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Methane production from co-electrolysis products applying a microchannel reactor

Belimov, Michael

Abstract (englisch):

This PhD thesis comprises the development of a polytropic microstructured methanation unit for
conversion of CO/CO$_2$ mixtures. As part of the MINERVE Power-to-Gas project, conducted from
2012-2015, the developed reactor contributes to transformation of electrical surplus energy into chemical
energy by using methane.
The theory focuses on the examination of thermodynamic equilibria, methane formation mechanisms,
catalyst degradation and kinetics. From a technological point of view, microreactors were identified
as a promising tool due to the possibility of precise temperature control, which is key in the highly
exothermic methanation reaction.
The experimental procedure encompasses the catalyst behavior under variation of H$_2$/C-ratio, temperature
and concentrations of CO and CO$_2$. Under CO methanation conditions, strong deactivation of
the commercial Ni catalyst was observed, while almost no catalyst degradation was encountered under
pure CO$_2$ methanation conditions. The assumption of deactivation by coke was supported with surface
carbon and BET-surface decrease. Preferential methantion of CO was observed in CO/CO$_2$-mixtures
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Volltext §
DOI: 10.5445/IR/1000126562
Veröffentlicht am 24.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikroverfahrenstechnik (IMVT)
Publikationstyp Hochschulschrift
Publikationsdatum 24.11.2020
Sprache Englisch
Identifikator KITopen-ID: 1000126562
HGF-Programm 37.03.01 (POF III, LK 01) Catalysts and Mechanisms
Verlag Karlsruher Institut für Technologie (KIT)
Umfang VI, 189 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Chemieingenieurwesen und Verfahrenstechnik (CIW)
Institut Institut für Mikroverfahrenstechnik (IMVT)
Prüfungsdatum 13.11.2020
Schlagwörter Polytropic microreactor for methanation, Methanation of CO/CO2 mixtures, CFD simulation of microreactor, CFD simulation of packed bed
Referent/Betreuer Pfeifer, P.
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