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采用常规的浸渍法制备了镍基催化剂和经过镧改性的镍基催化剂 ,研究了甲烷催化部分氧化制备含氮合成气的催化性能。结果说明 ,镍含量在 8%时催化活性达到最好 ,同时加入镧进行改性后催化剂的活性和选择性有所提高 ;该催化剂对甲烷空气催化部分氧化制合成气在常压下具有较高的转化率 ,随压力升高 ,转化率明显下降 ,并且积碳严重 ,通过向体系加入H2 O和CO2 可以提高加压条件下甲烷的转化率并抑制催化剂积碳 ,还可以获得H2 /CO接近 2的合成气 ,满足合成液体燃料的要求
Nickel-based catalysts and nickel-based catalysts modified by lanthanum were prepared by conventional impregnation method. The catalytic performance of partial oxidation of methane to nitrogen-containing synthesis gas was studied. The results show that the catalytic activity is best when the nickel content is 8%, and the activity and selectivity of the catalyst are improved after the addition of lanthanum. The catalytic partial oxidation of methane with air to synthesis gas at atmospheric pressure has higher Of the conversion rate, with the pressure increased, the conversion rate decreased significantly, and serious carbon deposition, by adding H2 O and CO2 to the system can increase methane conversion under pressure and inhibit the catalyst carbon deposition, but also can get H2 / CO close to 2 syngas to meet the requirements of synthetic liquid fuels