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采用浸渍法制备了Ni/CaO-γ-Al2O3系列催化剂,并通过固定床连续反应考察了催化剂在CH4-CO2重整反应中的活性。结果表明:CaO助剂的加入能提高Ni基催化剂的活性,以CaO含量5%为最佳;采用共浸渍法制得的催化剂活性较高;焙烧温度723 K和还原温度823 K时催化剂活性较高;使用最佳条件下制得的催化剂,973 K下进行CH4-CO2重整反应,总碳转化率达到83.4%。
Ni / CaO-γ-Al2O3 series catalysts were prepared by impregnation method, and the activity of the catalyst in the CH4-CO2 reforming reaction was investigated by a fixed bed continuous reaction. The results show that the addition of CaO can improve the activity of Ni-based catalyst, and CaO content of 5% is the best. The activity of catalyst prepared by co-impregnation is high. The activity of catalyst is higher when the calcination temperature is 723 K and the reduction temperature is 823 K Under the optimal conditions, the CH4-CO2 reforming reaction was carried out at 973 K, and the total carbon conversion reached 83.4%.