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Fisher-Tropsch Process Adnan Bashir Bin Divakaransantha Prakash Poudel Semir Kelifa Department of Chemical and Bio molecular Engineering, University of.

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Presentation on theme: "Fisher-Tropsch Process Adnan Bashir Bin Divakaransantha Prakash Poudel Semir Kelifa Department of Chemical and Bio molecular Engineering, University of."— Presentation transcript:

1 Fisher-Tropsch Process Adnan Bashir Bin Divakaransantha Prakash Poudel Semir Kelifa Department of Chemical and Bio molecular Engineering, University of Maryland CHBE446 February 05, 2015

2 Outline  Intro/Historical Background  Definition  Reaction type/Mechanism  Use/Industrial Importance  Technology/Reactors  Catalysis  Conclusion

3 History  Sabatien & Senderens (1902) produced mixture of hydrocarbons  Not favorable at the time  No single product formed  Priority given to methanol and ammonia

4 History Cont. Fischer and Tropsch  Used base catalyst like alkalized iron and produced “synthol”  Temperature of about Celsius and 150 atm  Higher hydrogen to CO ratio produced better product  Tested this fluid like substance in 1922 NSU motorbike  Seated 2 people and outperformed reference fuel Catalyst video

5 History Cont..  Tested this fluid like substance in 1922 NSU motorbike  Seated 2 people and outperformed reference fuel  Encouraging performance led to World War II fuel supply  Fist plant made in Germany in 1934  By ,000 tons per-anum produced

6 Source:

7 Reaction steps  Associative adsorption of CO and splitting of C/O bond  Dissociative adsorption of 2H 2  Transfer of 2H to the oxygen to yield H 2 O  Desorption of H 2 O  Transfer of 2H to the carbon to yield CH 2

8 Main reactions

9 Main reactions cont..

10 Useful Products  Gas-to-liquids (GTL)  Biomass-to-liquids (BTL)  Coal to liquid (CTL)  Can be used to produce I. Deiseal Fuel/Jet Fuel/Kerosene II. Waxes/Lubricants III. Naphtha/Gasoline/Detergent Source:

11 Technology/ Reactors Fixed Bed Reactors  Originally used  Challenges associated with removal of heat Fluidized Bed Reactors  Better temperature control  High yields for Gasoline and light products Source:http://www.altenergymag.com/emagazine/2014/02/india-sustainable-communities-proposal/2216

12 Technology cont.. Slurry Reactors  Small catalyst particles suspended in a liquid with low vapor pressure  Low Temperature  Flexible design  High yield for waxes Source:http://www.altenergymag.com/emagazine/2014/02/india-sustainable-communities-proposal/2216

13 Catalysis  Based on Transition Metals  Iron(Fe) -Low Cost -Higher Water Gas Shift activity -Suitable for lower syngas(H2/CO)  Cobalt(Co) -More Active -Less Water Gas Shift activity -Higher Cost Source:http://periodictable.com/Elements/027/

14 Catalysis cont.. I. Nickel(Ni) -Promotes Methane formation -Generally not desired I. Ruthenium(Ru)  High molecular weight Hydrocarbons  High Cost  Not generally used Source:http://periodictable.com/Elements/027/

15 Promoters  Fe Based Catalysts - Promoted with Alkali metals -to obtain high basicity, and to stabilize catalyst -Higher alkali level higher the shift to longer chains -Addition of copper: Enhances reducibility  Co Based Catalysts -promoted with small amounts of noble metals -reduces reduction temperature/pressure -yields less olefins and oxygenated products

16 Cost Source: 2013_PW.pdf

17 Conclusion  Process developed by Fischer and Tropsch  Many possibilities exist and it is still a research interest  Useful for production of clean energy and the future of Biofuels  Different reactor technologies for different desirable products  Catalysts utilized based on need and cost

18 Questions?

19 Sources emerging-industry %20Literature%20review%20-%20FTS.pdf CoalGasification-Jun07.pdf work-at-smaller-scale/


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