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

Titelangaben

Wolf, Andreas ; Kern, Christoph ; Jess, Andreas:
Synthesis-Gas-Production via Reverse Water-Gas Shift : Co-Conversion of Gaseous Hydrocarbons.
In: German Society for Petroleum and Coal Science and Technology (Hrsg.): DGMK Tagungsbericht 2015-2. - Hamburg : Deutsche Wissenschaftliche Gesellschaft für Erdöl, Ergas und Kohle e.V. , 2015 . - S. 25-32
ISBN 978-3-941721-56-2

Abstract

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.

Weitere Angaben

Publikationsform: Aufsatz in einem Buch
Begutachteter Beitrag: Nein
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik > Lehrstuhl Chemische Verfahrenstechnik - Univ.-Prof. Dr.-Ing. Andreas Jess
Fakultäten
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 660 Chemische Verfahrenstechnik
Eingestellt am: 15 Okt 2015 07:32
Letzte Änderung: 15 Okt 2015 07:32
URI: https://eref.uni-bayreuth.de/id/eprint/20503