Synthesis of High Permeances of ZSM-5 Zeolite Membranes

Abstract

Abstract: Zeolite ZSM-5 membrane, whose permeance was up to10^-6mol/(m²·s·Pa) and a magnitude higher than that of other groups, was prepared on α Al₂O₃support by multi in situ hydrothermal treatments, using optimized sol prescription and cheap n butane as the structure directing agent.The membrane was characterized by means of XRD, SEMand single gas permeances measurements, which showed that it was dense and integral without large intercrystal pores and cracks.The permeance of H₂, N₂, C3H8 and n C₄H₁₀was up to2.35×10^-6, 1.0×10^-6, 1.13×10^-7and_4.9×10^-8mol/(m₂·s·Pa), respectively.Ideal selectivity of H₂/N₂, H₂/C₃H₈and H₂/ n C₄H₁₀was2.45, 20.8 and48, respectively

Key words: Hydrothermal crytallization, Zeolite ZSM-5 membrane, Permeance, Selectivity

CLC Number:

O643.36

TrendMD:

LI Yong-Sheng, WANG Jin-Qu, GUO Shu-Cai. Synthesis of High Permeances of ZSM-5 Zeolite Membranes[J]. Chem. J. Chinese Universities, 2000, 21(12): 1812.

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Synthesis of High Permeances of ZSM-5 Zeolite Membranes

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