Fabrication of Super-Hydrophobic Silicalite-1 Hollow Fiber Membranes for Hydrogen Separation Processes

IF 5.3 3区工程技术 Q2 ENERGY & FUELS

Energy & Fuels Pub Date : 2025-09-29 DOI:10.1021/acs.energyfuels.5c04006

Seyed Mojtaba Mirfendereski*, and , Tayebeh Mazaheri,

{"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":"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.","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}

引用次数: 0

Abstract

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.

Abstract Image

查看原文本刊更多论文

超疏水硅石-1中空纤维膜的制备

本研究提出了一套四种互补的合成策略来制造超疏水硅-1沸石膜，专门用于在潮湿条件下分离H2/CO2。顺序支持掩蔽、双层播种、变温水热生长和阳离子连接辅助播种共同抑制Al浸出、排列种子和引导无缺陷晶体生长。结构和形态表征以及气体渗透分析证实了致密、高结晶性和强疏水性沸石层的形成。优化后的膜的Si/Al比为249（典型的硅石-1 <； 100），水接触角为157°（传统的<；120°），在不牺牲渗透率的情况下，H2/CO2分离系数为4.7。分离性能与疏水性有关，强调了最小铝掺入和无空隙晶体的重要性。这种可扩展的合成提供了适用于水后气体转换氢净化和高温膜反应器集成的坚固膜。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Energy & Fuels 工程技术-工程：化工

CiteScore

9.20

自引率

13.20%

发文量

1101

审稿时长

2.1 months

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.