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| Modelling of dealumination of silicon-aluminum molecular sieves |
| MA Guangwei; XIE Zaiku |
| Shanghai Research Institute of Petrochemical Technology; SINOPEC. Shanghai 201208 |
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Cite this article:
MA Guangwei XIE Zaiku. Modelling of dealumination of silicon-aluminum molecular sieves. Chin J Mater Res, 2009, 23(2): 205-210.
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Abstract The dealumination course of framework of Silicon-Aluminum molecular sieves (SAMS) was simplified as the diffusion of aluminium atoms in the framework as well as the formation and migration of vacancy sites. Based on this simplification in this paper, and the instantaneous concentration of aluminum atoms have been determined as a function of time and location according to Fick's Second Law. The critical parameters affecting the dealumination process was also discussed. The accuracy of the formulae is verified as the calculation results agree with the ratio of silicon to aluminum in Mordenite and ZSM-5 framework measured by XPS and infrared spectra and 27Al-NMR.
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Received: 23 September 2008
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| Fund: Supported by National Basic Research Program of China No.2003CB615804 and the Unite Foundation of National Nature Science Foundation of China and SINOPEC No.20736011. |
| 1 Graham J. Hutchings, Andy Burrows, Colin Rhodes, Dealumination f Mordenite catalysts using a low concentration f steam, Journal Chemical Society, Faraday Transaction, 3, 3593(1997)
2 YananWang, Xinwen Guo, Chen Zhang, Influence of calcinations emperature on the stability of fluorinated nanosized ZSM-5 in the methylation of biphenyl, Catalysis etters, 107, 209(2006)
3 Johan C.Groen, Louk A.A.Peffer, Pore size determination n modified micro-and mesoporous material, Microporous esoporous Material, 60, 1(2003)
4 S.Sen, R.R.Wusirika, R.E.Youngman, High temperature hemal expansion behavior of HZSM–5 zeolites, Microporous esoporous Material, 87, 217(2006)
5 MA Guangwei, TENG Jiawei, XIE Zaiku, Modelling of ealumination of silicon-aluminum molecular sieves, Material cience & Technology, 25(6), 432(2009)
6 CHEN Jinnan, Theory of transfer process, (Beijing, hemical Industry Press, 2004) p.278
(陈晋南, 传递过程原理, (北京, 化学工业出版社, 2004) p.278)
7 XIA Guangrong, FENG Quanli, Similitude of transfer henomenon, (Beijing, SINOPEC Press, 1997) p.143
(夏光榕, 冯权莉, 传递现象相似 (北京, 中国石化出版社, 1997) p.143)
8 T.K.Xiuwude, R.L.Pikefute, Science of quality transfer, Beijing, Chemical Industry Press, 1988) p.78
(T.K.修武德, R.L.皮克福特, 传质学 (北京, 化学工业出版社, 1988) p.78)
9 ZHAO Zhenguo, Application of adsorptive theory, (Beijing, hemical Industry Press, 2005) p.102
(赵振国, 吸附作用应用原理 (北京, 化学工业出版社, 2005) p.102)
10 YANG Sanglin, ZHANG Yu, GUI Tailong, Conspectus of aterial physical, (Harbin, Harbin University of Industry Press, 1999) p.56
(杨尚林, 张宇, 桂太龙, 材料物理导论 (尔滨, 哈尔滨工业大学出版社, 1999) p.56)
11 ZHAO Pin, Xie Fuzhou, Sun Wenshan, Base of Material cience, (Harbin, Harbin University of Industry Press, 1999) p.25
(赵品, 谢辅洲, 孙文山, 材料科学基础 (哈尔滨, 哈尔滨工业大学出版社, 1999) p.25)
12 FU Xiancai, SENWenxia, YAO Tianyang, Physical chemistry, 4(Nanjing, Najing University Press, 1990) p.481
(傅献彩, 沈文霞, 姚天扬, 物理化学, 第四版 (北京,高等教育出版社, 000) p.481)
13 Wladimir Reschetilowski, Wolf-Dietrich Einicke, Michael usek. Magic-angle-spinning nuclear magnetic resonance and adsorption studies of dealumination and realumination of deolite ZSM-5, Applied Catalysis, 56, 15(1989)
14 T.Blasco, A.Corma, Hydrothermal stabilization of ZSM-5 catalytic-cracking additives by phosphorus addition. J. Catal., 237, 267(2006)
15 T.Sano, Rie Tadenuma, Kazuo Soga, Realumination of dealuminated HZSM-5 zeolites by acid treatment. Chem. Cmmun., 1945(1997)
16 Zhao Guoliang, Teng Jiawei, Xie Zaiku, Effect of phosphorus on ZSM-5 catalyst for C4-olefin cracking reactions to produce propylene, J.Catal., 248, 29(2007)
17 Ayyamperumal Sakthivel. Acidity and catalytic behaviors of ordered mesoporous aluminosilicate materials containing zeolite building units. Catalysis Letters, 108, 173(2006)
18 Xue Bin, Catalytic activity of bronsted acid sites in zeolites: intrinsic activity, rare-limiting step, and influence of the locai structure of the acid sites. J. Catal., 244, 163(2006)
19 Hisahiro Einaga, Effect of water vapor on catalytic oxidation of benzene with ozone on alumina-supported manganese oxides. J. Catal, 243, 446(2006)
20 MA Guangwei, XIAO Jingxian, XIE Zaiku, Effect of water vapour on the acidity of ZSM-5 used for catalytic cracking of naphtha to manufacture ethylene and propylene, China Petroleum Processing & Petrochemical Technology, 4, 49(2008) |
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