Progress on diffusion studies in zeolites using ZLC techniques

被引：0
作者：
Chen Z. [1 ]
Wu Y. [1 ]
Xu C. [1 ]
机构：
[1] State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing
来源：
Xu, Chunming (xcm@cup.edu.cn) | 2016年 / Materials China卷 / 67期
基金：
中国国家自然科学基金;
关键词：
Diffusion; Zeolite; Zero length column;
D O I：
10.11949/j.issn.0438-1157.20160427
中图分类号：
学科分类号：
摘要：
The intrapartical diffusivity plays an important role in guiding the process of shape-selective catalysis and adsorptive separation. The methods of study on intracrystalline diffusion in zeolites, such as gravimetric method, NMR technique and molecular simulation, were summarized firstly. Furthermore, recent progress in development and application of Zero Length Column (ZLC) method to the measurement of intracrystalline diffusion in zeolites was reviewed, including single component in gas-phased diffusion with two sampling patterns (gas phase and liquid phase sampling),gas-phased diffusion of binary system and counter diffusion, liquid-phased diffusion, and development of the mathematical models. Some existing problems were also discussed. Finally, application of ZLC method for diffusion of hydrocarbon molecules in the porous materials in the future was prospected. © All Right Reserved.
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页码：3170 / 3178
页数：8
相关论文
共 76 条
  • [1] Durand E., Clemancey M., Quoineaud A.A., Et al., H<sup>1</sup> diffusion-ordered spectroscopy (DOSY) nuclear magnetic resonance (NMR) as a powerful tool for the analysis of hydrocarbon mixtures and asphaltenes, Energy & Fuels, 22, 4, pp. 2604-2610, (2008)
  • [2] Jobic H., Karger J., Krause C., Et al., Diffusivities of n-alkanes in 5A zeolite measured by neutron spin echo, pulsed-field gradient NMR, and zero length column techniques, Adsorption, 11, 1, pp. 403-407, (2005)
  • [3] Ruthven D.M., Diffusion in zeolites-a continuing saga, Adsorption, 16, 6, pp. 511-514, (2010)
  • [4] Song L., Sun Z.L., Rees L.V., Experimental and molecular simulation studies of adsorption and diffusion of cyclic hydrocarbons in silicalite-1, Microporous and Mesoporous Materials, 55, 1, pp. 31-49, (2002)
  • [5] Zhang G., Computer simulation of the adsorption and diffusion of organic molecules in zeolite, (2008)
  • [6] Zhu M.M., Zheng L.G., Qin Y.C., Et al., Adsorption and diffusion of aromatic hydrocarbons on FCC catalysts, Journal of Liaoning Shihua University, 28, 3, pp. 7-11, (2015)
  • [7] Jiang S., Duan L.H., Zhang X.T., Et al., Kinetics of adsorption for cyclopentane in silicalite-1, Journal of Petrochemical Universities, 16, 4, pp. 8-11, (2003)
  • [8] Belmabkhout Y., Frere M., De Weireld G., High-pressure adsorption measurements. A comparative study of the volumetric and gravimetric methods, Measurement Science and Technology, 15, 5, pp. 848-858, (2004)
  • [9] Eic M., Ruthven D.M., A new experimental technique for measurement of intracrystalline diffusivity, Zeolites, 8, 1, pp. 40-45, (1988)
  • [10] Eic M., Ruthven D.M., Intracrystalline diffusion of linear paraffins and benzene in silicalite studied by the ZLC method, Studies in Surface Science and Catalysis, 49, pp. 897-905, (1989)
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