分子筛的气流粉碎及其催化性能  

Influence of Air Stream Pulverization on the Surface Acid Center and Catalytic Property of Zeolite

作　　者：董为毅[1] 张文杰[2] 陶克毅[2] 苏明[2] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071 [2]南开大学化学系

出　　处：《应用化学》1996年第3期105-106,共2页Chinese Journal of Applied Chemistry

摘　　要：合成微颗粒分子筛在一些特征的催化反应中,如甲苯岐化、甲苯甲基化、二甲苯异构化,具有特殊的性质,其催化性能与微颗粒的外表面积及粒度大小密切相关.但其合成工艺较为复杂.用气流粉碎可以得到极小的微颗粒,工艺简单易行.将实验用分子筛经'世奇'气流磨粉碎后,用0.3 mol/L 盐酸溶液交换成氢型.The ZSM-5 and Y zeolites were pulverized by air stream to form fine particles. The particle size distribution,surface area,IR and TPD spectra were determined for both of the raw and fine particles.The catalytic activity of fine particle in cumene cracking was com- pared with the raw on pulse microreactor connected on line with a chromatograph.After ZSM-5 and Y zeolites being pulverized,their B and L acid amount increased and catalytic ac- tivity improved apparently.

关 键 词：气流粉碎 分子筛 酸中心 催化性能 裂解 

分 类 号：TQ424.25[化学工程] O643.36[理学—物理化学]