采用浸渍-还原法制备的Ni/MgO/Al2O3在CH4与CO2重整制合成气反应中显示出良好的催化性能和一定的抗积炭能力;在1 023 K下流动反应气氛中连续运转100 h,未见活性下降,CH4及CO2转化率均为90%左右,CO收率高于90%.实验还发现,CH4转化率随着原料气中CO2浓度的增加而升高,当V(CO2)/V(CH4)=2时,CH4转化率可达1100%.通过BET比表面积测定及XRD,TEM等分析手段,比较了浸渍-还原和浸渍-焙烧-还原两种制备方法对催化剂活性的影响.结果表明,与浸渍-焙烧-还原法相比,浸渍-还原法制备的Ni催化剂在载体表面的分散更好,活性更高.
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