Oxygen-selective membranes integrated with oxy-fuel combustion

被引：54

作者：

Chen, Wei ^{[1
]}

Chen, Chu-sheng ^{[2
,3
]}

Bouwmeester, Henny J. M. ^{[1
,2
,3
]}

Nijmeijer, Arian ^{[1
]}

Winnubst, Louis ^{[1
,2
,3
]}

机构：

[1] Univ Twente, Mesa Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[2] Univ Sci & Technol China, CAS Key Lab Adv Mat Energy Convers, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China

来源：

JOURNAL OF MEMBRANE SCIENCE | 2014年 / 463卷

关键词：

Oxy-fuel; Perovskite; Membrane; CO2; tolerance; RAY PHOTOELECTRON-SPECTROSCOPY; PEROVSKITE-TYPE OXIDES; CO2; TOLERANCE; PERMEATION; STABILITY; PERMEABILITY;

D O I：

10.1016/j.memsci.2014.03.063

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The perovskite-type oxide SrCo0.8Fe0.2O3-delta (SCF), a highly oxygen permeable material, is restricted for application in the membrane integrated oxy-fuel combustion process by its low tolerance to CO2. In the present work, we found that the CO2 tolerance of SCF is improved by increasing the oxygen partial pressure in the CO2-containing gas. Long term oxygen permeation experiments, at 950 degrees C, show that mixing 5% of oxygen into the CO2 sweep gas effectively prevents degradation of the SCF membrane. X-ray photoelectron spectroscopy indicates that the increase in CO2 tolerance of SCF is caused by a decrease in basicity of the material with increasing oxygen partial pressure. Based on these experimental results, a modified oxy-fuel combustion process is proposed. Calculation of the required membrane area for operating a 50 MW coal-fired power plant showed that the modified process comprises a viable option. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：166 / 172

页数：7

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