Dual Phase Sorbents for High Temperature Air Separation
Ceramic sorbents based on combined perovskite/spinel structure have been investigated for their potential use in oxygen-enriched CO2 stream production.Oxides of strontium and barium doped with cobalt and iron were chosen for this study.X-ray diffraction studies revealed a dual-phase structure containing perovskite and spinel systems.Microstructure observed by SEM showed the spinel phase as intergrowth structure in the dominantly perovskite phase.Thermogravimetric studies show a higher desorption rate and sorption capacity compared to the similar perovskite sorbents which with a lower CO2 uptake can produce an optimum sorbent material for air separation in oxyfuel power generation.Sintering temperature also showed an effect on oxygen sorptive/desorptive properties.Improved properties can be explained based on the defect chemistry of the new structure.
Mehdi M.Alipour Rajender Gupta John Nychka
Chemical Materials Engineering Department,University of Alberta
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
845-847
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）