Catalytic cracking of 1-butene to propylene by Ag modified HZSM-5  

Ag修饰的HZSM-5催化1-丁烯裂化制备丙烯（英文）

作　　者：张荣荣 王正宝 

机构地区：[1]College of Chemical and Biological Engineering, Zhejiang University

出　　处：《Chinese Journal of Chemical Engineering》2015年第7期1131-1137,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Science Foundation of China(U1162129);the Science and Technology Department of Zhejiang Province(2009R50020)

摘　　要：Silver modified HZSM-5 （AgHZ） zeolite catalysts were prepared by ion exchange method and their catalytic properties in the l-butene cracking reaction were measured. The catalysts were characterized by infrared spec- troscopy with pyridine adsorption （Py-IR）, N2 adsorption and X-ray diffraction （XRD）. The effects of Ag loading and steaming treatment on catalytic performances were studied. It is found that the activity ofHT_SM-5 （HZ） catalyst significantly decreases with the steaming time, whereas AgHZ catalysts show stable activity in the steaming time of 24-48 h and their activities increase with the Ag loading. When the steaming time is 24-48 h, the yield of propylene over HZ catalyst significantly decreases, whereas it is stable over AgHZ catalysts. The AgHZ catalysts with Ag loadings of 0.28%-0.43% （by mass） show similar propylene yields （-30%）, which are higher than that over the AgHZ catalyst with a Ag loading of 0.55% （by mass）. These results indicate that the steam-treated AgHZ catalysts with optimum Ag loadings have higher yield of propylene and are more stable than the steam- treated HZ catalyst. The regeneration stability measurement in butene cracking also shows that the AgHZ catalyst steam-treated under a suitable condition has better stability than the HZ catalyst.

关 键 词：1-8utene Propylene Cracking HZSM-5 Zeolite Silver 

分 类 号：TQ221.212[化学工程—有机化工]