冷冻干燥法制备的高比表面催化剂

• 作 者: 戎晶芳
• 机 构: 中国科学技术大学近代化学系,
• 出 处: 石油化工
• 发表日期: 1981年05期
• 关键词: 催化剂 比表面 冷冻干燥法 贵金属催化剂 焙烧温度 催化活性 共沉淀 排气净化 冷冻干燥 氧化物

报道一种制备催化剂的新方法——冷冻干燥法。用此法制取了三类稀土复合氧化物——一种有希望代替铂、钯等贵金属催化剂用于汽车排气净化的新型催化剂。冷冻干燥法制得的催化剂与共沉淀法制得的催化剂相比具有焙烧温度低,比表面大(提高6.3—17倍),活性高,催化活性受空速影响小等突出优点。

Reported a new method for preparing catalyst - freeze-drying method. Using this method three types of rare earth composite oxide - a promising alternative to platinum, palladium and other precious metal catalysts for automotive exhaust purification of the new catalyst. Compared with the catalyst prepared by coprecipitation method, the freeze-dried catalyst has the prominent advantages of low calcination temperature, large specific surface area (6.3-17 times higher), higher activity and less catalytic activity affected by airspeed.