微波辅助二次生长法合成SAPO-34分子筛膜与关键影响因素

doi:10.11949/j.issn.0438-1157.20160926

化工学报 ›› 2017, Vol. 68 ›› Issue (2): 716-722.DOI: 10.11949/j.issn.0438-1157.20160926

微波辅助二次生长法合成SAPO-34分子筛膜与关键影响因素

郝阿辉, 刘晓红, 刘秀凤, 张宝泉

化学工程联合国家重点实验室, 天津大学化工学院, 天津 300350

收稿日期:2016-07-04 修回日期:2016-11-23 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: 刘秀凤
基金资助:
国家自然科学基金项目（21476171）。

Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth

HAO Ahui, LIU Xiaohong, LIU Xiufeng, ZHANG Baoquan

State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

Received:2016-07-04 Revised:2016-11-23 Online:2017-02-05 Published:2017-02-05
Supported by:
supported by the National Natural Science Foundation of China (21476171).

摘要/Abstract

摘要：

采用微波辅助二次生长法在α-Al₂O₃载体上合成了SAPO-34分子筛膜，并将其应用于CO₂/CH₄分离。通过扫描电镜、X射线衍射和傅里叶变换红外光谱等表征方法，系统考察了加热方式、晶种粒径、老化时间和晶化时间对SAPO-34分子筛膜表面形貌和结构的影响。实验结果表明，以0.4 μm分子筛作为晶种，在老化24 h，然后微波加热晶化4 h后可制备出厚度约为1.5 μm的致密、无缺陷SAPO-34分子筛膜，其平均CO₂/CH₄分离因子和CO₂渗透率分别达到81和6.6×10^-7 mol·m^-2·s^-1·Pa^-1，制备方法可靠，重复性高。

关键词: 天然气, SAPO-34分子筛膜, 微波辅助加热, CO₂/CH₄分离

Abstract:

SAPO-34 membranes for separation of CO₂/CH₄ gas mixture were fabricated on porous α-Al₂O₃ substrates by seeded growth under microwave irradiation. Effects of synthesis conditions, including heating mode, seed size, aging and synthesis time, on membrane morphology and structure were investigated in order to manufacture dense and thin SAPO-34 membranes. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) were used to characterize SAPO-34 membranes. 1.5 μm-thick defect-free SAPO-34 membrane could be obtained with high reproducibility at condition of 0.4 μm-sized seed, 24 h aging, and 4 h microwave heating. The new membrane demonstrated an average CO₂/CH₄ separation selectivity at 81 and high CO₂ permeability at 6.6×10^-7 mol·m^-2·s^-1·Pa^-1.

Key words: natural gas, SAPO-34 membrane, microwave-assisted heating, CO₂/CH₄ separation

中图分类号:

TQ028.8

郝阿辉, 刘晓红, 刘秀凤, 张宝泉. 微波辅助二次生长法合成SAPO-34分子筛膜与关键影响因素[J]. 化工学报, 2017, 68(2): 716-722.

HAO Ahui, LIU Xiaohong, LIU Xiufeng, ZHANG Baoquan. Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth[J]. CIESC Journal, 2017, 68(2): 716-722.

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微波辅助二次生长法合成SAPO-34分子筛膜与关键影响因素

Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth

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