TY - JOUR
T1 - Enhanced High Oxygen Permeation of Mixed-Conducting Multichannel Hollow Fiber Membrane via Surface Modified Porous Layer
AU - Guo, Shaobin
AU - Zhu, Jiawei
AU - Liu, Zhengkun
AU - Jiang, Xin
AU - Zhang, Zhicheng
AU - Jin, Wanqin
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/7/15
Y1 - 2015/7/15
N2 - The oxygen permeation performance of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) mixed-conducting multichannel hollow fiber (MCMHF) membranes was improved by surface modification via spin-spraying of a La0.6Sr0.4CoO3-δ (LSC) porous layer. At 1173 K, the oxygen permeation flux of the modified membranes was clearly enhanced and reached 9.68 mL·cm-2·min-1, which is a remarkable high value in the field of mixed-conducting oxygen permeation membrane processes. Theoretical calculations demonstrated that the oxygen transport resistance, especially the surface exchange resistance, obviously decreased as a result of the modified LSC porous layer. Moreover, the process of oxygen permeation through the modified membrane was controlled by both bulk diffusion and the surface oxygen exchange reaction, whereas the oxygen permeation of the unmodified membrane was dominantly controlled by the surface oxygen exchange reaction. The modified MCMHF membranes showed generally stable oxygen permeation fluxes over 100 h at 1173 K.
AB - The oxygen permeation performance of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) mixed-conducting multichannel hollow fiber (MCMHF) membranes was improved by surface modification via spin-spraying of a La0.6Sr0.4CoO3-δ (LSC) porous layer. At 1173 K, the oxygen permeation flux of the modified membranes was clearly enhanced and reached 9.68 mL·cm-2·min-1, which is a remarkable high value in the field of mixed-conducting oxygen permeation membrane processes. Theoretical calculations demonstrated that the oxygen transport resistance, especially the surface exchange resistance, obviously decreased as a result of the modified LSC porous layer. Moreover, the process of oxygen permeation through the modified membrane was controlled by both bulk diffusion and the surface oxygen exchange reaction, whereas the oxygen permeation of the unmodified membrane was dominantly controlled by the surface oxygen exchange reaction. The modified MCMHF membranes showed generally stable oxygen permeation fluxes over 100 h at 1173 K.
UR - http://www.scopus.com/inward/record.url?scp=84937046455&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.5b01009
DO - 10.1021/acs.iecr.5b01009
M3 - 文章
AN - SCOPUS:84937046455
SN - 0888-5885
VL - 54
SP - 6985
EP - 6992
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 27
ER -