微球型蒽醌加氢钯催化剂的制备和性能

以氯化钯为前驱体，活性氧化铝为载体，采用等体积浸渍法制备蒽醌加氢流化床Pd/Al₂O₃催化剂，系统考察了浸渍条件、焙烧条件、还原条件对催化剂表面性质和加氢性能的影响。结果表明，浸渍液pH值和焙烧温度是影响Pd分散度和催化剂活性的主要因素。优化的催化剂制备条件为：浸渍液pH值3.0~4.0，浸渍时间0.5 h，干燥温度120 ℃，干燥时间2 h，焙烧温度500 ℃，焙烧时间2 h，还原温度100 ℃，还原时间4 h。在催化剂质量分数0.27%、反应温度58 ℃，反应压力0.3 MPa条件下，催化蒽醌加氢反应15 min后，反应体系氢效可达10.3 g/L。

Preparation and Hydrogenation Performance of Microsphere Palladium Catalysts for Anthraquinone Hydragenation

Pd/Al₂O₃ catalyst for anthraquinone hydrogenation in fluidized bed reactor was prepared by equal volume impregnation method using palladium chloride as precursor and active alumina as carrier. Effects of impregnation conditions, calcination conditions and reduction conditions on the surface properties and hydrogenation performance of the catalysts were systematically investigated. Results show that the pH value of impregnation solution and calcination temperature are the main factors affecting the dispersion of Pd and the catalytic activity. The optimum conditions for the catalyst preparation are listed as follows: pH value of impregnation solution of 3.0-4.0, impregnation time of 0.5 h, drying temperature of 120 ℃, drying time of 2 h, calcination temperature of 500 ℃, calcination time of 2 h, reduction temperature of 100 ℃, and reduction time of 4 h. Under the reaction temperature of 58 ℃, pressure of 0.3 MPa and catalyst mass fraction of 0.27%, the hydrogenation efficiency reaches 10.3 g/L after 15 min.