Catalytic oxidation of methane over palladium supported on alumina: Influence of the oxygen-to-methane ratio

✍ Scribed by Najat Mouaddib; Christiane Feumi-Jantou; Edouard Garbowski; Michel Primet

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 818 KB
• Volume: 87
• Category: Article
• ISSN: 0926-860X
• DOI: 10.1016/0926-860x(92)80177-e

✦ Synopsis

The oxidation of methane over a Pd/A1203 catalyst was studied for oxygen-to-methane ratios ("r") varying from 4 to 0.66. After aging under the reactants mixture at 600°C an increase in the catalytic activity was observed whatever the "F" value. In addition, the selectivity of the reaction depends on the oxygen-to-methane ratio. In oxygen deficient mixtures, the formation of carbon monoxide was observed at conversion levels corresponding to the total oxygen consumption. Palladium supported on alumina was found to be active in the methane steam reforming reaction at moderate temperature. This reaction was proposed to be responsible for carbon monoxide formation in the case of methane oxidation in lean mixtures.