| 变浓度无有机模板剂合成ZSM-5沸石分子筛膜 |
| Preparation of ZSM-5 Zeolite Membranes by Concentration Variation with Organic-free Templates |
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| 摘要: 报道了无有机模板剂制备出15 nm的ZSM-5分子筛，并以其为晶种浸涂在多孔α-Al2O3陶瓷管外表面，再用先浓后稀的无有机模板剂的晶化液水热合成出ZSM-5分子筛膜的新方法。晶种和晶化液的物质的量组成为12Na2O∶100SiO2∶2Al2O3∶(2 500～5 000)H2O。XRD分析表明α-Al2O3陶 |
| 关键词: 纳米ZSM-5 无有机模板剂 变浓度晶化 分子筛膜 渗透率 机理 |
| 基金项目: |
| Abstract: A new method of preparing ZSM-5 zeolite membranes on the outer surface of porous α-Al2O3 tubular by coating 15 nm ZSM-5 seeds without organic templates and then by varying-density synthesis with organic-free template sol-gel was investigated. A template-free nanosized ZSM-5 seeds and synthesis sol-gel of molar composition is 12Na2O∶100SiO2∶2Al2O3∶(2 500～5 000)H2O. XRD showed that the film was consisted of well-crystallized ZSM-5 zeolite. SEM investigation indicated that the zeolite films on the supports were defect free and the film thickness was approximately 5 μm. The permeation flux of H2, N2 and CO2 0.894, 0.327 and 0.314 μmol·(m2·s·Pa)-1, respectively. The ideal selectivity of membrane for H2 / CO2, H2 / N2 was 2.84，2.73, respectively. |
| Keywords: nanosized ZSM-5 organic-free agent varying-density synthesis zeolite membrane permeance mechanism |
| 投稿时间：2004-12-13 修订日期：2005-01-26 |
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| 成岳,杨宇川,李健生,孙秀云,王连军.变浓度无有机模板剂合成ZSM-5沸石分子筛膜[J].无机化学学报,2005,21(6):796-800. |
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