The combustion of methane on platinum—alumina fibre catalysts—I: Kinetics and mechanism

✍ Scribed by David L. Trimm; Chi-Wai Lam

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 842 KB
• Volume: 35
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(80)85134-7

✦ Synopsis

As a part of a study of a convectwe-drffuswe type catalytic combustor, the oxldatlon of methane has been studed over platmum supported on porous and non-porous alumma fibre New and used catalysts have been carefully characterlsed, and the kmetlcs of the reaction have been measured at temperatures above and below 815 K, where a change m the apparent actwation energy was found to occur Companson mth Langmuir-Hmshelwood models suggests that the mechanism mvolves the reactlon between adsorbed methane and oxygen adsorbed or m the gas phase This mechamsm IS supported by the charactensation studies, which also suggest that the formatlon of carbonaceous mtermedlates may affect the reaction sclectlvlty Permanent catalyst deactivation occurs as a result of the smtermg of platmum or of alumma, the latter e&t IS accelerated I; the presence of steam