TY - JOUR
T1 - Oxygen permeation and methane reforming properties of ceria-based composite membranes
AU - Takamura, H.
AU - Kobayashi, T.
AU - Kasahara, T.
AU - Kamegawa, A.
AU - Okada, M.
N1 - Funding Information:
This work has been supported by CREST of Japan Science and Technology Corporation (JST), The Japan Research and Development Center for Metals (JRCM), and Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Young Scientists (B), No. 15760512.
PY - 2006/2/9
Y1 - 2006/2/9
N2 - The preparation and oxygen permeation properties of novel composites of Ce0.9Sm0.1O1.95-x vol% Mn (1.5-0.5y)Co(1+0.5y)Ni0.5O4 (CSO-xMCNO; 5 ≤ x ≤ 25; 0 ≤ y ≤ 1.0) have been investigated. The composites were prepared by the Pechini process to obtain fine microstructures. The composites fired at 1300 °C for 2 h were found to consist of Ce 0.9Sm0.1O1.95 and two different spinel-type oxides. The oxygen flux density of 0.3 mm-thick CSO-15MCNO with y = 1.0 was found to be 1.1 and 7.5 μmol cm-2 s-1 at 1000 °C under He (20 sccm)/air and Ar-10%CH4 (100 scm)/air gradients, respectively. CSO-25MCNO with a larger amount of spinel-type phases exhibited a high oxygen flux density of 6.2 μmol cm-2 s-1 and CO selectivity of 72% at 1000 °C without a conventional reforming catalyst. In addition, Ce0.9Sm0.1O1.95-15 vol% MnFe 2O4 (CSO-15MFO) membranes were prepared by means of tape-casting technique. As a result of the optimization of slurry composition, a crack-free dense membrane with dimensions of 5 cm × 5 cm was successfully prepared after sintering at 1300 °C for 2 h. For the tape-cast 133 μm-thick membrane, an oxygen flux density of 9.5 μmol cm-2 s-1 was attained at 1000 °C. Laminated membranes has been also successfully prepared.
AB - The preparation and oxygen permeation properties of novel composites of Ce0.9Sm0.1O1.95-x vol% Mn (1.5-0.5y)Co(1+0.5y)Ni0.5O4 (CSO-xMCNO; 5 ≤ x ≤ 25; 0 ≤ y ≤ 1.0) have been investigated. The composites were prepared by the Pechini process to obtain fine microstructures. The composites fired at 1300 °C for 2 h were found to consist of Ce 0.9Sm0.1O1.95 and two different spinel-type oxides. The oxygen flux density of 0.3 mm-thick CSO-15MCNO with y = 1.0 was found to be 1.1 and 7.5 μmol cm-2 s-1 at 1000 °C under He (20 sccm)/air and Ar-10%CH4 (100 scm)/air gradients, respectively. CSO-25MCNO with a larger amount of spinel-type phases exhibited a high oxygen flux density of 6.2 μmol cm-2 s-1 and CO selectivity of 72% at 1000 °C without a conventional reforming catalyst. In addition, Ce0.9Sm0.1O1.95-15 vol% MnFe 2O4 (CSO-15MFO) membranes were prepared by means of tape-casting technique. As a result of the optimization of slurry composition, a crack-free dense membrane with dimensions of 5 cm × 5 cm was successfully prepared after sintering at 1300 °C for 2 h. For the tape-cast 133 μm-thick membrane, an oxygen flux density of 9.5 μmol cm-2 s-1 was attained at 1000 °C. Laminated membranes has been also successfully prepared.
KW - Electrochemical reaction
KW - Electrode materials
KW - Hydrogen production
KW - Powder metallurgy
KW - Syngas production
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U2 - 10.1016/j.jallcom.2004.12.139
DO - 10.1016/j.jallcom.2004.12.139
M3 - Conference article
AN - SCOPUS:31144438903
VL - 408-412
SP - 1084
EP - 1089
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
T2 - Proceedings of the Rare Earths'04 in Nara, Japan
Y2 - 7 November 2004 through 12 November 2004
ER -
