喷雾分散-油柱成型法制备微球形氧化铝及其蒽醌加氢性能

以铝溶胶为原料,采用喷雾分散-油柱成型法制备系列微球形氧化铝载体,考察焙烧温度对载体结构的影响。结果表明,采用该方法制备的微球形氧化铝具有球形度高、表面光滑和抗磨损性能高的特点。以(45～75)μm微球形氧化铝颗粒为载体,制备负载型Pd催化剂,并应用于流化床蒽醌加氢反应,催化剂评价结果表明,催化剂氢化效率11.8 g·L^(-1),选择性大于97.5%,过氧化氢生产能力比工业用催化剂提高近6倍。

Preparation of micro spherical alumina by spray dispersion-oilcolumn drop method and its application in anthraquinone hydrogenation

A series of micro spherical alumina supports were prepared by spray dispersion-oil column drop method using alumina sol as raw material,and effects of calcined temperature on structure property of supports were also investigated.The results showed that the obtained micro spherical alumina support possessed high sphericity,smooth surface as well as high wear resistance.Moreover,supported Pd catalyst on these (45-75) μm spherical alumina was further prepared and tested in anthraquinone(eAQ) hydrogenation in fluidized bed reactor.The catalytic test showed that 11.8 g · L^-1 of hydrogenation efficiency and 97.5% of selectivity towards H₄eAQ were achieved on Pd/micro-spherical-alumina catalyst.H₂O₂ production capacity over Pd/micro-spherical-alumina catalyst was nearly 6 times higher than that over common commercial catalyst.