TY - JOUR
T1 - Oxygen separation from air using Ba0.95La0.05FeO3-δ membranes fitted with porous La1-xSrxFeO3-δ layers
AU - Kida, Tetsuya
AU - Ninomiya, Subaru
AU - Tatsushiro, Hiroki
AU - Watanabe, Ken
AU - Yuasa, Masayoshi
AU - Shimanoe, Kengo
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research (B) (No. 23360311 ) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
Publisher Copyright:
© 2015 Elsevier Ltd. and Techna Group S.r.l. All rights reserved.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Selective oxygen separation from air was performed using perovskite-type oxide membranes made of Ba0.95La0.05FeO3-δ. We demonstrated that surface modification of Ba0.95La0.05FeO3-δ membranes with La1-xSrxFeO3-δ catalyst layers led to an increase in oxygen permeation fluxes at 700-930 °C. We studied the effects of oxygen vacancy amounts, surface area, particles size, surface treatment of La1-xSrxFeO3-δ on the oxygen permeability of the membranes fitted with La1-xSrxFeO3-δ catalyst layers. Among the catalyst layers tested, the membranes fitted with La0.9Sr0.1FeO3-δ (x=0.1) showed the highest oxygen permeation flux probably because of its higher porosity and uniform morphology without open voids, which would increase the number of surface reaction sites. The obtained results suggest the feasibility of further upgrading the membrane performance by using surface catalyst layers having a homogeneous morphology and a different composition from that of the mother membrane.
AB - Selective oxygen separation from air was performed using perovskite-type oxide membranes made of Ba0.95La0.05FeO3-δ. We demonstrated that surface modification of Ba0.95La0.05FeO3-δ membranes with La1-xSrxFeO3-δ catalyst layers led to an increase in oxygen permeation fluxes at 700-930 °C. We studied the effects of oxygen vacancy amounts, surface area, particles size, surface treatment of La1-xSrxFeO3-δ on the oxygen permeability of the membranes fitted with La1-xSrxFeO3-δ catalyst layers. Among the catalyst layers tested, the membranes fitted with La0.9Sr0.1FeO3-δ (x=0.1) showed the highest oxygen permeation flux probably because of its higher porosity and uniform morphology without open voids, which would increase the number of surface reaction sites. The obtained results suggest the feasibility of further upgrading the membrane performance by using surface catalyst layers having a homogeneous morphology and a different composition from that of the mother membrane.
UR - http://www.scopus.com/inward/record.url?scp=84927578324&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84927578324&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2015.02.118
DO - 10.1016/j.ceramint.2015.02.118
M3 - Article
AN - SCOPUS:84927578324
SN - 0272-8842
VL - 41
SP - 7830
EP - 7835
JO - Ceramics International
JF - Ceramics International
IS - 6
ER -