Membrane Science and Technology

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Preparation of MFI/?-Al2O3 hollow fiber zeolite membranes and its application to xylene separation

Authors： SUN Feng, ZHANG Chun, HONG Zhou, GU Xuehong

Units： State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, 210009, China

KeyWords： MFI zeolite membranes; hollow fiber; in-situ hydrothermal synthesis; xylene separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2014, 34(2):11-17

Abstract：

MFI zeolite membranes were prepared on α-Al2O3 hollow fiber supports with high packed density by in-situ hydrothermal synthesis method. The influences of hydrothermal synthesis time and repetition times on the quality of the as-synthesized membranes were studied. It was observed that hollow fiber MFI zeolite membranes with excellent structure and para-xylene (PX) permselectivity were fabricated by twice growth for 5 h. Meanwhile, the effects of operating temperature and feed partial pressure on membrane performance were investigated systematically. As a result, the PX/OX and PX/MX separation factor up to 174 and 79 with PX permeance of 3.7×10-9 mol/(m2?s?Pa) was obtained at 150 ℃ for a PX/OX/MX (2:1:1) ternary mixture.

Funds：

国家自然科学基金(21222602); 江苏省杰出青年基金项目(BK2012040); 江苏省六大人才高峰项目; 中国博士后科学基金面上项目(2012M521065).

AuthorIntro：

孙峰(1987-), 男, 江苏泰州人, 在读硕士, 从事膜材料制备与应用. *通讯联系人

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