【摘要】 微波辐照下（Ｂｉ_２Ｏ_３）_０．８（Ｌａ_２Ｏ_３）_０．２固熔体对甲烷氧化偶联的催化行为陈长林，洪品杰，戴树珊，阚家德（云南大学化学系，昆明，６５００９１）关键词微波，甲烷氧化偶联，（Ｂｉ_２Ｏ_３）_０．８（Ｌａ_２Ｏ_３）_０．２甲烷氧化...更多还原

【Abstract】 The catalytic behaviour of oxidative coupling of methane over solid solution (Bi2O3)0.8(La2O3)0.2 under microwave irradiation was investigated. Compared with the classical method, the application of microwave irradiation appears to have beneficial effects : (1)When methane conversion reaches the sarne level, under microwave irradiation, the temperature of catalytic bed is much lower than conventional heating mode. We propose that this is due to "microwave hot spot effect" which generated by localized coupling of microwave energy to point defects or weak-bond surface, and the "microwave hot spots" are just the activecenters for the production of methyl radicals. (2) Under microwave irradiation, CO2 can be suppressed to some extent at lower methane conversion level, while CO can be suppressed to some extent at higher methane conversion level. (3) Under microwave irradiation, the ratio of C2H2/C2H6 was lower, while C2-selectivity was higher.更多还原