| 查看: 716 | 回复: 6 | ||
| 【奖励】 本帖被评价3次，作者buffaloli增加金币 3 个 | ||
[资源]
【资源】Preparation of zeolite catalysts 已有3人参与
|
||
|
最近读了几篇分子筛催化的基本、重要文献，大家分享 Zeolite catalysts are successfully applied in hydrocarbon processing and in chemical conversion processes. Properties which make zeolites versatile catalyst components are: Size and shape of the crystallites are variables in catalyst design and are determined by the synthesis conditions. The internal surface area is high and thermally very stable compared to those of the amorphous silicas and aluminas used traditionally in catalyst preparation. The pores are well defined and of molecular dimensions, the pore size is determined by the crystallographic structure. The pore openings ruling the accessibility of the internal surface may be subtly changed by ion-exchange, postimpregnation or chemical reaction with specific compounds, (pore size engineering). Charge-compensating cations can be removed by ion-exchange. T-atoms are in most structures highly accessible, their nature determines the polarity of the surface and its catalytic activity. The chemical composition of the lattice is dependent on the synthesis conditions. In many cases the Si/AI ratio may be varied within wide limits and for some structures also the nature of the T-atoms is a variable. The chemical composition of the lattice may be changed by the application of the various techniques for dealumination- and T-site substitution reactions (secondary synthesis), as a side effect a profound change in the texture of the zeolite may occur by the formation of mesopores. The catalytic activity of the surface of a zeolite can be modified by a treatment with a reactive chemical and this modification may be limited to the outersurface of the crystals by selection of a reagent, which due to its size, cannot reach the internal surface. 易盘下载: http://www.163pan.com/files/80100160h.html 文件名称: PREPARATION OF ZEOLITE CATALYSTS.pdf ============================== [ Last edited by buffaloli on 2010-6-5 at 09:48 ] |
回复此楼» 猜你喜欢
国家工程物理交叉科学研究中心招收凝聚态物理及相关专业硕士研究生一名
已经有17人回复
-
数二英语一的 理工科 求调剂
已经有0人回复
-
物理化学论文润色/翻译怎么收费?
已经有295人回复
-
大连工业大学招硕士研究生
已经有0人回复
-
大连工业大学招硕士研究生
已经有0人回复
-
数二 英语一，求调剂，本科学校福建农林大学
已经有1人回复
-
大连工业大学招硕士研究生
已经有0人回复
-
关于研究生调剂的些许建议
已经有1人回复
-
辽宁：大连工业大学，文字为导师详细信息，图片为团队介绍，欢迎报名
已经有0人回复
-
武汉轻工大学化环学院招收调剂
已经有6人回复
-
求电子书《环糊精化学 : 基础与应用》
已经有0人回复
» 本主题相关商家推荐: (我也要在这里推广)
» 本主题相关价值贴推荐，对您同样有帮助:
- 求期刊的卷号怎么找
已经有4人回复
- 09年晶体牛人名家实验室链接介绍(回帖有金币)
已经有161人回复
2楼2010-06-05 16:35:16
谢谢！ 3楼2010-06-05 17:16:38
4楼2010-06-05 17:42:15
5楼2010-06-06 09:12:46
简单回复
buct_xjq6楼
2010-06-09 09:17
回复
2010-06-09 14:03
回复
感谢分享！
10