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考察了CH4+O2 ,NO +CH4(+O2 )与NO2 +CH4(+O2 )反应体系中CH4的转化活性 .结果表明 ,浸渍法制备的In/HZSM 5催化剂上CH4选择还原NO过程中 ,NO2 的形成起到了活化甲烷的作用 .根据NO和NO2 在In/HZSM 5与HZSM 5样品上的TPD及IR研究结果 ,认为在载体HZSM 5的酸性位及In/HZSM 5催化剂的活性中心In位上均可形成NO2 ,NO2 与CH4的反应在In位上进行 .
The conversion of CH4 in CH4 + O2, NO + CH4 (+ O2) and NO2 + CH4 (+ O2) reaction system was investigated.The results showed that during the selective reduction of NO over In / HZSM5 catalyst prepared by impregnation, NO2 According to the results of TPD and IR of NO and NO2 on In / HZSM 5 and HZSM 5 samples, it is considered that in the acidic sites of carrier HZSM 5 and In sites of the active center of In / HZSM 5 catalyst Can form NO2, NO2 and CH4 reaction in the In position.