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Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (10): 1857.

• Articles • Previous Articles     Next Articles

A New Technology for the Preparation of High-permeance ZSM-5 Zeolite Membrane

LI Yong-Sheng1, WANG Jin-Qu2, SHI Jian-Lin1, CHEN Lian-Zhang2, GUO Shu-Cai2, YAN Dong-Sheng1   

  1. 1. The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    2. Institute of Adsorption and Inorganic Membrane, Dalian University of Technology, Dalian 116012, China
  • Received:2001-08-20 Online:2002-10-24 Published:2002-10-24

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Abstract: High-permeance ZSM-5 zeolite membrane was prepared on porous tubular α-Al2O3 support by varying-temperature hydrothermal synthesis. XRD patterns show that the membrane consists of ZSM-5 zeolite crystals. SEM analysis indicates that few defects exist in the membrane and the thickness of the membrane is about 9 μm. The hydrogen permeance through the membrane is about 2.4×10-6 mol/(m2·s·Pa), and the separation factor for n-C4H10/i-C4H10 mixture (volume ratio 1∶1) is 40, which indicates that it has a high quality with high permeance and selectivity. Repeated nucleation and re-growth of the crystals on the support result in the dense membrane formation.

Key words: ZSM-5 zeolite membrane, Varying-temperature synthesis, Permeance, Separation factor

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