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An in-depth understanding of the bimetallic effects and coked carbon species on an active bimetallic Ni(Co)/Al2O3 dry reforming catalyst

An in-depth understanding of the bimetallic effects and coked carbon species on an active bimetallic Ni(Co)/Al2O3 dry reforming catalyst
An in-depth understanding of the bimetallic effects and coked carbon species on an active bimetallic Ni(Co)/Al2O3 dry reforming catalyst
Ni/Al2O3, Co/Al2O3 and bimetallic Ni(Co)/Al2O3 catalysts were prepared using an impregnation method and employed in CO2 dry reforming of methane under coking-favored conditions. The spent catalysts were carefully characterized using typical characterization technologies and inelastic neutron scattering spectroscopy. The bimetallic catalyst exhibited a superior activity and anti-coking performance compared to Ni/Al2O3, while the most resistant to coking behavior was Co/Al2O3. The enhanced activity of the Ni(Co)/Al2O3 bimetallic catalyst is attributed to the reduced particle size of metallic species and resistance to forming stable filamentous carbon. The overall carbon deposition on the spent bimetallic catalyst is comparable to that of the spent Ni/Al2O3 catalyst, whereas the carbon deposited on the bimetallic catalyst is mainly less-stable carbonaceous species as confirmed by SEM, TPO, Raman and INS characterization. This study provides an in depth understanding of alloy effects in catalysts, the chemical nature of coked carbon on spent Ni-based catalysts and, hopefully, inspires the creative design of a new bimetallic catalyst for dry reforming reactions
Dry reforming, Syngas, bimetallic catalysts, biogas
1463-9076
17311-17319
Liao, Xin
b17c128f-a408-4d4a-82fd-fb902d1acb74
Gerdts, Rihards
5ceb321e-fb7b-4db3-a19d-d3d79e3d4187
Parker, Stewart F.
fa284f3b-cd03-4981-b968-0335285a7aec
Chi, Lina
ae1400a8-9860-4851-94d6-6981267c5afd
Zhao, Yongxiang
ad91486b-c15f-4cd0-a380-0ba4f8c8d546
Hill, Martyn
0cda65c8-a70f-476f-b126-d2c4460a253e
Guo, Junqiu
ec098123-bc59-445e-a5d9-460edc5f9d16
Jones, Martin O.
fea5068c-dfea-4857-a691-9d1b78f1654f
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Liao, Xin
b17c128f-a408-4d4a-82fd-fb902d1acb74
Gerdts, Rihards
5ceb321e-fb7b-4db3-a19d-d3d79e3d4187
Parker, Stewart F.
fa284f3b-cd03-4981-b968-0335285a7aec
Chi, Lina
ae1400a8-9860-4851-94d6-6981267c5afd
Zhao, Yongxiang
ad91486b-c15f-4cd0-a380-0ba4f8c8d546
Hill, Martyn
0cda65c8-a70f-476f-b126-d2c4460a253e
Guo, Junqiu
ec098123-bc59-445e-a5d9-460edc5f9d16
Jones, Martin O.
fea5068c-dfea-4857-a691-9d1b78f1654f
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab

Liao, Xin, Gerdts, Rihards, Parker, Stewart F., Chi, Lina, Zhao, Yongxiang, Hill, Martyn, Guo, Junqiu, Jones, Martin O. and Jiang, Zheng (2016) An in-depth understanding of the bimetallic effects and coked carbon species on an active bimetallic Ni(Co)/Al2O3 dry reforming catalyst. Physical Chemistry Chemical Physics, 18 (26), 17311-17319. (doi:10.1039/C6CP01089J).

Record type: Article

Abstract

Ni/Al2O3, Co/Al2O3 and bimetallic Ni(Co)/Al2O3 catalysts were prepared using an impregnation method and employed in CO2 dry reforming of methane under coking-favored conditions. The spent catalysts were carefully characterized using typical characterization technologies and inelastic neutron scattering spectroscopy. The bimetallic catalyst exhibited a superior activity and anti-coking performance compared to Ni/Al2O3, while the most resistant to coking behavior was Co/Al2O3. The enhanced activity of the Ni(Co)/Al2O3 bimetallic catalyst is attributed to the reduced particle size of metallic species and resistance to forming stable filamentous carbon. The overall carbon deposition on the spent bimetallic catalyst is comparable to that of the spent Ni/Al2O3 catalyst, whereas the carbon deposited on the bimetallic catalyst is mainly less-stable carbonaceous species as confirmed by SEM, TPO, Raman and INS characterization. This study provides an in depth understanding of alloy effects in catalysts, the chemical nature of coked carbon on spent Ni-based catalysts and, hopefully, inspires the creative design of a new bimetallic catalyst for dry reforming reactions

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Accepted/In Press date: 7 June 2016
e-pub ahead of print date: 7 June 2016
Published date: 14 July 2016
Keywords: Dry reforming, Syngas, bimetallic catalysts, biogas
Organisations: Energy Technology Group

Identifiers

Local EPrints ID: 398614
URI: http://eprints.soton.ac.uk/id/eprint/398614
ISSN: 1463-9076
PURE UUID: ae99ff1b-52f4-424a-863d-87df67fded04
ORCID for Martyn Hill: ORCID iD orcid.org/0000-0001-6448-9448
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

Catalogue record

Date deposited: 28 Jul 2016 13:23
Last modified: 18 Feb 2021 17:22

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Contributors

Author: Xin Liao
Author: Rihards Gerdts
Author: Stewart F. Parker
Author: Lina Chi
Author: Yongxiang Zhao
Author: Martyn Hill ORCID iD
Author: Junqiu Guo
Author: Martin O. Jones
Author: Zheng Jiang ORCID iD

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