Mechanism of Cobalt-Catalyzed CO Hydrogenation: 1. Methanation.
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ABSTRACT: The mechanism of CO hydrogenation to CH4 at 260 °C on a cobalt catalyst is investigated using steady-state isotopic transient kinetic analysis (SSITKA) and backward and forward chemical transient kinetic analysis (CTKA). The dependence of CH x residence time is determined by 12CO/H2 → 13CO/H2 SSITKA as a function of the CO and H2 partial pressure and shows that the CH4 formation rate is mainly controlled by CH x hydrogenation rather than CO dissociation. Backward CO/H2 → H2 CTKA emphasizes the importance of H coverage on the slow CH x hydrogenation step. The H coverage strongly depends on the CO coverage, which is directly related to CO pa
SUBMITTER: Chen W
PROVIDER: S-EPMC5716442 | biostudies-literature | 2017 Dec
REPOSITORIES: biostudies-literature
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