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Mechanism of the potassium catalysed gasification of carbon in CO2

โœ Scribed by Jacob A. Moulijn; M.B. Cerfontain; Freek Kapteijn

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
589 KB
Volume
63
Category
Article
ISSN
0016-2361

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โœฆ Synopsis

The literature on the potassium catalysed gasification of carbon in CO2 is critically reviewed with respect to the mechanism and the experimental 'facts' relevant to the mechanistic considerations. It is concluded that bulk intercalation compounds (CsK, r&K, etc.) are not present under gasification conditions; also other metallic K-species are not the major species during gasification. It is shown that the catalytic activity can be attributed to an oxygen transfer cycle with either reduction of carbon or decomposition of the oxygenated complexes as the rate determining step. In this catalytic cycle only oxidic potassium species are involved.

๐Ÿ“œ SIMILAR VOLUMES

Kinetics of the potassium carbonate-cata
Kinetics of the potassium carbonate-catalysed CO2 gasification of activated carbon
โœ Freek Kapteijn; Jacob A. Moulijn ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 721 KB

In this study reaction rate data are presented of potassium carbonate-catalysed CO, gasification of an activated carbon, measured in a Packed Bed Balance Reactor over a CO2 pressure range of 0.05-2.03 MPa at 1050 K. As a result of CO inhibition the reactor only behaves differentially at CO, conversi

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Kinetics of catalyst loss during potassium-catalysed CO2 gasification of carbon
โœ David A. Sams; Tevan Talverdian; Farhang Shadman ๐Ÿ“‚ Article ๐Ÿ“… 1985 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 755 KB

A significant fraction of the potassium catalyst can be lost by vaporization during catalysed carbon gasification. The extent of this loss depends primarily on the reaction start-up procedure. Temperature programmed experiments show that, under inert atmospheres, both KOH and K,CO, react with carbon