On the activity of Fischer-Tropsch and methanation catalysts: A study utilizing isotopic transients

Autor:	W.M.H. Sachtler, J.N. Helle, F. G. A. van den Berg, P. Biloen
Rok vydání:	1983
Předmět:	Chemical engineering Methanation Chemistry Kinetic information Inorganic chemistry Fischer–Tropsch process Context (language use) Reaction intermediate Physical and Theoretical Chemistry Catalysis Relaxation behavior Overlayer
Zdroj:	Journal of Catalysis. 81:450-463
ISSN:	0021-9517
DOI:	10.1016/0021-9517(83)90183-5
Popis:	Stepwise switches from a 12 CO H 2 to a 13 CO H 2 feed and vice versa have been utilized to obtain transient kinetic information without disturbing the steady-state catalysis. In the context of methanation and Fischer-Tropsch catalysis it emerges that of the large carbidic overlayer which develops only a small part belongs to reaction intermediates proper. Under the prevailing conditions the fractional coverage in growing chains is low and, consequently, the chain growth relatively fast i.e., not rate-determining. Details in the relaxation behavior are suggestive of intermediates that are carbidic in nature.
Databáze:	OpenAIRE
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