OXYGEN SEPARATION USING MIXED CONDUCTIVE PEROVSKITE OXIDES AS POTENTIAL LOW-CARBON TECHNOLOGY
Mixed ionic-electronic conductive perovskite-type oxides desorb and absorb a large amount of oxygen reversibly from and into the crystal lattice without changing their fundamental crystal structures. By full use of the reversible oxygen sorption-desorption property and mixed conductivity, oxygen separation from air with 100％ selectivity is possible at temperatures above, for example, 300℃. High temperature oxygen separation is expected to be one of low-carbon technologies, because it can contribute the improvement of the energy-efficiencies through the recovery of waste heat from hightemperature facilities. Oxygen separation is also a key technology for oxy-fuel combustion, the exhaust of which is CCS-ready mixture of H2O and CO2 in principle. In this presentation, two types of oxygen separation technologies by using mixed ionic-electronic conductors are outlined; one is the temperature/pressure swing separation at medium temperature range (for example, 300-600 ℃) and another is membrane separation at high temperature range (usually above 800℃).
Yasutake TERAOKA
Faculty of Engineering Sciences, Kyushu University 6-1, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
国际会议
大连
英文
12
2012-05-28（万方平台首次上网日期，不代表论文的发表时间）