| A型沸石分子筛膜微波合成及渗透汽化性能 |
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| 引用本文： | 董强,徐南平,时钧.A型沸石分子筛膜微波合成及渗透汽化性能[J].化工学报,2001,52(8):749-752. |
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| 作者姓名： | 董强 徐南平 时钧 |
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| 作者单位： | 南京化工大学膜科学技术研究所、江苏省化学工程与技术重点实验室 |
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| 摘 要： | 引 言沸石分子筛具有均匀的分子尺寸微孔结构和良好的热稳定性、机械强度、催化作用 ,是当前无机膜材料研究的热点之一 .沸石分子筛膜合成方法主要有原位水热合成法和汽相合成法 ,应用这些方法已成功合成出Ａ型1] 、Ｙ型2 ] 、Ｐ型3 ] 、ＭＦＩ等4 ] 等沸石分子筛膜 .Ａ型沸石分子筛由于具有0 .3～ 0 .5ｎｍ的有效孔径和三维孔道结构 ,亲水性强 ,有可能在小分子气体如低碳烃类分离及有机物脱水等方面得到应用 .Ｊａｎｓｅｎ等5] 认为晶体粒径愈大 ,产生堆积孔径愈大 ,所合成的沸石分子筛膜存在缺陷可能性愈大 .但从文献报道看 ,沸石分…
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| 关 键 词： | A型沸石 微波合成 渗透汽化 制备 分子筛膜 分离性能 |
| 文章编号： | 0438-1157(2001)08-0749-04 |
| 修稿时间： | 2000年10月24 |
PERVAPORATION PROPERTIES OF A-TYPE ZEOLITE MEMBRANE BY MICROWAVE HEATING |
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| DONG Qiang,XU Nanping,SHI Jun.PERVAPORATION PROPERTIES OF A-TYPE ZEOLITE MEMBRANE BY MICROWAVE HEATING[J].Journal of Chemical Industry and Engineering(China),2001,52(8):749-752. |
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| Authors: | DONG Qiang XU Nanping SHI Jun |
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| Abstract: | The A-type zeolite membrane was synthesized on a porous TiO2 support by using dip-coating and microwave heating.The influence of chemical composition of precursor on the formation of zeolite membrane was investigated.The results showed that the concentration of the precursor determines the performance of zeolite membrane.The zeolite A crystals and the surface morphology of membrane were characterized by XRD and SEM.For the zeolite membrane,the particle size on its surface and the thickness of top-layer was about 0.5μm and 1μm,respectively.The permeability of H2 and N2 hardly changed with pressure and its permselectivity of H2 to N2 was about 5,more than that of Knudsen diffusion.It suggested that the zeolite A membrane exhibits partial molecular sieving.According to pervaporation measurements by using H2O/EtOH mixture,the flux and selectivity of the A-type zeolite membrane for 5% H2O/95% EtOH(mass) mixture at 323K was 0.335kg·m-2 ·h-1 and 690,respectively. |
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| Keywords: | A-type zeolite membrane microwave heating pervaporation |
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