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文章采用碱性水热晶化法制备MCM-41介孔分子筛为载体,用浸渍法将非贵金属Ni和12-硅钨杂多酸(HSi W)固载于分子筛上,制备得Ni-HSi W/MCM-41金属-酸双功能催化剂作为新型的长链烷烃异构化催化剂。研究了Ni-HSi W/MCM-41双功能催化剂在常压固定床反应器上,以正庚烷异构化反应为探针反应,催化剂在不同制备条件下的催化性能。结果表明催化剂在一定还原条件和反应条件下当Ni固载量为4 wt.%、HSi W固载量为30%,催化剂的焙烧温度为400℃时是最佳制备条件。
In this paper, MCM-41 mesoporous molecular sieve was prepared by alkaline hydrothermal crystallization method. Ni-HSi W was prepared by impregnating non-noble metal Ni and 12-Si heteropoly acid (HSi W) / MCM-41 metal-acid bifunctional catalyst as a new long-chain paraffin isomerization catalyst. The catalytic performance of Ni-HSi W / MCM-41 bifunctional catalyst on n-heptane isomerization reaction and catalyst under different preparation conditions was investigated in an atmospheric fixed-bed reactor. The results show that under the conditions of reduction and reaction, the optimum conditions for the preparation of catalyst are as follows: Ni loading 4 wt.%, HSi W loading 30%, catalyst calcination temperature 400 ℃.