In:
ChemPlusChem, Wiley, Vol. 86, No. 6 ( 2021-06), p. 889-903
Abstract:
Direct methanation of CO 2 over ceria‐ and alumina‐supported nickel catalysts in the feed stream containing methane and traces of H 2 S is reported. Stability tests for 20 h at 350 and 600 °C with a packed‐bed reactor showed high resistance of the catalysts to sintering processes. Higher conversion at 350 °C was observed for ceria supported nickel catalyst. Thermodynamic analysis indicated that CO 2 contained in biogas can be converted to methane without carbon formation under specific reaction conditions. An introduction of CH 4 to CO 2 −H 2 feed stream led to the decrease in CO 2 conversion and CH 4 selectivity. An introduction of the trace amounts of H 2 S into the feed stream led to the fast drop of CO 2 conversion and CH 4 selectivity; higher durability (20 %) was observed for Al 2 O 3 than CeO 2 supported catalysts. An improved performance of catalysts coated onto high‐pressure microchannel microreactors for the direct CO 2 methanation reaction applying model biogas mixture was demonstrated.
Type of Medium:
Online Resource
ISSN:
2192-6506
,
2192-6506
DOI:
10.1002/cplu.202100196
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2646595-4
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