为制备具有大比表面积和高金属分散度的复合催化剂，研究了水热沉淀法制备Ni-CaO/Al2O3复合催化剂的工艺条件，实验考察了制备反应温度、尿素溶液溶度和焙烧温度对复合催化剂比表面积和 Ni 金属分散度的影响。结果表明，反应温度150℃、尿素溶液浓度3 mol/L、焙烧温度500℃时得到的复合催化剂有最大的比表面积134.4 m2/g和最高的Ni金属分散度9.45%。将该条件下制备的复合催化剂应用于固定床反应吸附强化甲烷水蒸气重整过程制氢评价，在0.1 MPa，600℃，H2O/CH4物质的量比为4，体积空速340 h-1条件下，得到氢气浓度为97.5%，甲烷转化率95.3%，均高于文献已报道水平。%In order to preparation of sorption complex catalyst with a big surface area and high Ni dispersion, the synthesis conditions of hydrothermal precipitation method were investigated. The effect of preparation temperature, urea concentration and calcination temperature to the surface area and Ni dispersion of the sorption complex catalyst were investigated in details. The results showed that sorption complex catalyst with a surface area of 134.4 m2/g, and Ni dispersion of 9.45% under the optimal preparation temperature, urea concentration and calcination temperature were 150℃, 3 mol/L and 500℃ respectively. The catalyst was applied in ReSER process in a fix-bed reactor, under the operation conditions of 0.1 MPa, 600℃, steam methane molar ratio of 4, volumetric space velocity of 340 h-1. A H2 concentration of 97.5% and a CH4 conversion of 95.3% were obtained, which are both higher than the results reported.
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