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Liquid phase oxidation and low-temperature calcination method for organic template removal from Silicalite-1 membrane and its performance

Authors： SHEN Dong, YANG, Jianhua, XIAO Wei, LI Tiansheng, L U Jinming, WANG Jinqu

Units： Institute of Adsorption and Inorganic Membrane, State Key Laboratory of Fine Chemicals，

KeyWords： Silicalite-1 membrane; liquid phase oxidation; single-gas permeation; pervaporation

ClassificationCode：TQ028. 8

year,volume(issue):pagination： 2011, 31(1):61-65

Abstract：

Silicalite-1 zeolite membrane was prepared on macro porous α-Al2O3 support by in-situ crystallization method. Liquid phase oxidation and low-temperature calcination method was used to remove template molecules from Silicalite-1 membrane, which replaced the conventional high temperature calcination method. SEM, single gas permeation and pervaporation (PV) performance tests as a function of temperature were used to characterize the as-synthesized zeolite membrane. The results showed that the prepared membrane was typical Silicalite-1, continuous, dense and no obvious defects. The permeance of N2 is 8.16×10-7 mol/(m2•s•Pa) and the ideal selectivity of N2/i-C4H10 was up to 425 at 293 K and ideal selectivity of CO2/N2 was 2.89 at 428 K. The fluxes of Silicalite-1 membrane at 333 K is 0.83 kg/(m2•h) towards ethanol/H2O mixtures, and the corresponding separation factors was 40.3.

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AuthorIntro：

沈东(1981 - )，男，河北保定人，在读硕士，电话：13940908256，从事Silicalite-1沸石膜的制备、表征及其应用研究。

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