The effect of lanthanum addition on the catalytic activity of γ-alumina supported bimetallic Co–Mo carbides for dry methane reforming
The effect of lanthanum addition on the catalytic activity of γ-alumina supported bimetallic Co–Mo carbides for dry methane reforming
The effect of lanthanum addition to γ-alumina supported bimetallic carbides has been studied for the reaction of dry methane reforming using four different lanthanum loading levels of 1, 5, 10 and 15 wt% of lanthanum. It has been demonstrated that the addition of lanthanum to supported bimetallic carbides at low loading levels (1 wt%) results in smaller carbide crystallite sizes compared to catalysts containing either no lanthanum or higher lanthanum loading levels (5–15 wt%). Increased lanthanum loading results in increased carbon dioxide desorption at 500–700 °C. Reactions indicated that increased lanthanum loading resulted in significantly reduced product yields due to increased reverse water–gas shift activity. All materials exhibited degrees of sintering during the reaction. It was found that cobalt reacted with lanthanum species to form a LaCoO3 phase. The 1 wt% catalyst possessed superior catalytic properties for dry methane reforming and was tested for 100 h. After an initial loss of activity, the catalyst appeared to stabilise, however, a decrease of ~3 % in the H2:CO ratio, evidence of carbide crystallite growth and carbon deposition, indicated that a shift in the side reactions had occurred during the reaction.
145-156
France, Liam J
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Du, Xian
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Almuqati, Naif
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Kuznetsov, Vladimir L.
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Zhao, Yongxiang
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Jiang, Zheng
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Xiao, Tiancun
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Bagabas, Abdulaziz
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Almegren, Hamid
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Edwards, Peter P.
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May 2014
France, Liam J
937d0ea5-0b48-4e96-8a72-85d64751a934
Du, Xian
d2b18f3e-f36c-42e4-b42d-33a1ed22b5b5
Almuqati, Naif
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Kuznetsov, Vladimir L.
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Zhao, Yongxiang
ad91486b-c15f-4cd0-a380-0ba4f8c8d546
Jiang, Zheng
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Xiao, Tiancun
90161b4f-4483-4b4f-8db6-6614b001ac54
Bagabas, Abdulaziz
3360c6f2-b335-4848-afa7-ff60f0422199
Almegren, Hamid
381ca6b7-98d6-4621-966c-c67b3e094f8a
Edwards, Peter P.
1c8ab595-549c-4dca-b911-a46a94183e2b
France, Liam J, Du, Xian, Almuqati, Naif, Kuznetsov, Vladimir L., Zhao, Yongxiang, Jiang, Zheng, Xiao, Tiancun, Bagabas, Abdulaziz, Almegren, Hamid and Edwards, Peter P.
(2014)
The effect of lanthanum addition on the catalytic activity of γ-alumina supported bimetallic Co–Mo carbides for dry methane reforming.
Applied Petrochemical Research, 4 (1), .
(doi:10.1007/s13203-014-0058-x).
Abstract
The effect of lanthanum addition to γ-alumina supported bimetallic carbides has been studied for the reaction of dry methane reforming using four different lanthanum loading levels of 1, 5, 10 and 15 wt% of lanthanum. It has been demonstrated that the addition of lanthanum to supported bimetallic carbides at low loading levels (1 wt%) results in smaller carbide crystallite sizes compared to catalysts containing either no lanthanum or higher lanthanum loading levels (5–15 wt%). Increased lanthanum loading results in increased carbon dioxide desorption at 500–700 °C. Reactions indicated that increased lanthanum loading resulted in significantly reduced product yields due to increased reverse water–gas shift activity. All materials exhibited degrees of sintering during the reaction. It was found that cobalt reacted with lanthanum species to form a LaCoO3 phase. The 1 wt% catalyst possessed superior catalytic properties for dry methane reforming and was tested for 100 h. After an initial loss of activity, the catalyst appeared to stabilise, however, a decrease of ~3 % in the H2:CO ratio, evidence of carbide crystallite growth and carbon deposition, indicated that a shift in the side reactions had occurred during the reaction.
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The effect of lanthanum addition on the catalytic activity of γ-alumina supported bimetallic Co–Mo carbides for dry methane reforming.pdf
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e-pub ahead of print date: 27 April 2014
Published date: May 2014
Organisations:
Faculty of Engineering and the Environment
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Local EPrints ID: 364665
URI: http://eprints.soton.ac.uk/id/eprint/364665
ISSN: 2190-5525
PURE UUID: 1030466f-7490-4e41-8b24-593271ff0c3c
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Date deposited: 07 May 2014 14:27
Last modified: 15 Mar 2024 03:47
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Author:
Liam J France
Author:
Xian Du
Author:
Naif Almuqati
Author:
Vladimir L. Kuznetsov
Author:
Yongxiang Zhao
Author:
Tiancun Xiao
Author:
Abdulaziz Bagabas
Author:
Hamid Almegren
Author:
Peter P. Edwards
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