SYNTHESIS OF C_(2+) HYDROCARBONS AND SYNGAS BY GAS PHASE METHANE OXIDATION UNDER PRESSURE

摘要

Oxidative coupling of methane was conducted in the non-catalyzed gas phase system under pressurized conditions. Both partial pressures of oxygen and methane showed marked effects on either reaction rate or product selectivity. Low oxygen pressure was essential for high C2+ selectivity. Additives such as CHC12CHC12, H2S, CH,COCHS, CO2 promoted C2+ yield and the promoting mechanism seems different among these promoters. The carbon dioxide seemed to promote the reaction by the third body effects, without lowering the selectivity of C24 hydrocarbons.