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Controllable growth of defect-free zeolite protective layer on the surface of Pd membrane for chemical stability enhancement
Yu, Jiafeng1; Zhang, Jixin1; Bao, Chun1; Zhang, Zhe1,2; Li, Hui1; Xu, Hengyong1
KeywordZeolite Membrane Synthesis Protective Layer Pd Membrane Chemical Stability Hydrogen Separation And Purification
Source PublicationMICROPOROUS AND MESOPOROUS MATERIALS
2017-05-15
DOI10.1016/j.micromeso.2017.02.063
Volume244Pages:119-126
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordASYMMETRIC ALUMINA SUPPORTS ; THIN-FILM MEMBRANE ; MOLECULAR-SIEVE MEMBRANE ; MASS-FLOW RESISTANCE ; COMPOSITE MEMBRANE ; SI/AL RATIO ; SEPARATION PROPERTIES ; HYDROGEN SEPARATION ; SECONDARY GROWTH ; FACILE SYNTHESIS
AbstractPd membranes play a critical role in hydrogen purification due to excellent hydrogen permeability and selectivity. However, the poor chemical stability of Pd membranes when exposed to inclusion gases or organic reactants severely restricts their commercial applications. Herein, a novel strategy is developed to synthesize a thin and compact zeolite layer on the surface of Pd membrane which acts as an "armor" to protect it from being damaged by poisoning species. The results show that the zeolite membrane was NaA type and defect-free when using Si/AI ratio of 7.5 and silica sol as Si source after two-step hydro thermal synthesis. The variations of H-2 permeance is monitored when Pd and zeolite-Pd composite membranes are exposed to 40% (ethanol/H2O) or 0.2% tetrahydrofuran (THF)/10% N-2 in hydrogen atmosphere. Reactions between ethanol and water on Pd active sites are undetected, indicating the reactants are completely out of contact with Pd membrane in the presence of zeolite protective layer. Especially, compared to pure Pd membrane, almost 80% H-2 permeance decline is constrained by the zeolite "armor" at 350 degrees C and W/E = 6. Moreover, the zeolite protective layer obviously enhances the chemical stability of Pd membrane by suppressing THE cracking and Pd active sites coverage. (C) 2017 Elsevier Inc. All rights reserved.
Language英语
WOS IDWOS:000399515500016
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/152328
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Yu, Jiafeng,Zhang, Jixin,Bao, Chun,et al. Controllable growth of defect-free zeolite protective layer on the surface of Pd membrane for chemical stability enhancement[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2017,244:119-126.
APA Yu, Jiafeng,Zhang, Jixin,Bao, Chun,Zhang, Zhe,Li, Hui,&Xu, Hengyong.(2017).Controllable growth of defect-free zeolite protective layer on the surface of Pd membrane for chemical stability enhancement.MICROPOROUS AND MESOPOROUS MATERIALS,244,119-126.
MLA Yu, Jiafeng,et al."Controllable growth of defect-free zeolite protective layer on the surface of Pd membrane for chemical stability enhancement".MICROPOROUS AND MESOPOROUS MATERIALS 244(2017):119-126.
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