Composite of Ce0.8Gd0.2O2 - δ and GdBaCo2O5+δ as oxygen separation membranes

被引：19
作者：
Choi, M-B [1 ]
Jeon, S-Y [1 ]
Hwang, H-J [2 ]
Park, J-Y [3 ]
Song, S-J [1 ]
机构：
[1] Chonnam Natl Univ, Dept Mat Sci & Engn, Kwangju 500757, South Korea
[2] Inha Univ, Dept Mat Sci & Engn, Inchon 402751, South Korea
[3] Sejong Univ, Dept Adv Mat Engn, Seoul 143747, South Korea
来源：
SOLID STATE IONICS | 2010年 / 181卷 / 37-38期
关键词：
Ionic conductivity; Composite; Oxygen separation membranes; PEROVSKITE-TYPE OXIDES; PERMEATION PROPERTIES; CHEMICAL DIFFUSIVITY; BISMUTH OXIDE; FUEL-CELLS; PERMEABILITY; CONDUCTIVITY; TRANSPORT; METHANE; GAS;
D O I：
10.1016/j.ssi.2010.09.027
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel oxygen separation membrane using oxygen ions and a mixed oxygen ion-electron conducting CGO-GBCO (Ce0.8Gd0.2O2 (-) (delta)-GdBaCo2O5 + delta,) dual phase composite has been proposed. The transport and surface exchange properties of the CGO-GBCO composite membrane are investigated as a function of oxygen partial pressure (OPP) over the OPP range of 10(-4) <= pO(2)/atm <= 0.21 at 1073 <= T/K <= 1323 using DC conductivity relaxation experiments. The surface exchange coefficient and the oxygen chemical diffusion coefficient of the composite are similar to those of the CGO-based composite membrane under oxidizing conditions. The characteristic thickness of the specimen, calculated from the oxygen chemical diffusion coefficient and surface exchange coefficient, L-c = (D) over tilde /X is 0.25 mm at 1223 K. The thermally activated oxygen permeation flux monotonically increased with increasing oxygen chemical potential gradient, yielding a maximum of 0.28 cc/min . cm(2) at air/He condition for the 0.62 mm-thick CGO-GBCO specimen at 1223 K. This value is an order of magnitude higher than that of GBCO at the same condition. (C) 2010 Elsevier B.V. All rights reserved.
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页码：1680 / 1684
页数：5
相关论文
共 28 条
  • [1] Applications of catalytic inorganic membrane reactors to refinery products
    Armor, JN
    [J]. JOURNAL OF MEMBRANE SCIENCE, 1998, 147 (02) : 217 - 233
  • [2] Stabilized bismuth oxide noble metal mixed conducting composites as high temperature oxygen separation membranes
    Chen, CS
    Burggraaf, AJ
    [J]. JOURNAL OF APPLIED ELECTROCHEMISTRY, 1999, 29 (03) : 355 - 360
  • [3] Chemical diffusivity and ionic conductivity of GdBaCo2O5+δ
    Choi, M. -B.
    Jeon, S. -Y.
    Lee, J. -S.
    Hwang, H. -J.
    Song, S. -J.
    [J]. JOURNAL OF POWER SOURCES, 2010, 195 (04) : 1059 - 1064
  • [4] High-temperature transport properties of La0.1Sr0.9Co0.8Fe0.2O3-δ
    Choi, M-B.
    Jeon, S-Y.
    Park, J-Y
    Yang, H-S.
    Song, S-J.
    [J]. SOLID STATE IONICS, 2011, 192 (01) : 269 - 274
  • [5] ELENA K, 2009, SOLID STATE IONICS, V180, P778
  • [6] Fe doped LaGaO3 perovskite oxide as an oxygen separating membrane for CH4 partial oxidation
    Ishihara, T
    Tsuruta, Y
    Todaka, T
    Nishiguchi, H
    Takita, Y
    [J]. SOLID STATE IONICS, 2002, 152 : 709 - 714
  • [7] JIANXIN Y, 2006, J MEMBRANE SCI, V280, P849
  • [8] Oxygen transport in Ce0.8Gd0.2O2-δ-based composite membranes
    Kharton, VV
    Kovalevsky, AV
    Viskup, AP
    Shaula, AL
    Figueiredo, FM
    Naumovich, EN
    Marques, FMB
    [J]. SOLID STATE IONICS, 2003, 160 (3-4) : 247 - 258
  • [9] Oxygen permeability of Ce0.8Gd0.2O2-δ-La0.7Sr0.3MnO3-δ composite membranes
    Kharton, VV
    Kovalevsky, AV
    Viskup, AP
    Figueiredo, FM
    Yaremchenko, AA
    Naumovich, EN
    Marques, FMB
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (07) : 2814 - 2821
  • [10] Synthesis and oxygen permeation properties of ceramic-metal dual-phase membranes
    Kim, J
    Lin, YS
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2000, 167 (01) : 123 - 133
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