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Synthesis Gas Production via Reverse Water-Gas Shift : Co-Conversion of Gaseous Hydrocarbons

Title data

Wolf, Andreas ; Kern, Christoph ; Jess, Andreas:
Synthesis Gas Production via Reverse Water-Gas Shift : Co-Conversion of Gaseous Hydrocarbons.
2015
Event: DGMK International Conference "Synthesis Gas Chemistry" , 07.-09.10.2015 , Dresden, Deutschland.
(Conference item: Conference , Speech )

Abstract in another language

Conversion of CO₂ (e.g. separated from flue gases of power plants) and regenerative hydrogen (electrolysis) into liquid hydrocarbons (HC) is a promising concept for substituting fossil fuel in the transport sector. Such a synthesis requires two process steps:
1) Syngas production via reverse water-gas shift (RWGS)
2) Synfuel production by Fischer-Tropsch (FTS)
As product, a wide range of gaseous, liquid and waxy HCs is gained. Liquid HCs are the most valuable and, therefore, desired products; thus, a process optimization towards maximum yield of liquid HCs is aspired. The waxy products can be liquefied in a downstream hydrocracking process. For the gas fraction, consisting of H₂, CO, CO₂ and CH₄, thermodynamic considerations suggest a recycle of this fraction into the RWGS unit; here, the gaseous compounds can be co-converted to syngas via steamreforming (with RWGS product water). Apart from thermodynamics, this work examined the catalytic activity and stability of the RWGS catalyst (Ni) in the presence of short chain hydrocarbons, namely CH₄ and C₃H₈, inside the RWGS unit. The catalyst showed a stable performance for the conversion of CH₄, even under dry conditions, as long as the CH₄-to-CO₂ ratio was below 1. However, propane led to catalytic coke formation which eventually caused catalyst deactivation. Thus, the influence of different oxidants on coking was examined, and it was found that coke formation can be effectively suppressed with additional H₂O in the feed gas.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Faculties
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 11 Feb 2016 08:23
Last Modified: 11 Feb 2016 08:23
URI: https://eref.uni-bayreuth.de/id/eprint/30607