Preparation of Fe-substituted hexaaluminate and its catalytic performance for methane combustion
Preparation of Fe-substituted hexaaluminate and its catalytic performance for methane combustion
Fe-substituted hexaaluminate (BaFexAl12-xO19-delta) was prepared with co-precipitation method followed by hydrothermal treatment. The XRD and SEM results indicated that no hexaaluminate phase was formed when calcined below 1000 degreesC, and hexaaluminate was the dominant phase when calcined above 1100 degreesC. Moreover, the UV-Vis-DR result verified that Fe occupied the Oh sites in Fe-hexaaluminate structure. With the increase of Fe content (xless than or equal to3), the activity of hexaaluminate for methane combustion was raised. The most active catalyst was BaFe3Al9O19-delta, the light-off temperature of which was 515 degreesC. Compared with BaFeAl11O19-delta, the high-temperature activity of Ba0.5La0.5FeAl11O19-delta increased greatly, no obvious promotion for methane ignition activity was observed. The reactant atmosphere had impact on methane ignition activity, but slight influence on high-temperature activity due to the transport limitation. Stability experiment was carried out at 800 degreesC for 100 h, and no deactivation was detected.
methane, catalytic combustion, iron substitution, hexaaluminate, lanthanum doping, hydrothermal synthesis
485-489
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Li, J.J.
f597fdea-ebdc-4f83-9860-3ab4f8943dca
Hao, Z.P.
989e7e7f-2a60-4f50-b322-04a78a81fe76
Hou, H.X.
f48669f3-baaf-4419-8db9-c55134e0aa66
Xu, X.Y.
1d8778c3-cbdf-42cf-b52a-093160755970
Hu, C.
72080075-d5a4-4f5e-81b3-5e9e34d58958
June 2004
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Li, J.J.
f597fdea-ebdc-4f83-9860-3ab4f8943dca
Hao, Z.P.
989e7e7f-2a60-4f50-b322-04a78a81fe76
Hou, H.X.
f48669f3-baaf-4419-8db9-c55134e0aa66
Xu, X.Y.
1d8778c3-cbdf-42cf-b52a-093160755970
Hu, C.
72080075-d5a4-4f5e-81b3-5e9e34d58958
Jiang, Zheng, Li, J.J., Hao, Z.P., Hou, H.X., Xu, X.Y. and Hu, C.
(2004)
Preparation of Fe-substituted hexaaluminate and its catalytic performance for methane combustion.
Chinese Journal of Catalysis, 25 (6), .
Abstract
Fe-substituted hexaaluminate (BaFexAl12-xO19-delta) was prepared with co-precipitation method followed by hydrothermal treatment. The XRD and SEM results indicated that no hexaaluminate phase was formed when calcined below 1000 degreesC, and hexaaluminate was the dominant phase when calcined above 1100 degreesC. Moreover, the UV-Vis-DR result verified that Fe occupied the Oh sites in Fe-hexaaluminate structure. With the increase of Fe content (xless than or equal to3), the activity of hexaaluminate for methane combustion was raised. The most active catalyst was BaFe3Al9O19-delta, the light-off temperature of which was 515 degreesC. Compared with BaFeAl11O19-delta, the high-temperature activity of Ba0.5La0.5FeAl11O19-delta increased greatly, no obvious promotion for methane ignition activity was observed. The reactant atmosphere had impact on methane ignition activity, but slight influence on high-temperature activity due to the transport limitation. Stability experiment was carried out at 800 degreesC for 100 h, and no deactivation was detected.
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Published date: June 2004
Keywords:
methane, catalytic combustion, iron substitution, hexaaluminate, lanthanum doping, hydrothermal synthesis
Organisations:
Faculty of Engineering and the Environment
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Local EPrints ID: 352784
URI: http://eprints.soton.ac.uk/id/eprint/352784
PURE UUID: ffa98545-5066-49af-af50-a595e89df1ff
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Date deposited: 17 Jun 2013 15:15
Last modified: 09 Jan 2022 03:44
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Contributors
Author:
J.J. Li
Author:
Z.P. Hao
Author:
H.X. Hou
Author:
X.Y. Xu
Author:
C. Hu
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