Diffusive catalytic combustion burner. (III).

概要

論文の詳細を見る
Kinetic studies of methane in a microreactor were carried out to clarify the reaction mechanism of a diffusive catalytic combustion burner for city gas using a combustion catalyst composed of porous alumina fibers impregnated with rhodium. Fresh catalysts, H<SUB>2</SUB>S treated catalysts and life test catalysts were all tested in oxidation, steam reforming and cracking reactions under conditions similar to those of the burner. The results show that there are two kinds of oxidation mechanisms: one is complete oxidation under high oxygen pressure in which oxygen is dissociatively adsorbed over rhodium, the other is partial oxidation under a lower oxygen pressure in which highly active oxygen interacts with rhodium to produce CO and H<SUB>2</SUB>. The partial oxidation is assumed to be the predominant methane reaction within the burner because of its high rate. Since any steam reforming reaction was perfectly poisoned by sulfur and a carbon-producing cracking reaction was not observed, these two reactions are assumed to be unimportant in the burner.
一般社団法人日本エネルギー学会の論文