This document discusses synthetic fuels, which are defined as liquid or gaseous hydrocarbon fuels produced from natural gas, coal, biomass, or other resources besides conventional crude oil. Synthetic fuels are needed due to the finite supply of crude oil and increasing global energy demand. They can be produced through direct or indirect conversion processes. Direct conversion involves pyrolysis or hydrogenation, while indirect conversion uses gasification to produce syngas that is then converted to liquid fuels. Key production methods discussed are Fischer-Tropsch synthesis, biomass conversion, and ensuring synthetic fuel production is sustainable.
Primary fuels – Fuels which occur naturally such as coal, crude petroleum and natural gas. Coal and crude petroleum, formed from organic matter many millions of years ago, are referred to as fossil fuels.
Secondary fuels – Fuels which are derived from naturally occurring ones by a treatment process such as coke, gasoline, coal gas etc.
Primary fuels – Fuels which occur naturally such as coal, crude petroleum and natural gas. Coal and crude petroleum, formed from organic matter many millions of years ago, are referred to as fossil fuels.
Secondary fuels – Fuels which are derived from naturally occurring ones by a treatment process such as coke, gasoline, coal gas etc.
”Waste heat recovery” is the process of “heat integration”, that is, reusing heat energy that would otherwise be disposed of or simply released into the atmosphere. By recovering waste heat, plants can reduce energy costs and CO2 emissions, while simultaneously increasing energy efficiency.
Episode 3 : Production of Synthesis Gas by Steam Methane ReformingSAJJAD KHUDHUR ABBAS
Episode 3 : Production of Synthesis Gas by Steam Methane Reforming
History of Synthesis Gas
In 1780, Felice Fontana discovered that combustible gas develops if water vapor is passed over carbon at temperatures over 500 °C. This CO and H2 containing gas was called water gas and mainly used for lighting purposes in the19th century.
As of the beginning of the 20th century, H2/CO-mixtures were used for syntheses of hydrocarbons and then, as a consequence, also called synthesis gas.
Haber and Bosch discovered the synthesis of ammonia from H2 and N2 in 1910 and the first industrial ammonia synthesis plant was commissioned in 1913.
The production of liquid hydrocarbons and oxygenates from syngas conversion over iron catalysts was discovered in 1923 by Fischer and Tropsch.
Much of the syngas conversion processes were being developed in Germany during the first and second world wars at a time when natural resources were becoming scare and alternative routes for hydrogen production, ammonia synthesis, and transportation fuels were a necessity.
In 1943/44, this was applied for large-scale production of artificial fuels from synthesis gas in Germany.
Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Syllabus:
Availability and Irreversibility
Availability Function
Second Law Efficiencies
Work Potential Associated with Internal Energy
Waste Heat Recovery
Heat Losses – Quality vs. Quantity
Principle of Heat Recovery Units
Classification of WHRS on Temperature Range Bases
Commercial Viable Waste Heat Recovery Devices
Benefits of Waste Heat Recovery
Development of a Waste Heat Recovery System
Commercial Waste Heat Recovery Devices
West Heat Recovery Boiler (WHRB)
Recuperators- Regenerative, Ceramic, Regenerative Heat Exchanger
Thermal wheel/ Heat Wheel
Heat Pipe
Economiser
Feed Water
Heat Pump
Shell and Tube Heat Exchanger
Plate Heat Exchanger
Run-around coil
Direct Contact Heat Exchanger
Advantages and Limitations of WHRD’s
Gasification process for generating producer gas by updraft, downdraft etc. and advantage and disadvantages of gasifier and application of producer gas for generating electricity or motive power for running the engine.
”Waste heat recovery” is the process of “heat integration”, that is, reusing heat energy that would otherwise be disposed of or simply released into the atmosphere. By recovering waste heat, plants can reduce energy costs and CO2 emissions, while simultaneously increasing energy efficiency.
Episode 3 : Production of Synthesis Gas by Steam Methane ReformingSAJJAD KHUDHUR ABBAS
Episode 3 : Production of Synthesis Gas by Steam Methane Reforming
History of Synthesis Gas
In 1780, Felice Fontana discovered that combustible gas develops if water vapor is passed over carbon at temperatures over 500 °C. This CO and H2 containing gas was called water gas and mainly used for lighting purposes in the19th century.
As of the beginning of the 20th century, H2/CO-mixtures were used for syntheses of hydrocarbons and then, as a consequence, also called synthesis gas.
Haber and Bosch discovered the synthesis of ammonia from H2 and N2 in 1910 and the first industrial ammonia synthesis plant was commissioned in 1913.
The production of liquid hydrocarbons and oxygenates from syngas conversion over iron catalysts was discovered in 1923 by Fischer and Tropsch.
Much of the syngas conversion processes were being developed in Germany during the first and second world wars at a time when natural resources were becoming scare and alternative routes for hydrogen production, ammonia synthesis, and transportation fuels were a necessity.
In 1943/44, this was applied for large-scale production of artificial fuels from synthesis gas in Germany.
Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Syllabus:
Availability and Irreversibility
Availability Function
Second Law Efficiencies
Work Potential Associated with Internal Energy
Waste Heat Recovery
Heat Losses – Quality vs. Quantity
Principle of Heat Recovery Units
Classification of WHRS on Temperature Range Bases
Commercial Viable Waste Heat Recovery Devices
Benefits of Waste Heat Recovery
Development of a Waste Heat Recovery System
Commercial Waste Heat Recovery Devices
West Heat Recovery Boiler (WHRB)
Recuperators- Regenerative, Ceramic, Regenerative Heat Exchanger
Thermal wheel/ Heat Wheel
Heat Pipe
Economiser
Feed Water
Heat Pump
Shell and Tube Heat Exchanger
Plate Heat Exchanger
Run-around coil
Direct Contact Heat Exchanger
Advantages and Limitations of WHRD’s
Gasification process for generating producer gas by updraft, downdraft etc. and advantage and disadvantages of gasifier and application of producer gas for generating electricity or motive power for running the engine.
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2. SYNTHETIC FUEL DEFINITONS
Synthetic Feed stocks
Any feedstock NOT produced from conventional
crude petroleum.
Resource can be any burnable
material:
Coal
Biomass
Natural gas
Synthetic Fuels
A generic name given to hydrocarbon fuels produced from
natural gas, coal or biomass
3. A number of synthetic fuel's definitions
include fuels produced from biomass,
industrial and municipal waste. The definition
of synthetic fuel may also consist of oil
sands and oil shale as synthetic fuel's
sources and in addition to liquid fuels also
gaseous fuels are covered.
James G. Speight included liquid and gaseous
fuels as well as clean solid fuels produced by
conversion of coal, oil shale or tar sands, and
various forms of biomass.
4. WHY ARE SYNTHETIC FUELS
NEEDED?
5 Reasons for continued production and
improvement of synthetic fuels
• World has a finite supply of conventional
crude oil.
• India’s demand for crude oil is steadily
increasing
• The world jet fuel market is decreasing
• National Security and energy independence
• Synthetic Fuels help India to reduce
dependency on foreign oil.
6. SYNTHETIC FEEDSTOCK
PROCESSES
Synthetic Feedstock sources include:
Natural Gas to Liquids
Coal Gasification: Producing synthetic natural gas
from Coal
Coal Liquefaction: Conversion of coal to liquid
for use as a synthetic fuel.
7. Alternate crude sources include
Shale Oil: Extracted hydrocarbon known
as Kerogen from shale (large shale formations
Exist in Colorado, Utah, and Wyoming)
Tar Sands: Extraction of very heavy, asphalt
“like” crude oil called Bitumen from grains of
sand, or, in some cases, porous carbonate rocks.
The U.S. has some tar sands mainly in Utah. The
largest deposits are in Canada.
8. PRODUCTION OF SYNTHETIC
FUELS
Synthetic fuels are produced by the
chemical process of CONVERSION.
Conversion methods could be Direct
Conversion into liquid transportation fuels,
or Indirect Conversion, in which the source
substance is converted initially into
syngas which then goes through additional
conversion process to become liquid
fuels. Basic conversion methods include
carbonization & pyrolysis along with
hydrogenation & thermal dissolution.
9.
10. DIRECT CONVERSION
Direct conversion refers to processes in
which coal or biomass feedstocks are
converted directly into intermediate or
final products, without going through the
intermediate step of conversion to syngas
via gasification.
Direct conversion processes can be broadly
broken up into two different methods:
Pyrolysis or Carbonization
Hydrogenation
11. HYDROGENATION PROCESSES
One of the main methods of direct
conversion of coal to liquids is by
hydrogenation process or the Bergius
process. In this process, coal is liquefied
by mixing it with hydrogen gas and heating
the system (hydrogenation). Dry coal is
mixed with heavy oil recycled from the
process.
The reaction can be summarized as follows
2222 HHCHC nnnn
12. PYROLYSIS OR CARBONIZATION
PROCESSES
The carbonization conversion occurs
through pyrolysis or destructive distillation, and it
produces condensable coal tar, oil and water
vapour, non-condensable synthetic gas, and a solid
residue-charcoal. The condensed coal tar and oil
are then further processed by hydrogenation to
remove sulphur and nitrogen species, after which
they are processed into fuels.
The process was invented by Lewis Cass Karrick in
the 1920s. Its a low temperature carbonization
where coal is heated at 680 °F (360 °C) to
1,380 °F (750 °C) in the absence of air.
13. INDIRECT CONVERSION
Indirect conversion broadly refers to a
process in which biomass, coal, or natural gas
is converted to a mixture
of hydrogen and carbon monoxide also known
as syngas either,
through gasification or steam methane
reforming, and that syngas is processed into
a liquid transportation fuel using one of a
number of different conversion techniques
depending on the desired end product
14. 1) FISHER-TROPSCH PROCESS
• Fisher-Tropsch (FT) is an emerging technology for
Converting synthetic crude to synthetic fuels.
Brief History
Developed by Germany during World War II to
make gasoline from coal.
Developed out of necessity from a lack of
available crude oil.
Modernized in South Africa by SASOL
Corporation.
15. • Converts coal, natural gas, and low-value refinery
products into high value, clean burning fuel.
• FT offers important emissions benefits compared to
conventional fuel.
Natural Gas
Coal
Pet Coke
Biomass
Wastes
Synthesis Gas
Production
Oxygen
Plant
Air
O2
FT
Liquid
Synthesis
Product
Recovery
Liquid
Fuels
Transportation
Fuels
Tail
Gas
Power
Generation
H2
Hydrogen
Recovery
Wax
Hydrocracking
Wax
Hydrogen
Separation
Hydrogen
Liquid
Fuels
An
Option
CO
H2
Reference: Review of Responses to RFI on Synthetic Fuel, 31 August 2006 (DESC internal presentation)
16. 2) SYNTHETIC FUEL FROM
BIOMASS
Biomass can be any plant derived organic matter,
available on a renewable basis including:
• Dedicated energy crops and trees
• Agricultural food and feed crops
• Agricultural crop wastes
• Wood wastes and residues
• Aquatic Plants
• Animal wastes
• Municipal wastes and other waste
materials.
17.
18. BIOMASS USAGE
Leading source of renewable energy in U.S.
since 1999 .
Provides fuel, heat, electricity, chemicals
and other products.
Agricultural and forestry residues most
common resource for generating electricity
and process steam.
Increases use of crops for biodiesel and
ethanol .
Source: www.eere.energy.gov/biomass
19. BIOMASS PLATFORMS FOR
PRODUCING FUELS
Source: Office of the Biomass Program-Multiyear Plan 2004 and Beyond, Nov. 2003
Biomass
Feed
Pretreatment
Sugar
platform
Hydrolysis/
Separation
Thermochemical
Platform
Gasification/
Pyrolysis
Sugar
Feedstocks
Syngas/
Pyrolysis
Oils
CONVERSION
Catalytic
Chemical
Biological
Thermal
Biobased Fuels
Ethanol, alcohol blends,
Fischer-Tropsch
Liquids, bio-oils,
Biodiesel, fuel additives
Oxygenates, hydrogen
Biobased Products
Replacements for
existing commodity
chemicals, new
commodity chemicals
with improved
performance and
functionality, building
blocks for secondary
chemicals
Electricity and Heat
For utilities, from
distributed systems using
biomass or as a part
of a grid-connected
biorefinary
Residues
20. SUSTAINABILITY
One concern commonly raised about the
development of synthetic fuels plants is
sustainability. Fundamentally, transitioning from
oil to coal or natural gas for transportation fuels
production is a transition from one inherently
depleteable geologically limited resource to
another. One of the positive defining
characteristics of synthetic fuels production is
the ability to use multiple feedstocks (coal, gas,
or biomass) to produce the same product from
the same plant.
21. This provides a path forwards to a
renewable fuel source and possibly more
sustainable, even if the plant originally
produced fuels solely from coal, making
the infrastructure forwards-compatible
even if the original fossil feedstock runs
out.