考察了氧气气氛下 ,活化前后分别用H2 处理 0 5h对Mo/HZSM 5催化剂反应活性的影响 .结果表明 :活化后用H2 处理后催化活性显著降低 .甲烷添加O2 ,CO2 后 ,于 70 0℃时进行氧化反应 ,无苯生成 ;75 0℃时甲烷与O2 反应在进行氧化反应的同时 ,有偶联反应发生 .反应温度的提高使甲烷转化率与苯的选择性均有提高 ,但催化剂稳定性下降 ,可能归结为积炭增加和钼组分的挥发流失 . The effect of H2 treatment on the reactivity of Mo / HZSM 5 catalyst was investigated in the presence of oxygen for 0 5 h. The results showed that the catalytic activity of the catalyst was significantly decreased after the treatment with H2. After the addition of O2 and CO2 to methane, At 75 0 ℃, the reaction of methane with O 2 proceeds in the oxidation reaction and the coupling reaction takes place at the same time. The increase of reaction temperature increases both the conversion of methane and the selectivity of benzene, but the stability of the catalyst The decline may be attributed to increased coke deposition and loss of volatility of molybdenum components.