate either purely thermally or thermally – catalytically. By far the most important
process for propene production is the fluid catalytic cracking (FCC) process, in which the powdery catalyst flows as a fluidized bed
through the reaction and regeneration.
Figure 3: Separation of natural gas train
17. CHEMICAL ENGINEERING AND SIMULATION
The LPG production rate from the deethanizer , depropanizer and debutanizer depends on the quality of the crude. Since the crude
slates are different in different seasons, the LPG product rates are different. Using industrial data, the weight and volume of LPG are
calculated from the weight and volume of the debutanizer feed. The weight of the debutanizer bottom steam is then estimated
according to material balance. According to industrial data, the total volume loss is negligible in the debutanizer, less than 1 %. In other
words, the summation of the volumetric flow rates of LPG and debutanizer bottom product is almost equal to the volumetric flow rate of
the debutanizer feed. Assuming that there is no volume loss, the volumetric flow rate of the debutanizer bottom stream is then
calculated. Separations are “big businesses” in chemical processing. It has been variously estimated that the capital investment in
separation equipment is 40-50% of the total for a conventional fluid processing unit. Of the total energy consumption of an average
unit, the separation steps accounts for about 70%. And of the separation consumption, the distillation method accounts for about 95%.
In general, initial design of a distillation tower involves specifying the separation of a feed of known composition and temperature.
Constraints require a minimum acceptable purity of the overhead and/or bottoms product.
18. CHEMICAL ENGINEERING AND SIMULATION
The desired separation can be achieved with relatively low energy requirements by using a large number of trays, thus incurring larger
capital costs with the reflux ratio at its minimum value. On the other hand, by increasing the reflux ratio, the overhead composition
specification can be met by a fewer number of trays but with higher energy costs.
In particular, the optimization of reflux ratio is attractive for distillation columns that operate with:
1. high reflux ratio;
2. high differential product values between overhead and bottom;
3. high utility costs;
4. low relative volatility;
5. feed light key far from 50%.
19. CHEMICAL ENGINEERING AND SIMULATION
Figure 4 shows a typical olefins plant in which a propylene splitter is used for separating propane and propylene. The lighter
component (propylene) is more valuable than propane. The overhead stream has to be at least 95% propylene.
Figure 4: A schematic flow-sheet of a C3 splitter location in a light end gases plant.
20. CHEMICAL ENGINEERING AND SIMULATION
Figure 5: Another schematic implementation of C3 splitter for LPG facilities.
Propylene and propane are two isomeric compounds
with high affinity and similar volatility and due to this
feature they are very hard to separate in a single step
of stripping process. It will require different stages of
separation in column. So in this way unit operation
shall have high pressures about 13-17 bar from top
up to bottom side, consequently temperature are side
by side both 60 and 50 degree Celsius. It will be more
easy separating these compounds in a distillation
tower in which will be present other hydrocarbons as
well as ethane, n-butane or iso-butane and pentanes
and different kind of octanes and iso-octanes without
forgetting exanes and heptanes.
21. CHEMICAL ENGINEERING AND SIMULATION
Figure 6: 3D-Modelling of two kind of
splitters based on hydrocarbons (C2 and C3 ).
FEED
SPECIFICATIONS:
P= 16,55 atm
T= 41,66 °C
C2 = 0,0397 % mol
C3
= = 72,81 % mol
C3 = 26,48 %mol
C4 = 0,662 %mol
22. CHEMICAL ENGINEERING AND SIMULATION
Figure 7: Model of propylene-propane splitter.
In figure 7 has been seen a model of tower taken from Chemsep
software and this chapter will be considered the main features of
designing of distillation tower in valve fixed trays. At the first will
be adopted a theoretical model to evaluate theoretical
compositions as taken off products by two streams from the top
and the bottom from distillation column. Then, by using
commercial software, as CHEMCAD, ASPEN PLUS and CHEMSEP will
be able comparing these results with an accurate sense of
validation and relability in order to make real a preliminary design
of the same tower.
23. CHEMICAL ENGINEERING AND SIMULATION
SHORT-CUT METHOD FOR A MULTICOMPONENT SYSTEM
Short-cut methods were developed for the design of separation columns for hydrocarbon systems in the petroleum and petrochemical
systems industries, and caution must be exercised when applying them to other systems. They usually depend on the assumption of
constant relative volatility, and should not be used for severely non-ideal systems. If the presence of the other components does not
significantly affect the volatility of the key components, the keys can be treated as a pseudo-binary pair. The number of stages can then
be calculated using a McCabe-Thiele diagram, or the other methods developed for binary systems. This simplification can often be
made when the amount of the non-key components is small, or where the components form near-ideal mixtures. Where the
concentration of the non-keys is small, say less than 10 per cent, they can be lumped in with the key components. For higher
concentrations the method proposed by Hengstebeck (1946) can be used to reduce the system to an equivalent binary system.