1. The document describes an experiment to determine the diffusivity of acetone in air using Winkelmann's method. Acetone is allowed to evaporate from a vertical glass tube while air flows over it. The rate of drop in the acetone level is measured over time.
2. The rate data is used to calculate the diffusivity coefficient of acetone in air using Stefan's correlation. The diffusivity is expected to decrease over time as the concentration gradient decreases.
3. Procedures are provided to measure parameters like temperature, acetone density, air velocity and to record observations of acetone level drop at regular time intervals. The diffusivity is then calculated from the data.
Slides for the eLearning course Separation and purification processes in biorefineries (https://open-learn.xamk.fi) in IMPRESS project (https://www.spire2030.eu/impress).
Subject: 2.4 Plate efficiencies.
Slides for the eLearning course Separation and purification processes in biorefineries (https://open-learn.xamk.fi) in IMPRESS project (https://www.spire2030.eu/impress).
Subject: 2.4 Plate efficiencies.
COURSE LINK:
https://www.chemicalengineeringguy.com/courses/gas-absorption-stripping/
Introduction:
Gas Absorption is one of the very first Mass Transfer Unit Operations studied in early process engineering. It is very important in several Separation Processes, as it is used extensively in the Chemical industry.
Understanding the concept behind Gas-Gas and Gas-Liquid mass transfer interaction will allow you to understand and model Absorbers, Strippers, Scrubbers, Washers, Bubblers, etc…
We will cover:
- REVIEW: Of Mass Transfer Basics required
- GAS-LIQUID interaction in the molecular level, the two-film theory
- ABSORPTION Theory
- Application of Absorption in the Industry
- Counter-current & Co-current Operation
- Several equipment to carry Gas-Liquid Operations
- Bubble, Spray, Packed and Tray Column equipments
- Solvent Selection
- Design & Operation of Packed Towers
- Pressure drop due to packings
- Solvent Selection
- Design & Operation of Tray Columns
- Single Component Absorption
- Single Component Stripping/Desorption
- Diluted and Concentrated Absorption
- Basics: Multicomponent Absorption
- Software Simulation for Absorption/Stripping Operations (ASPEN PLUS/HYSYS)
----
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More likes, sharings, suscribers: MORE VIDEOS!
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CONTACT ME
Chemical.Engineering.Guy@Gmail.com
www.ChemicalEngineeringGuy.com
http://facebook.com/Chemical.Engineering.Guy
You speak spanish? Visit my spanish channel -www.youtube.com/ChemEngIQA
Armfield Gas Absorption Column ExperimentHadeer Khalid
The absorption of CO2 from air to water was studied in Gas absorption column built by Armfield company. Lab report and experiment was part of Separation Lab.
Bernoulli equation Determination through LAB work.pdfBapi Mondal
Applying Bernoulli equation to determine the orifice throat diameter of the
given orifice meter and plotting the following curves.
a) Pressure difference vs Reynolds number.
b) Log pressure difference vs Log velocity
c) Log average velocity vs manometer reading and find the slope of the line.
COURSE LINK:
https://www.chemicalengineeringguy.com/courses/gas-absorption-stripping/
Introduction:
Gas Absorption is one of the very first Mass Transfer Unit Operations studied in early process engineering. It is very important in several Separation Processes, as it is used extensively in the Chemical industry.
Understanding the concept behind Gas-Gas and Gas-Liquid mass transfer interaction will allow you to understand and model Absorbers, Strippers, Scrubbers, Washers, Bubblers, etc…
We will cover:
- REVIEW: Of Mass Transfer Basics required
- GAS-LIQUID interaction in the molecular level, the two-film theory
- ABSORPTION Theory
- Application of Absorption in the Industry
- Counter-current & Co-current Operation
- Several equipment to carry Gas-Liquid Operations
- Bubble, Spray, Packed and Tray Column equipments
- Solvent Selection
- Design & Operation of Packed Towers
- Pressure drop due to packings
- Solvent Selection
- Design & Operation of Tray Columns
- Single Component Absorption
- Single Component Stripping/Desorption
- Diluted and Concentrated Absorption
- Basics: Multicomponent Absorption
- Software Simulation for Absorption/Stripping Operations (ASPEN PLUS/HYSYS)
----
Please show the love! LIKE, SHARE and SUBSCRIBE!
More likes, sharings, suscribers: MORE VIDEOS!
-----
CONTACT ME
Chemical.Engineering.Guy@Gmail.com
www.ChemicalEngineeringGuy.com
http://facebook.com/Chemical.Engineering.Guy
You speak spanish? Visit my spanish channel -www.youtube.com/ChemEngIQA
Armfield Gas Absorption Column ExperimentHadeer Khalid
The absorption of CO2 from air to water was studied in Gas absorption column built by Armfield company. Lab report and experiment was part of Separation Lab.
Bernoulli equation Determination through LAB work.pdfBapi Mondal
Applying Bernoulli equation to determine the orifice throat diameter of the
given orifice meter and plotting the following curves.
a) Pressure difference vs Reynolds number.
b) Log pressure difference vs Log velocity
c) Log average velocity vs manometer reading and find the slope of the line.
Determining Surface Tension of Different Fluids with The Help of TensiometerIRJESJOURNAL
Abstract:- Current research work taken in account of surface tension of various fluids available like diesel, petrol, water. The purpose of this experiment is to determine the equivalence between surface tension and surface energy. sThis project covered the importance of surface tension of different fluids with the help of a case study from Lords Institute of Engineering & Technology.
Dewatering Waste Activated Sludge Using Greenhouse-Gas Flotation followed by ...Medhat Elzahar
The aim of this study is to develop a simple method
for dewatering waste-activated sludge (WAS) for easier reuse
and safer disposal of sludge. The paper builds on the success of
a new flotation technique developed in previous research by the
author utilizing the high water solubility of CO2 gas along with
the model-gas (80%N2+20%CO2). The paper introduces a
simple laboratory model for dewatering WAS in two stages,
flotation followed by centrifugation. The first stage enables
recycling a mixture of greenhouse gases containing 20% of CO2
and 80% of N2 gases by volume. The second stage uses a simple
centrifuge model for dewatering WAS. Experiments were
carried out to reduce the moisture content and volume of WAS.
This was executed by generating low pressure using centrifugal
force introduced by a simple centrifuge apparatus. Using the
experimental dewatering model, promising results were
obtained for dewatering WAS. Furthermore, additional data
were obtained, such as the effect of temperature on the
efficiency of dewater-ability. It is hoped that the results of this
study will lead to more study for the efficient reuse of
greenhouse gases. This can happen by collecting and recycling
industrial emissions of fossil fuels then utilizing them in
wastewater and sludge treatment, thereby decreasing the
resulting harmful effects of these gases on global warming.
1. Determination of viscosity of pure liquids such as glycerin, alcohol and nitrobenzene using Ostwald viscometer.
2. Determination of viscosity coefficient of a liquid at two different temperatures and finding out the temperature coefficient for the given liquid.
3. Determination of viscosity coefficient of the water-alcohol mixtures and comment on the structure of the solutions.
4. Determination of viscosity coefficient of a liquid at different temperatures and estimation of the activation parameters of viscous flow.
5. Determination of partition coefficient of (i) salicyclic acid between water and chloroform, (ii) benzoic acid between toluene and water, (iii) iodine between methylene chloride and water
6. Determination of velocity constant of the hydrolysis of methyl/ethyl acetate catalyzed by HCl.
7. Determination of absorption isotherm of oxalic (or acetic) acid from aqueous solution by charcoal and calculation of the constant in Freundlich’s equation.
8. Determination of the equilibrium constant of the reaction Kl +I2= KI3.
9. Determination of titration curve for the titration of a weak base with a strong acid and a strong base with a weak acid pH metrically and hence finding their strengths.
10. Determination of solubility of a sparingly soluble salt in water by conductance measurement.
11. Determination of velocity constant for the hydrolysis of an ester in the basic medium by conductance measurement.
12. Determination of the molecular weight of an organic solid like camphor by cryoscopy.
13. Determination of the molecular weight of a solid like naphthalene by ebullioscopy.
14. Determination of dissociation constants of some organic weak acids by potentiometric method.
15. Determination of heat of solution by solubility methods
This presentation is a samle demonstration of the newton's law of cooling. The first part of the video defines the law and the second part designs an experiment to findout the specific heat of a given liquid by the method of cooling.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
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.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Immunizing Image Classifiers Against Localized Adversary Attacks
Mto lab
1. Air-Liquid Diffusion
Aim: To study the steady State Diffusion of Acetone in Air and Calculate the Diffusivity for the same.
Apparatus: Glass tube, measuring Cylinder, Heating Coils, Blower.
Chemicals: Acetone
Theory:
Diffusivities are most conveniently determined by Winkelmann’s Method, in which liquid is allowed
to evaporate in a vertical glass tube over the top of which steam of vapour free gas is passed, sufficiently
rapidly for the Vapour Pressure to be maintained at almost zero. If the apparatus is maintained at a steady
temperature, there will be no eddy currents in the vertical tube and mass transfer will take place from the
surface by means of molecular diffusion alone. The rate of evaporation can then be determined by the rate of
fall of liquid surface and since the concentration gradient is known the diffusivity can then be calculated.
Procedure:
1. Fill up the Water tank and start the water heater.
2. Fill the Glass tube with acetone upto a specified level by using long neck funnel.
3. Allow the temperature to rise upto 50o C and maintain it at same temperature.
4. Ensure that the outlet (bypass) valve of the blower is fully open and that the tube side valve is fully
closed.
5. Open the tube side valve and allow air to flow gently over the diffusing fluid (here Acetone)
6. Note the drop in height of liquid inside the tube after a time interval of every 5 minutes.
7. Calculate the diffusivity using Stefan’s correlation
Observations:
1. Temperature of Air =
2. Temperature of Water Bath =
3. Density of Acetone =
4. Molecular Weight of Acetone =
5. Velocity of Air =
6. I.D. of Tube containing Acetone =
7. Area of air outlet =
Observation Table:
Sr. No. Time t Level of Acetone (Z1
2- Z2
2) DAB* 10-3
Z1 Z2 2t
(ml) (mL) (m2/s)
1
2
3
4
5
6
Volume = Area x Height
Area = π Di
2 /4
Where, Di = I.D. of Tube containing Acetone
= 20mm
2. Calculations:
1. Total Pressure
Velocity of air =
Area of Discharge =
Discharge = Area x Velocity
= m3/s
Power of Motor = W
Pressure of Air on Acetone = Pressure / Discharge
= kPa
Vapour Pressure at 50o C
lnP = A – (B/(T+C))
A = 16.6513
B = 2940.46
C = -35.93
lnP =
P = kPa
Therefore, Total Pressure on interface
P = Pb-p
= kPa
2. Initial number of moles in the tube
n = ρZ1 / M
= kmol
Moles diffused after 10 minutes
n10 = ρ(Z1 – Z2) / M
= kmol
Therefore, mole fraction of Acetone in air
X10 = n10/n
= xA1
PA1 = xA1 * P
= kPa
Mole fraction of air in the gaseous mixture after 10 minutes
XB1 = 1-xA1
=
Therefore PB1 = kPa
Now PA2 = 0 kPa
PB2 = 101.325 kPa
PBM = (PB2 - PB1) / ln ( PB2 / PB1)
DAB = (Z12 - Z22) RT PBM
Z1 * P * (PA1 - PA2)
= m2/s
3. Results:
SR.NO. Time DAB
(s) (m2/s)
1
2
3
4
5
6
Conclusions:
1. As the time increases the concentration of Acetone (A) in air (B) increases.
2. As the time increases the diffusivity of acetone in air decreases due to the decrease in concentration
gradient.
4. Tray Dryer
Aim: To study the characteristics of Tray dryer and to calculate the rate of drying.
Apparatus: Tray dryer, weighing balance, blower.
Materials: Water, Chalk pieces.
Theory:
Equipments used for drying processes can be classified according to
1. Methods of operation
2. Methods of supplying the heat necessary for evaporating the moisture
3. Nature of substance to be dried
Tray Dryers are the batch type dryers and direct dryers. In this type of dryers, heat is supplied directly by
direct contact with the substance with the hit gas into which evaporation takes place.
Construction & Working:
A typical tray dryer consists of a cabinet containing removable trays on which the solid to be dried is
placed. After loading the solids onto the tray, the cabinet is closed and hot air is blown across and between
the trays to evaporate the moisture. Moist air is continuously vented out through a small duct.
Rate of Batch Reaction:
In order to set up drying schedules and to determine the size of equipment it is necessary to know the
time required to dry the substance from one level of moisture to another under specified conditions.
Rate of drying can be determined by measuring the weights of drying ample at different times. From
the data so obtained a graph of moisture v/s time is plotted and the rate can be calculated as
Rate = -M * Win / A
Where M = Slope of Curve
Win= Initial weight of feed
A = cross sectional area of Tray
Procedure:
1. Note the dimensions of the tray.
2. Weigh the dry feed.
3. Add a known quantity of water to the dry feed
4. Spread the sample uniformly on the tray and close the cabinet.
5. Switch on the heater and the blower.
6. Note the weight of sample after every 5 minutes and the corresponding temperature upto 30 minutes.
Graphs: The following graphs are to be plotted
1. Moisture Content v/s Time
2. Rate of Drying v/s Moisture content
Observations:
1. Weight of Dry feed =
2. Weight of Water =
3. Area of Tray =
5. Observation Table:
Sr. Time Weight Temperature
No. (minutes) (gm) (OC)
Dry Bulb Wet Bulb
1
2
3
4
5
6
7
8
Calculations:
At time t , Rate = -M * Wini / A
Moisture content= kg moisture/kg dry feed
Results:
Sr. Time Slope Rate of Drying Moisture content
No. (minutes) (gm/min) (gm/m2s) (kg moisture/ kg feed)
1
2
3
4
5
6
7
8
6. Liquid-Liquid Diffusion
Aim: To study the steady state molecular diffusion of Acetic acid through water and determine the
diffusivity of the
Same.
Apparatus: Porous pot, beaker, conical flask, burette, pipette.
Chemicals: Acetic acid, NaOH, Phenolphthalein indicator.
Theory:
The term molecular diffusion is concerned with the movement of individual molecules through a
substance by virtue of their thermal energy.
In a liquid solution, if the solution is uniform everywhere in the concentration of its constituents, no
alteration occurs but as long as it is not uniform, the solution is spontaneously brought to uniform by
diffusion. The substance moves from the place of high concentration to the one of low concentration. The
rate at which the diffusing substance moves at any point in any direction must therefore depend upon the
concentration gradient at that point and in that direction. To describe the motion of one component into the
other, two molar fluxes are used. NA the flux relative to a fixed position in space and JA the flux relative to
the average molar velocity of all constituents.
The diffusivity of a constituent A in the solution B is a measure of the diffusive mobility and defined
as the ration of its flux to its concentration gradient.
JA= - DAB (dCA/dz)
This is known as Fick’s law written for z-direction. The negative sign indicates that diffusion occurs in a
direction of decreasing concentration, in agreement with the second law of thermodynamics. Because of
high molecular concentrations, these diffusivities are of very low value of magnitude of 10-9 .
For liquid-liquid diffusion, the following cases can be studied:
1. Steady state diffusion of A through non diffusing B
NA=constant , NB=0
NA= DAB ρavg (xA1 - xA2)
Z xBM Mavg
Where
xBM = ( xB2 – xB1)
ln( xB2 / xB1)
2. Steady state equimolar counter diffusion
NA=NB=constant
NA= DAB ρavg (xA1- xA2)
Z Mavg
Procedure:
1. Acetic Acid is titrated against NaOH to find out its initial concentration.
2. A porous pot filled with Acetic Acid is then immersed in a beaker containing 1.8 l of Water.
3. After every 10 minutes 10ml of solution is pipetted out from a fixed point in a beaker and titrated with
0.1N NaOH using phenolphthalein as an indicator.
4. The same procedure is repeated and 5 more readings are taken.
Precaution:
Care should be taken that the solution is pipetted from same point.
Observations:
1. I.D. of porous pot = 4.8cm
2. O.D. of porous pot = 6.04cm
3. Thickness = 0.62cm
7. 4. Volume of water in beaker = 1.8l
5. Height of acid in porous pot =
6. Initial conc. Of Acetic Acid =
7. Diameter of Beaker = 20cm
Observation Table:
Sr. Time Burette Normality Gm of Acetic Acid Gm of Acetic Acid
No. (minutes) Reading (N) diffused per litre diffused totally
(ml)
1.
2.
3.
4.
5.
6.
Calculations:
1. Surface Area of Porous Pot = πDoL + πDo
2/4 =
2. Normality
N1V1 = N2V2
Acetic Acid (AA) NaOH
N1 = N2V2/V1
= N
3. Grams of AA diffused per lit. = 60N1
= g/l
4. Grams of AA diffused totally =
5. NA = gm of AA totally diffused
Area * time * 60
= kmol/m2s
6. Volume of AA in porous pot = π Di
2 L / 4
7. Weight of AA present initially = ρ V
= kg
no = kmol
8. Weight of AA after 10 min = NA * A * MAA * 600
9. Mole fraction of AA
xA1 (at 10 min) = NA * A * MAA * 1200/no =
xA2 (at 20 min) = NA * A * MAA * 1200/no =
xB1 = ( 1 - xA1 ) =
xB2 = ( 1 – xA2) =
xBM = xB2 - xB1
ln( xB2 / xB1)
=
(ρavg)1 = xA1 * ρAA + xB1 * ρw
=
(ρavg)2 = xA2 * ρAA + xB2 * ρw
=
(ρavg) = { (ρavg)1 + (ρavg)2 } / 2
= kg/m3
(Mavg)1 = xA1 * MAA + xB1 * Mw
=