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.
出处
《应用化学》
CAS
CSCD
北大核心
1996年第3期105-106,共2页
Chinese Journal of Applied Chemistry
关键词
气流粉碎
分子筛
酸中心
催化性能
裂解
air stream pulverization
zeolite
acid center
catalysis property
cracking
