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xmclyn

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[交流] 有MCM-56吗?

听说MCM-56和ZSM-5的结构一样。
真是这样吗?

什么沸石结构与ZSM-5接近或类似?

[ Last edited by daiqiguang on 2007-5-10 at 18:20 ]
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zhangwengui330

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那肯定不一样的
MCM-56和MCM-2结构相近,只是层状间距更紧凑点
类似石墨结构
而ZSM-5是MFI结构,就像三根空心棍棍摆了个类似三位坐标轴类形式
不过不完全成直角
2楼2007-03-22 09:53:00
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daiqiguang

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In recent years, many modifications in the synthesis procedure and catalytic applications of MCM-22 have been published [1–4], while little is reported about the properties of MCM-56, especially the catalytic applications. Fung [4] first reported the synthesis of MCM-56. As MCM-56 and MCM-22 all share the MWW structure[5], MCM-56 exhibited some similarities with MCM-22, including the sinusoidal network channel and a large number of 12 MR cups exposed to the crystal exterior [6]. MCM-56 can be thermally treated without affecting its layered structure, while the structure of as-made MCM-22 changed markedly after calcinations. Large supercages with an inner diameter of approximately 0.71 nm and a height of 1.82 nm appear in calcined MCM-22 [7].

[ Last edited by daiqiguang on 2007-3-22 at 09:56 ]
有事请到www.chemj.cn上找chemj,谢谢
3楼2007-03-22 09:54:04
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xmclyn

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男怕优柔寡断,女怕矫揉做作

引用回帖:
Originally posted by zhangwengui330 at 2007-3-22 09:53:
那肯定不一样的
MCM-56和MCM-2结构相近,只是层状间距更紧凑点
类似石墨结构
而ZSM-5是MFI结构,就像三根空心棍棍摆了个类似三位坐标轴类形式
不过不完全成直角

有跟ZSM-5结构接近或者类似的没?
谢谢
4楼2007-03-22 09:55:01
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ycf2005

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Preparation, characterization of MCM-56 and catalytic activity in one-step synthesis of MIBK from acetone  • SHORT COMMUNICATION
Catalysis Communications, Volume 6, Issue 2, February 2005, Pages 107-111
Piao Ping Yang, Jian Feng Yu, Zhen Lü Wang, Mei Ping Xu, Qing Sheng Liu, Xu Wei Yang and Tong Hao Wu;
Characterization and catalytic properties of MCM-56 and MCM-22 zeolites  • ARTICLE
Microporous and Mesoporous Materials, Volume 40, Issues 1-3, November 2000, Pages 9-23
Gopalakrishnan G. Juttu and Raul F. Lobo;
Characterization and Catalytic Activity of MCM-22 and MCM-56 Compared with ITQ-2  • ARTICLE
Journal of Catalysis, Volume 191, Issue 1, 1 April 2000, Pages 218-224
A. Corma, U. Diaz, V. Fornés, J. M. Guil, J. Martínez-Triguero and E. J. Creyghton;
自己看看这些文献应该可以解决
5楼2007-03-22 09:55:28
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ycf2005

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版主们真是快的
6楼2007-03-22 09:56:48
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ycf2005

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你可看看ZSM-11,ZSM-11中也存在像MFI中有五硅链构成的平行于ac面呈波状的网层,与MFI不同的是,相邻的层之间不是以对称中心相关,而是以镜面相关。它和ZSM-5很容易产生混晶现象。
7楼2007-03-22 10:02:19
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daiqiguang

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wxwdoctor(金币+1):谢谢应助!
zsm-5

[ Last edited by daiqiguang on 2007-3-22 at 10:30 ]
有事请到www.chemj.cn上找chemj,谢谢
8楼2007-03-22 10:26:03
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