Review of General Mechanisms for the Gas-Carbon Reactions

A large amount of evidence has been accumulated which shows that one of the steps involved in a gas-carbon reaction is the chemisorption of the 

In chemisorption, it is known that the surface atoms must have free valence electrons in order to form strong chemical bonds with gas molecules or atoms. Much recent work (15-18) using electron paramagnetic resonance absorption techniques has confirmed the presence of unpaired 

Lewis and co-workers (S3) investigated the oxidation of carbon at a total pressure of 1.1 atm. in a fluidized bed. They confirm that carbon dioxide is a primary product of carbon oxidation, but find that the CO-CO2 ratio is essentially constant below 520° and is equal to ca. 0.3. According to Equation (1), the CO-CO2 ratio at 520° should be ca. 0.9. In agreement with Arthur s findings, Lewis and co-workers report that the CO-CO2 ratio is relatively independent of the carbon types which they used—hardwood charcoal, metallurgical coke, and natural graphite. 

Arthur and co-workers (34) have made a study of a number of inhibitors 

Carbon dioxide, as well as carbon monoxide, is a primary product of carbon oxidation. 

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