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亲水性沸石膜在异丙醇脱水中的应用及其耐酸性研究

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Indexed by:期刊论文

Date of Publication:2014-12-25

Journal:膜科学与技术

Included Journals:PKU、ISTIC、CSCD

Volume:34

Issue:6

Page Number:77-83

ISSN No.:1007-8924

Key Words:亲水性沸石膜;渗透汽化;耐酸性;异丙醇脱水

Abstract:采用二次生长法,在α-Al2O3陶瓷管上制备亲水性NaA、T型、ZSM-5沸石膜,采用SEM对其进行表征.比较3种亲水性膜在异丙醇/水体系的渗透汽化性能,考察其在不同的料液温度下对异丙醇的分离效果.通过优化膜合成液中Si/Al和F-/Si的摩尔比、合成时间等条件,提高ZSM-5沸石膜的渗透汽化性能.分析考察膜的耐酸性能,结果显示ZSM-5沸石膜具有良好的耐酸性;将ZSM-5沸石膜在pH为5.8的酸性溶液浸泡10天后,用于97%的乙酸乙酯/水体系中渗透汽化脱水,渗透液水含量可达99.59%,渗透通量可达0.12 kg/(m2· h),分离因数高达7 894.

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