首页|间歇式水热合成制备丝光沸石膜及其异丙醇脱水应用

间歇式水热合成制备丝光沸石膜及其异丙醇脱水应用

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采用市售廉价大孔α-Al2O3管作为基质材料，通过热浸渍法在管外表面涂敷晶种，随后在无模板剂体系下，利用新型的间歇式水热合成法制备丝光沸石膜。对比了传统加热和间歇式加热对丝光沸石膜形貌、结构及渗透蒸发异丙醇脱水分离性能的差异。考察了合成液中Na2O/SiO2、SiO2/Al2O3和NaF/SiO2物质的量之比在间歇式水热合成下对丝光沸石膜的影响。研究结果表明，当合成液中Na2O/SiO2、SiO2/Al2O3和NaF/SiO2物质的量之比分别为0。24、16。7和0。25时，制备的丝光沸石膜渗透蒸发异丙醇脱水分离性能最佳，在75℃下，对异丙醇/水(9∶1，w/w)的渗透通量达5。60kg·m-2·h-1，水对异丙醇的分离因数大于10000。
Preparation of mordenite zeolite membrane by intermittent hydrothermal synthesis and its application in isopropanol dehydration
A novel intermittent hydrothermal method was applied to synthesize mordenite zeolite membrane.The membrane was synthesized in a template-free synthetic solution using commercially available,economical,macropo-rous α-Al2O3 tube as the substrate.The out surface of the substrate was coated with a mordenite seed layer via a hot-dip coating procedure.The influences of the traditional continuous heating method and the novel intermittent heat-ing method on the morphology,microstructure and pervaporation performance for isopropanol dehydration of the mordenite membranes were compared.The impacts of molar ratios of Na2O/SiO2,SiO2/Al2O3,and NaF/SiO2 in the synthetic solution on the preparation of mordenite zeolite membranes under intermittent hydrothermal synthesis were investigated.The as-synthesized mordenite zeolite membrane showed maximum pervaporation performance for isopropanol dehydration under optimized synthetic solution composition with the molar ratios of Na2O/SiO2,SiO2/Al2O3,and NaF/SiO2 were 0.24,16.7 and 0.25,respectively.The maximum water permeation flux was 5.60 kg·m-2· h-1 and the separation factor was greater than 10 000,respectively,in the dehydration of isopropanol/water mixture(9∶1,w/w)at 75 ℃.

mordenite membraneintermittent hydrothermal synthesispervaporationisopropanol dehydration

李良清、李佳佳、叶其婷、王凯凯、李良松

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黄山学院化学与化工学院,功能膜与能源材料重点实验室,黄山 245041

中国科学技术大学化学与材料科学学院,合肥 230026

韩国高丽大学化学与生物工程系,首尔02841

中海油能源发展股份有限公司上海安全环保分公司,上海 200335

中海油安全技术服务有限公司上海分公司,上海 200335

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丝光沸石膜 间歇式水热合成 渗透蒸发 异丙醇脱水

安徽高校自然科学重大研究项目安徽高校自然科学重点研究项目中国博士后科学基金安徽省高校优秀青年骨干人才国外访学研修项目国家基金培育项目国家大学生创新创业训练计划项目国家大学生创新创业训练计划项目

2023AH0401772023AH0513882020M682039gxgwfx20200612021GJYY001202310375008202310375030

2024

10.11862/CJIC.20230327

无机化学学报
中国化学会

无机化学学报

CSTPCD北大核心
影响因子：0.665
ISSN：1001-4861
年,卷(期)：2024.40(2)
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