文献类型：期刊文献

英文题名：Isomorphously substituted B-MFI hollow fibre membranes for p-xylene separation from C8 aromatic mixtures

作者：Deng, Z.[1,2]; Nicolas, C.-H.[1]; Guo, Y.[2]; Giroir-Fendler, A.[1]; Pera-Titus, M.[1]

机构：[1] Université de Lyon, Institut de Recherches sur la Catalyse et l'Environnement de Lyon [IRCELYON], UMR 5256 CNRS, 2 Av. A. Einstein, 69626 Villeurbanne Cedex, France; [2] Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, 200237 Shanghai, China

年份：2011

卷号：80

期号：2

起止页码：323

外文期刊名：Separation and Purification Technology

收录：EI(收录号：20135017080961)

语种：英文

外文关键词：Aluminum oxide - Permeation - Xylene - Silica - Atomic emission spectroscopy - Hydrothermal synthesis - Alumina - Boron - Mixtures - Ethylbenzene

摘要：In this study, Al-MFI and B-MFI (Si/B = 100 and Si/B = 50) hollow fibres with nanocomposite architecture have been prepared on α-alumina by pore-plugging hydrothermal synthesis at 443 K for 89 h using a precursor clear solution with molar composition 1 SiO2: 0.45 TPAOH: 27.8 H 2O: xH3BO3 (x = 0-0.02). The synthesized materials were characterized by XRD, SEM, ICP-AES and 29Si, 27Al- and 11B-MAS-NMR, revealing the genesis of well-intergrown materials with isomorphously substituted boron in the MFI unit cell. The pure ethylbenzene permeance within these membranes decreased in the order Al-MFI > B-MFI (Si/B = 50) > B-MFI (Si/B = 100). All the MFI materials were selective to p-xylene in the vapour permeation of ternary p-/m-/o-xylene mixtures and quaternary p-/m-/o-xylene/ethylbenzene model mixtures in the temperature range 400-650 K and for total feed vapour pressures lower than 4.5 kPa. The p-/m-xylene separation factor increased in the sense Al-MFI