Performance of Sm_(0.7)Sr_(0.3)CoO_(3-δ) dmembrane under CO_2-containing atmosphere  

作　　者：Yu-Wen Zhang Fan-Lin Zeng Chen-Chen Yu Cheng-Zhang Wu Wei-Zhong Ding Xiong-Gang Lu 

机构地区：[1]Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,Shanghai University

出　　处：《Rare Metals》2016年第9期723-728,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51174133,51274139 and 51225401);the Science and Technology Commission of Shanghai Municipality (No.11ZR1412900)

摘　　要：The permeability and stability of Sm_（0.7）Sr_（0.3）CoO_（3-δ）（SSCO） regarding the special requirements for carbon capture and storage（CCS） application were investigated.Pure CO_ was used as the sweep gas at 900 °C,leading to that the oxygen permeation flux decreases by about 34 %.Several cycles of changing the sweep gas between helium and CO_2 indicate the good reversibility of this degradation.Both carbonate formation and adsorption of CO_2 on the membrane surface are responsible for the degradation of the membrane performance.The better CO_2 resistance results from the substitution of Sm for Sr due to the higher acidity of Sm_2O_3（1.278） than that of Sr O（0.978） and a discontinuous layer of carbonate.The permeability and stability of Sm_（0.7）Sr_（0.3）CoO_（3-δ）（SSCO） regarding the special requirements for carbon capture and storage（CCS） application were investigated.Pure CO_ was used as the sweep gas at 900 °C,leading to that the oxygen permeation flux decreases by about 34 %.Several cycles of changing the sweep gas between helium and CO_2 indicate the good reversibility of this degradation.Both carbonate formation and adsorption of CO_2 on the membrane surface are responsible for the degradation of the membrane performance.The better CO_2 resistance results from the substitution of Sm for Sr due to the higher acidity of Sm_2O_3（1.278） than that of Sr O（0.978） and a discontinuous layer of carbonate.

关 键 词：Sm0.7Sr0.3CoO3-δ Oxygen permeation CO2 Carbonate Perovskite 

分 类 号：O614.337[理学—无机化学] TB383.2[理学—化学]