| 查看: 890 | 回复: 4 | |||
| 当前主题已经存档。 | |||
yihanfan金虫 (小有名气)
|
[交流]
ZSM-5如何制备HZSM-5
|
||
|
ZSM-5如何制备HZSM-5？ 想请教一下，是否将ZSM-5浸渍于铵离子溶液中可以将其转变为HZSM-5. |
回复此楼» 猜你喜欢
焙烧后的拉西环状铁钼催化剂侧面硬度高，应该如何降低？
已经有1人回复
-
欢迎来稿
已经有213人回复
-
化学工程及工业化学论文润色/翻译怎么收费?
已经有152人回复
-
双一流大学湘潭大学“化工过程模拟与强化”国家地方联合工程研究中心招收博士生
已经有52人回复
-
大连海事大学国家级人才团队（船舶洁净能源研究中心）2027年博士研究生招生启事
已经有1人回复
-
中国地质大学杨明教授组招收2027年博士能源化学、催化材料方向（每月5K+）
已经有56人回复
-
中国地质大学杨明教授组招收2027年博士能源化学、催化材料方向（每月5K+）
已经有58人回复
-
东南大学杰青团队-催化方向硕博士生、博士后、科研助理招募
已经有0人回复
zds1301
铁杆木虫 (著名写手)
- 应助: 1 (幼儿园)
- 金币: 9018.6
- 散金: 10
- 帖子: 2771
- 在线: 216小时
- 虫号: 470295
- 注册: 2007-11-29
- 性别: GG
- 专业: 绿色有机化学
2楼2008-05-25 22:12:13
yihanfan
金虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 1238.4
- 散金: 4
- 帖子: 273
- 在线: 62.1小时
- 虫号: 345850
- 注册: 2007-04-14
- 专业: 无机合成和制备化学
3楼2008-05-25 22:18:42
zds1301
铁杆木虫 (著名写手)
- 应助: 1 (幼儿园)
- 金币: 9018.6
- 散金: 10
- 帖子: 2771
- 在线: 216小时
- 虫号: 470295
- 注册: 2007-11-29
- 性别: GG
- 专业: 绿色有机化学
★
^_^@^_^(金币+1,VIP+0):多谢！
^_^@^_^(金币+1,VIP+0):多谢！
|
给你个文献, Applied Catalysis A: General 185 (1999) 41–52 ZSM-5 zeolite with enhanced acidic properties R. Le Van Mao , T.S. Le, M. Fairbairn, A. Muntasar, S. Xiao, G. Denes Concordia University, Department of Chemistry and Biochemistry and Laboratories for Inorganic Materials, 1455 De Maisonneuve West, Montreal, Que. H3G 1M8, Canada Received 27 January 1999; accepted 31 March 1999 Abstract ZSM-5 zeolite, when doped with fluorine species in relatively low concentration using ammonium fluoride as precursor, and subsequently activated stepwise at high temperature, shows an enhanced surface acidity because of: (i) the formation of new Bronsted acid sites; and (ii) the strengthening of some acid sites of the parent zeolite. This is ascribed to the proton attack of the zeolite surface by the chemisorbed HCF− ion pair. Under these preparation conditions, the zeolite structure is fully preserved. Such enhanced acid properties are traduced by a significant increase in the yield of methyl tert-butyl ether (gas phase reaction). ©1999 Elsevier Science B.V. All rights reserved. Keywords: ZSM-5 zeolite; Mild doping with F and subsequent stepwise activation at high temperature; Enhanced acidic properties; Enhanced activity in the MTBE synthesis 1. Introduction 2. Experimental 2.1. Catalyst preparation (i) The acid form of the H-ZSM5 was prepared by repeated ion exchange of the commercially available Na-ZSM5 zeolite (Zeocat PZ 2/30, Na form, powder, Chemie Uetikon, Switzerland) with a 10 wt.% solution of ammonium chloride at 80C with stirring. Each treatment lasted for 1 h, after which the used solution was decanted and fresh solution added (1 g of zeolite in 10 ml solution). The procedure was repeated 4–5 times, after which the solid was washed on the filter several times with water and dried at 120C. The acid form was generated by activation at 450C in air overnight. The final catalyst (extrudates), hereafter referred to as H-ZSM5, was obtained |
4楼2008-05-26 09:13:59
ydx19
铁杆木虫 (知名作家)
- 应助: 11 (小学生)
- 金币: 6418.9
- 散金: 105
- 红花: 5
- 沙发: 5
- 帖子: 5178
- 在线: 179.5小时
- 虫号: 301512
- 注册: 2006-11-30
- 专业: 电化学
5楼2008-05-31 14:33:21