Mixed-conducting ceramic–carbonate membranes exhibiting high CO2/O2 permeation flux and stability at high temperatures
Mixed-conducting ceramic–carbonate membranes exhibiting high CO2/O2 permeation flux and stability at high temperatures作者机构:Instituto Politécnico NacionalEscuela Superior de Ingeniería Química e Industrias ExtractivasDepartamento de Ingeniería en Metalurgia y MaterialesUPALM-ZacatencoMexico City 07738Mexico Chemical Engineering School for Engineering of MatterTransport and EnergyArizona State UniversityTempeAZ 85287-6106USA
出 版 物:《Journal of Advanced Ceramics》 (先进陶瓷(英文))
年 卷 期:2020年第9卷第1期
页 面:94-106页
核心收录:
学科分类:080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理]
基 金:supported by Proyectos de Investigación Científica y Desarrollo Tecnológico SIP-IPN No.20190014
主 题:CO2 separation O2 separation ceramic–carbonate membrane selectivity
摘 要:This investigation demonstrates the feasibility to fabricate high quality ceramic–carbonate membranes based on mixed-conducting ***,it is reported the simultaneous CO2/O2 permeation and stability properties of membranes constituted by a combination of ceramic and carbonate phases,wherein the microstructure of the ceramic part is composed,in turn,of a mixture of fluorite and perovskite *** ceramics showed ionic and electronic conduction,and at the operation temperature,the carbonate phase of the membranes is in liquid state,which allows the transport of CO32-and O2–species via different *** fabricate the membranes,the ceramic powders were uniaxially pressed in a disk ***,an incipient sintering treatment was carried out in such a way that a highly porous ceramic was ***,the piece is densified by the infiltration of molten *** of the membranes was accomplished by SEM,XRD,and gas permeation techniques among *** and chemical stability under an atmosphere rich in CO2 was ***2/O2 permeation and long-term stability measurements were conducted between 850 and 940℃.The best permeation–separation performance of membranes of about 1 mm thickness,showed a maximum permeance flux of about 4.46×10^–7 mol·m^–2·s^–1·Pa^–1 for CO2 and 2.18×10^–7 mol·m^–2·s^–1·Pa^–1 for O2 at 940℃.Membranes exhibited separation factor values of 150–991 and 49–511 for CO2/N2 and O2/N2 respectively in the studied temperature *** long-term stability test showed certain microstructural changes in the membranes,no significant detriment on the permeation properties was observed along 100 h of continuous operation.