Elementary Processes in the Catalytic Combustion of Methane (Mechanism, Intermediates, and Controlling Reactions). Final Report October 1981-December 1985

摘要

Three transition metals (Ni, Ir and Pt) were studied as catalysts for the oxidation of methane. These metals were chosen because of their different reactivities toward oxygen and hydrocarbons. The evaluation of their catalytic properties for methane oxidation was based on specific catalyst activity for complete oxidation, susceptibility to poisoning by sulfur compounds during catalytic reaction, quantitative reaction kinetics, formation of partially oxidized products, and effect of gaseous additives on methane oxidation. The experimental results demonstrated the superior performance of the noble-metal (NM) catalysts (Pt and Ir) over the base-metal (BM) catalyst (Ni). The NM catalysts combine high specific activity for oxidation of both methane and sulfur compounds making them the most suitable candidates for natural gas combustion without loss in activity caused by sulfur compounds used as odorants in the feed stream.