期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 36, 期 14, 页码 3457-3464出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.05.021
关键词
Hydrogen transport membrane; Gas separation; Perovskite; Barium zirconate; Lanthanum tungstate
资金
- Initiative and Networking Fund of the Helmholtz Association (HGF) through the Helmholtz-Alberta Initiative
- Bundesministerium of Wirtschaft and Energie through the HotVeGas project [FKZ 0327773]
Mixed protonic-electronic conducting membrane materials offer an alternative method for separating hydrogen from carbon dioxide after the water-gas shift reaction. However, the membrane materials need to be tested for thermochemical stability at challenging operating conditions. BaCe0.5Zr0.4Y0.1O3-delta, BaCe0.2Zr0.7Yb0.08Ni0.02O3-delta, and La5.5WO12-delta were exposed to gas atmospheres containing contaminants like H2S, HCl, KCl, KOH, NaCl, and NaOH. The gas composition of the carrier gas flow simulates the atmospheres before and after the water-gas shift reaction. Sintered samples were exposed at 600 degrees C and 900 degrees C and subsequently analyzed by SEM/EDX and powder-XRD. Afterwards the samples were exposed at 900 degrees C in powder form and then characterized with XRD. Lanthanum tungstate showed very stable behavior for all contaminants. Barium zirconates tended to form chlorine compounds, especially BaCe0.5Zr0.4Y0.1O3-delta. BaCe0.2Zr0.7Yb0.08Ni0.02O3-delta on the other hand showed much more stability, but sustained intergranular corrosion with higher temperatures and syngas conditions when the atmosphere contained potassium. (C) 2016 Published by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据