| 二次水热合成法制备ZSM-5分子筛膜及其渗透汽化性能 |
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| 引用本文： | 朱美华,夏水莲,刘永生,袁晓蕾,李羚,桂田,张飞,刘鑫,陈祥树.二次水热合成法制备ZSM-5分子筛膜及其渗透汽化性能[J].化工进展,2016,35(9):2885-2891. |
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| 作者姓名： | 朱美华 夏水莲 刘永生 袁晓蕾 李羚 桂田 张飞 刘鑫 陈祥树 |
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| 作者单位： | 江西师范大学化学化工学院, 江西 南昌 330022 |
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| 基金项目： | 国家自然科学基金面上项目（21476099）、国家国际科技合作专项（2015DFA50190）、国家自然科学基金青年基金（21503100）、江西省教育厅科学技术研究项目（14240）及江西省科技厅对外合作科技项目（20141BDH80011）。 |
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| 摘 要： | 采用二次水热合成法在管状多孔莫来石支撑体上制备高耐酸性ZSM-5分子筛膜，系统地研究分子筛晶种和合成溶胶中H2O/SiO2摩尔比率对ZSM-5分子筛膜生长与渗透汽化性能的影响，采用X射线衍射、冷场扫描电子显微镜和电子能谱等表征技术分别对制备的ZSM-5分子筛及其ZSM-5分子筛膜的结构、形貌和Si/Al比进行表征。针对分离75℃、90% HAc/H2O的水溶液，最优化条件下制备的ZSM-5分子筛膜表现出优良的渗透汽化性能，渗透通量和分离因子分别为0.98kg/(m2·h)和890。此外，本研究所采用制备耐酸性ZSM-5分子筛膜的方法表现出良好的重现性，重复制备的12根ZSM-5分子筛膜在75℃下分离90% HAc/H2O的水溶液时，平均通量和分离系数分别为（0.85±0.15）kg/(m2·h)和650±290。再者，ZSM-5分子筛膜在45～75℃的温度范围内分离50%～95% HAc/H2O水溶液时都表现出优良的渗透汽化性能。
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| 关 键 词： | 耐酸性ZSM-5分子筛膜 晶种 H2O/SiO2比率 渗透汽化 重复性 |
| 收稿时间： | 2015-12-16 |
Secondary hydrothermal synthesis of ZSM-5 zeolite membrane and its pervaporation performance |
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| ZHU Meihua,XIA Shuilian,LIU Yongsheng,YUAN Xiaolei,LI Ling,GUI Tian,ZHANG Fei,LIU Xin,CHEN Xiangshu.Secondary hydrothermal synthesis of ZSM-5 zeolite membrane and its pervaporation performance[J].Chemical Industry and Engineering Progress,2016,35(9):2885-2891. |
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| Authors: | ZHU Meihua XIA Shuilian LIU Yongsheng YUAN Xiaolei LI Ling GUI Tian ZHANG Fei LIU Xin CHEN Xiangshu |
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| Affiliation: | College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China |
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| Abstract: | The high acid-proof ZSM-5 zeolite membranes are prepared on tubular porous mullite supports by secondary hydrothermal synthesis,and the effects of seed crystals,H2O/SiO2 molar ratio of the precursor synthesis gel on the growth and pervaporation performance of ZSM-5 zeolite membranes are studied systematically. The structure,morphology,and Si/Al ratio of the ZSM-5 zeolite crystals and membranes are characterized by XRD,FE-SEM,and EDX. For the separation of 90% HAc/H2O mixture at 75℃,the flux and separation factor (H2O over HAc) of ZSM-5 zeolite membrane prepared with the optimum synthesis condition has a well dehydration performance,and the total flux and separation factor are 0.98kg/(m2·h) and 890,respectively. Besides,the prepared ZSM-5 zeolite membranes show good reproducibility,and the average flux and separation factor of the 12 pieces of ZSM-5 zeolite membranes are(0.85±0.15) kg/(m2·h) and 650±290 for dehydration of 90% HAc/H2O mixture at 75℃. Moreover,the ZSM-5 zeolite membrane presents excellent dehydration performance for 50%~95% HAc/H2O at 45~75℃. |
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| Keywords: | acid-stable ZSM-5 zeolite membrane seed crystals H2O/SiO2 ratio pervaporation reproducibility |
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