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以三种不同孔结构的γ-Al2O3为载体,采用等体积浸渍法制备Ni/γ-Al2O3催化剂,经低温氮气吸附、TPR、H2-TPD、XRD、TEM等物性结构表征及丁炔二醇催化合成1,4-丁二醇二段加氢性能评价结果表明,比表面积293m2.g-1、最可几孔径9.4 nm的γ-Al2O3制备的Ni/γ-Al2O3具有较高的分散度和较多的活性结构中心以及适宜的孔径分布(小于4 nm孔体积分数为12.34%、4~18 nm孔体积分数为64.42%、大于18 nm孔体积分数达23.24%),对丁炔二醇二段加氢表现出较高的加氢活性和稳定性.
The Ni / γ-Al2O3 catalysts were prepared by the same volume impregnation method using γ-Al2O3 with different pore structure as the support. The catalysts were characterized by low temperature N2 adsorption, TPR, H2-TPD, XRD and TEM, The results of the second-stage hydrogenation of 1,4-butanediol showed that the Ni / γ-Al2O3 prepared by γ-Al2O3 with the specific surface area of 293m2.g-1 and the most probable pore size of 9.4 nm has higher dispersity More active center and more suitable pore size distribution (smaller than 4 nm pore volume fraction of 12.34%, 4 ~ 18 nm pore volume fraction of 64.42%, greater than 18 nm pore volume fraction of 23.24%), the second paragraph of butynediol Hydrogenation shows higher hydrogenation activity and stability.