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制备了一系列Ni/AC催化剂,以α-羟基丙酮催化加氢制备1,2-丙二醇为目标反应,系统考察了Ni/AC催化剂的制备条件和反应工艺条件,结果表明催化剂的Ni负载量为15%,在550℃下煅烧4 h、H2气氛400℃还原4 h获得的催化剂为高分散的金属Ni物种,所得催化剂在质量空速1.4 h-1、反应温度280℃、α-羟基丙酮质量分数为50%的最优条件下,转化率达到了70.6%,1,2-丙二醇选择性为96.2%。
A series of Ni / AC catalysts were prepared. The target reaction of 1,2-propanediol with hydrogenation of α-hydroxyacetone was investigated. The preparation conditions and reaction conditions of Ni / AC catalysts were systematically investigated. The results showed that the Ni loading of catalyst was 15%, calcined at 550 ℃ for 4 h and reduced in H2 atmosphere at 400 ℃ for 4 h. The obtained catalysts were highly dispersed metal Ni species. The obtained catalysts were characterized with mass-space velocity of 1.4 h-1, reaction temperature of 280 ℃, mass of α-hydroxyacetone Under the optimal conditions of 50%, the conversion reached 70.6% and the selectivity of 1,2-propanediol was 96.2%.