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CO 2 Conversion by Fischer‐Tropsch Synthesis Using Na‐Modified Fe Catalysts
Author(s) -
Schmidt Christian,
Kureti Sven
Publication year - 2022
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.202200067
Subject(s) - fischer–tropsch process , catalysis , selectivity , dissociation (chemistry) , water gas shift reaction , carbide , chemistry , syngas , chemical engineering , tandem , inorganic chemistry , materials science , organic chemistry , engineering , composite material
Three Fe catalysts with different Na contents were prepared, characterized, and investigated for the CO 2 ‐based Fischer‐Tropsch synthesis (FTS). The FTS results clearly indicated that the selectivity towards long‐chain hydrocarbons was driven by the surface Na content, which promotes the CO dissociation and chain propagation. Additionally, it was shown that Fe 3 O 4 , Fe 5 C 2 and Fe 7 C 3 coexist during FTS, revealing specific catalytic activity. As a result, a tandem mechanism was suggested for the CO 2 conversion, consisting in a reverse water‐gas shift on Fe 3 O 4 followed by CO hydrogenation on the Fe carbides.