Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes
Chemical Stability and Its Improvement of Palladium-Based Metallic Membranes
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DOI：
10.1021/ie049722f
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发表时间：
2004-10
影响因子：
4.2
通讯作者：
Huiyuan Gao;Y. S. Lin;Yongdan Li;Baoquan Zhang
中科院分区：
文献类型：
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作者：
Huiyuan Gao;Y. S. Lin;Yongdan Li;Baoquan Zhang
钯基金属膜的化学不稳定性是其在气体分离和膜反应器过程中商业应用的主要障碍。当金属膜暴露于由含硫或含碳气体组成的气流或甚至仅蒸汽时，取决于金属膜的组成，可能发生渗透性或选择性的下降，并且下降的程度取决于温度和分压。本文对含硫、含碳化合物和水对钯基金属膜的毒害作用及其机理进行了全面的综述和深入的分析。本文还总结了文献中报道的几种提高钯基金属膜化学稳定性的方法，并分析了提高化学稳定性的基本原理。这些方法包括将Pd与其他金属（如Cu、Ni、Fe、Pt和Ag）合金化，优选体心立方晶体结构，制备纳米晶。
The chemical instability of palladium-based metal membranes is the major hurdle for their commercial applications in gas separation and membrane reactor processes. When the metal membranes are exposed to a gas stream consisting of sulfur- or carbon-containing gases or even just steam, a drop in permeability or selectivity may occur depending on the composition of the metal membrane, and the extent of the decrease depends on the temperature and partial pressure. This paper provides a comprehensive review and in-depth analysis of the poisoning effects and mechanisms of sulfur- or carbon-containing compounds and H2O on Pd-based metal membranes. The paper also summarizes several methods reported in the literature for improving the chemical stability of Pd-based metal membranes with an analysis on the underlining principles for chemical stability improvement. These methods include alloying Pd with other metals (such as Cu, Ni, Fe, Pt, and Ag) preferably in the body-centered-cubic crystal structure, preparing n...