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Characterization of aerogel Ni/Al(2)O(3) catalysts and investigation on their stability for CH(4)-CO(2) reforming in a fluidized bed

Characterization of aerogel Ni/Al(2)O(3) catalysts and investigation on their stability for CH(4)-CO(2) reforming in a fluidized bed
Characterization of aerogel Ni/Al(2)O(3) catalysts and investigation on their stability for CH(4)-CO(2) reforming in a fluidized bed
The CH4-CO2 reforming was investigated in a fluidized bed reactor using nano-sized aerogel Ni/Al2O3 catalysts, which were prepared via a sol–gel method combined with a supercritical drying process. The catalysts were characterized with BET, XRD, H2-TPR and H2-TPD techniques. Compared with the impregnation catalyst, aerogel catalysts exhibited higher specific surface areas, lower bulk density, smaller Ni particle sizes, stronger metal-support interaction and higher Ni dispersion degrees. All tested aerogel catalysts showed better catalytic activities and stability than the impregnation catalyst. Their catalytic stability tested during 48 h reforming was dependent on their Ni loadings. Characterizations of spent catalysts indicated that only limited graphitic carbon formed on the aerogel catalyst, while massive graphitic carbon with filamentous morphology was observed for the impregnation catalyst, leading to significant catalytic activity degradation. An aerogel catalyst containing 10% Ni showed the best catalytic stability and the lowest rate of carbon deposition among the aerogel catalysts due to its small Ni particle size and strong metal-support interaction
CH4-CO2 reforming, aerogel Ni/Al2O3 catalyst, fluidized bed, carbon deposition
0378-3820
113-121
Hao, Zhigang
08031314-6143-48a1-aa93-5a9c243897fd
Zhu, Qingshan
a5c840c9-f376-4d2c-b4cb-ea2c47a0ef1d
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Hou, Baolin
695d860a-5940-4a1e-be98-5d0f8f69349f
Li, Hongzhong
c4943764-18bc-43d9-a2f2-8dfde5576b63
Hao, Zhigang
08031314-6143-48a1-aa93-5a9c243897fd
Zhu, Qingshan
a5c840c9-f376-4d2c-b4cb-ea2c47a0ef1d
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Hou, Baolin
695d860a-5940-4a1e-be98-5d0f8f69349f
Li, Hongzhong
c4943764-18bc-43d9-a2f2-8dfde5576b63

Hao, Zhigang, Zhu, Qingshan, Jiang, Zheng, Hou, Baolin and Li, Hongzhong (2009) Characterization of aerogel Ni/Al(2)O(3) catalysts and investigation on their stability for CH(4)-CO(2) reforming in a fluidized bed. Fuel Processing Technology, 90 (1), 113-121. (doi:10.1016/j.fuproc.2008.08.004).

Record type: Article

Abstract

The CH4-CO2 reforming was investigated in a fluidized bed reactor using nano-sized aerogel Ni/Al2O3 catalysts, which were prepared via a sol–gel method combined with a supercritical drying process. The catalysts were characterized with BET, XRD, H2-TPR and H2-TPD techniques. Compared with the impregnation catalyst, aerogel catalysts exhibited higher specific surface areas, lower bulk density, smaller Ni particle sizes, stronger metal-support interaction and higher Ni dispersion degrees. All tested aerogel catalysts showed better catalytic activities and stability than the impregnation catalyst. Their catalytic stability tested during 48 h reforming was dependent on their Ni loadings. Characterizations of spent catalysts indicated that only limited graphitic carbon formed on the aerogel catalyst, while massive graphitic carbon with filamentous morphology was observed for the impregnation catalyst, leading to significant catalytic activity degradation. An aerogel catalyst containing 10% Ni showed the best catalytic stability and the lowest rate of carbon deposition among the aerogel catalysts due to its small Ni particle size and strong metal-support interaction

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Published date: January 2009
Keywords: CH4-CO2 reforming, aerogel Ni/Al2O3 catalyst, fluidized bed, carbon deposition
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 352770
URI: http://eprints.soton.ac.uk/id/eprint/352770
ISSN: 0378-3820
PURE UUID: f19daba2-0d45-43f2-8a99-d648894ad846
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

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Date deposited: 20 May 2013 15:31
Last modified: 17 Dec 2019 01:36

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Contributors

Author: Zhigang Hao
Author: Qingshan Zhu
Author: Zheng Jiang ORCID iD
Author: Baolin Hou
Author: Hongzhong Li

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