Carbon-carbon dioxide reaction: Langmuir-Hinshelwood kinetics at intermediate pressures

✍ Scribed by J.F. Strange; P.L. Walker Jr.

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 692 KB
• Volume: 14
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(76)90008-7

✦ Synopsis

Abstraet-The gasification of a very high purity natural graphite was studied at temperatures between 900 and 1007"C, at total gas pressures between 1.5 and 150 torr, and CO/CO, ratios between 0.098 and 2.0. Reactivity, expressed as weight loss per unit time, was constant over the bum-off range between about l&50%. Rates of gasification were seen to obey the equation derived from Langmui-Hinshelwood theory, that is Rate = k,pco,/(l + k2pC0 t k3pco,). If it is assumed that the inhibition of gasification by CO is caused by its lowering the steady-state concentration of oxygen complex which breaks down to product CO, individual rate constants for the oxygen transfer and gasification steps can be= calculated. Values of these rate constants and the equilibrium constant for the oxygen transfer step are considered in the light of literature results and theory.