Seyed Mojtaba Mirfendereski*, and , Tayebeh Mazaheri,
{"title":"超疏水硅石-1中空纤维膜的制备","authors":"Seyed Mojtaba Mirfendereski*, and , Tayebeh Mazaheri, ","doi":"10.1021/acs.energyfuels.5c04006","DOIUrl":null,"url":null,"abstract":"<p >This study presents a set of four complementary synthesis strategies for fabricating superhydrophobic silicalite-1 zeolite membranes, specifically designed for H<sub>2</sub>/CO<sub>2</sub> separation under humid conditions. Sequential support masking, dual-layer seeding, variable-temperature hydrothermal growth, and cationic linkage-assisted seeding collectively suppress Al leaching, align seeds, and steer defect-free crystal growth. Structural and morphological characterization, together with gas permeation analyses, confirmed the formation of dense, highly crystalline, and strongly hydrophobic zeolite layers. The optimized membrane exhibits a Si/Al ratio of 249 (typical silicalite-1 < 100), a water contact angle of 157° (conventional <120°), and an H<sub>2</sub>/CO<sub>2</sub> separation factor of 4.7 without sacrificing permeance. Separation performance scales with hydrophobicity, underscoring the importance of minimal Al incorporation and void-free crystals. This scalable synthesis delivers robust membranes suited for post-water gas shift hydrogen purification and high-temperature membrane-reactor integration.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 40","pages":"19526–19536"},"PeriodicalIF":5.3000,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fabrication of Super-Hydrophobic Silicalite-1 Hollow Fiber Membranes for Hydrogen Separation Processes\",\"authors\":\"Seyed Mojtaba Mirfendereski*, and , Tayebeh Mazaheri, \",\"doi\":\"10.1021/acs.energyfuels.5c04006\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >This study presents a set of four complementary synthesis strategies for fabricating superhydrophobic silicalite-1 zeolite membranes, specifically designed for H<sub>2</sub>/CO<sub>2</sub> separation under humid conditions. Sequential support masking, dual-layer seeding, variable-temperature hydrothermal growth, and cationic linkage-assisted seeding collectively suppress Al leaching, align seeds, and steer defect-free crystal growth. Structural and morphological characterization, together with gas permeation analyses, confirmed the formation of dense, highly crystalline, and strongly hydrophobic zeolite layers. The optimized membrane exhibits a Si/Al ratio of 249 (typical silicalite-1 < 100), a water contact angle of 157° (conventional <120°), and an H<sub>2</sub>/CO<sub>2</sub> separation factor of 4.7 without sacrificing permeance. Separation performance scales with hydrophobicity, underscoring the importance of minimal Al incorporation and void-free crystals. This scalable synthesis delivers robust membranes suited for post-water gas shift hydrogen purification and high-temperature membrane-reactor integration.</p>\",\"PeriodicalId\":35,\"journal\":{\"name\":\"Energy & Fuels\",\"volume\":\"39 40\",\"pages\":\"19526–19536\"},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2025-09-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Energy & Fuels\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acs.energyfuels.5c04006\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy & Fuels","FirstCategoryId":"5","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.energyfuels.5c04006","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Fabrication of Super-Hydrophobic Silicalite-1 Hollow Fiber Membranes for Hydrogen Separation Processes
This study presents a set of four complementary synthesis strategies for fabricating superhydrophobic silicalite-1 zeolite membranes, specifically designed for H2/CO2 separation under humid conditions. Sequential support masking, dual-layer seeding, variable-temperature hydrothermal growth, and cationic linkage-assisted seeding collectively suppress Al leaching, align seeds, and steer defect-free crystal growth. Structural and morphological characterization, together with gas permeation analyses, confirmed the formation of dense, highly crystalline, and strongly hydrophobic zeolite layers. The optimized membrane exhibits a Si/Al ratio of 249 (typical silicalite-1 < 100), a water contact angle of 157° (conventional <120°), and an H2/CO2 separation factor of 4.7 without sacrificing permeance. Separation performance scales with hydrophobicity, underscoring the importance of minimal Al incorporation and void-free crystals. This scalable synthesis delivers robust membranes suited for post-water gas shift hydrogen purification and high-temperature membrane-reactor integration.
期刊介绍：
Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.
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