采用等体积浸渍法在Ni基催化剂上添加W助剂制备Ni/W-Al₂O₃催化剂，探究Ni负载量、W摩尔分数和焙烧温度对催化剂CO选择性甲烷化的影响。利用XRD、N₂-物理吸附、H₂-TPR、NH₃-TPD、CO₂-TPD、TEM等对催化剂进行表征。结果表明，有W的催化剂在低温下活性很差，不能提高活性。在Ni负载量为20%、W摩尔分数为0.05、焙烧温度为900℃、空速为4 800 h^-1的条件下，反应温度在207~339℃范围内，20% Ni/0.05W-Al₂O₃-900℃催化剂能使CO出口体积分数始终小于10 μL/L，CH₄出口体积分数小于2%。

Ni/W-Al₂O₃ catalyst is prepared through equal volume impregnation method with adding W additive onto Ni-based catalyst, and the effects of Ni loading, W content and calcination temperature on CO selective methanation of catalyst are investigated.The prepared catalyst is characterized by means of XRD, N₂-physical adsorption, H₂-TPR, NH₃-TPD, CO₂-TPD and TEM.Results show that the catalyst with W has poor activity at low temperature, so the activity cannot be improved.The 20% Ni/0.05W-Al₂O₃-900℃ catalyst can always keep CO concentration at outlet less than 10 ppm and CH₄ concentration at outlet less than 2% when the loading amount of Ni is 20%, the molar fraction of W is 0.05, the calcination temperature of catalyst is at 900℃, the space velocity is 4 800 h^-1, and reaction temperature is in the range of 207-339℃.

夏勇辉(1996-),男,硕士研究生,研究方向为富氢气体中微量一氧化碳的脱除,Summeryonghui@163.com。