考察了没有固体催化剂时NOx对甲烷气相氧化的催化作用,并用原位红外光谱研究了CH4-O2-NOx体系随温度的变化. 实验结果表明,NOx对甲烷气相氧化有很高的催化活性. 在20%CH4-10%O2体系中加入0.05%～0.2%的NO后,反应温度可降低200～300 ℃,在650～700 ℃下反应时,CH4转化率和CO选择性可分别达到38%和90%,产物中的n(H2)/n(CO)比为0.4～0.7. 反应产物中可观察到有甲醛、甲醇和乙烯等,通过改变反应条件可以控制各组分的相对浓度.
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