Controllable growth of defect-free zeolite protective layer on the surface of Pd membrane for chemical stability enhancement
文献类型：期刊论文
| 作者 | Yu, Jiafeng1; Zhang, Jixin1; Bao, Chun1; Zhang, Zhe1,2; Li, Hui1; Xu, Hengyong1 |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2017-05-15 |
| 卷号 | 244页码:119-126 |
| 关键词 | Zeolite Membrane Synthesis Protective Layer Pd Membrane Chemical Stability Hydrogen Separation And Purification |
| DOI | 10.1016/j.micromeso.2017.02.063 |
| 英文摘要 | Pd 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000399515500016 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/152328]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。