摘要
使用碱处理脱硅法制备了含介孔ZSM-5沸石催化剂.碱处理温度越高、时间越长,在ZSM-5沸石中引入介孔越多.在该低硅ZSM-5沸石改性过程中观察到脱硅过程中伴随脱铝现象,表现为在介孔大量生成的同时,沸石硅铝比仅小幅下降,且NH_3-TPD测试表明酸性位数量明显下降.该微介孔ZSM-5沸石催化剂被应用于甲醇制丙烯(MTP)反应中并展现出良好的催化稳定性.
Alkaline treatment desilication has been employed to prepare mesopore containing zeolite ZSM-5 catalyst. With the increasing treatment temperature and prolonging treatment duration, the rise in the introduced mesopore volume has been observed. Desilication has been found to occur along with the desilication process, which is suggested by the slight decrease in the Si/A1 ratio of zeolite ZSM-5 after remarkable desilication as well as the decreased acid quantity demonstrated by NHa-TPD. The prepared mesopore containing ZSM-5 catalyst shows noticeable enhancement in catalytic stability in methanol to propylene reaction.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2012年第5期559-565,共7页
Journal of Fudan University：Natural Science
基金
国家自然科学基金资助项目(20890122)
上海市科学技术委员会(08DZ2270500
09DZ2271500)
国家重点基础研究发展计划"973"资助项目(2009CB623506
2009CB930400)
关键词
碱处理
脱硅
介孔
ZSM-5
甲醇制丙烯
alkaline treatment
desilieation
mesopore
ZSM-5
methanol to propylene
