Preferential methanation of CO in a syngas involving CO2 at lower temperature range

Muhamad B.I. Choudhury; Shakeel Ahmed; Mazen A. Shalabi; Tomoyuki Inui

doi:10.1016/j.apcata.2006.08.008

Preferential methanation of CO in a syngas involving CO₂ at lower temperature range

Muhamad B.I. Choudhury
, Shakeel Ahmed^*
, Mazen A. Shalabi
, Tomoyuki Inui

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

105 Scopus citations

Abstract

Preferential elimination of CO in a model syngas involving CO₂ at a low temperature range was studied on a series of Ni-based multi-component composite catalysts supported on θ-alumina spheres. The catalysts were characterized by TPR to evaluate the change of reduction temperature with the catalyst composition, which corresponded to the catalytic performance. Performance of CO methanation on these catalysts was compared in a continuous flow reactor under atmospheric pressure. The Rh-modification onto the known highly active three-component methanation catalyst Ni-La₂O₃-Ru exhibited an evident enhancement in the activity. Complete conversion of CO to methane preferentially occurred on this four-component catalyst, Ni-La₂O₃-Ru-Rh, as low as 230 °C. As long as CO remained in the syngas, methanation of CO₂ was completely retarded. It was reconfirmed that La₂O₃ increases Ni dispersion, and Rh and Ru enhance H₂ adsorption, and induce the reduction of main catalyst component NiO_x at a low temperature range by hydrogen spillover. These are the causes of the very high performance of this catalyst.

Original language	English
Pages (from-to)	47-53
Number of pages	7
Journal	Applied Catalysis A: General
Volume	314
Issue number	1
DOIs	https://doi.org/10.1016/j.apcata.2006.08.008
State	Published - 25 Oct 2006

Bibliographical note

Funding Information:
The authors wish to acknowledge the support of Research Institute of King Fahd University of Petroleum and Minerals for this work. Thanks are also due to Mr. U.B. Majeed and K. Alam for their support in some of the experiments.

Keywords

Hydrogen spillover
Preferential methanation of CO
Rh-modified Ni-based composite catalyst
TPR measurements

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

Access to Document

10.1016/j.apcata.2006.08.008

Cite this

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title = "Preferential methanation of CO in a syngas involving CO2 at lower temperature range",

abstract = "Preferential elimination of CO in a model syngas involving CO2 at a low temperature range was studied on a series of Ni-based multi-component composite catalysts supported on θ-alumina spheres. The catalysts were characterized by TPR to evaluate the change of reduction temperature with the catalyst composition, which corresponded to the catalytic performance. Performance of CO methanation on these catalysts was compared in a continuous flow reactor under atmospheric pressure. The Rh-modification onto the known highly active three-component methanation catalyst Ni-La2O3-Ru exhibited an evident enhancement in the activity. Complete conversion of CO to methane preferentially occurred on this four-component catalyst, Ni-La2O3-Ru-Rh, as low as 230 °C. As long as CO remained in the syngas, methanation of CO2 was completely retarded. It was reconfirmed that La2O3 increases Ni dispersion, and Rh and Ru enhance H2 adsorption, and induce the reduction of main catalyst component NiOx at a low temperature range by hydrogen spillover. These are the causes of the very high performance of this catalyst.",

keywords = "Hydrogen spillover, Preferential methanation of CO, Rh-modified Ni-based composite catalyst, TPR measurements",

author = "Choudhury, \{Muhamad B.I.\} and Shakeel Ahmed and Shalabi, \{Mazen A.\} and Tomoyuki Inui",

note = "Funding Information: The authors wish to acknowledge the support of Research Institute of King Fahd University of Petroleum and Minerals for this work. Thanks are also due to Mr. U.B. Majeed and K. Alam for their support in some of the experiments.",

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AU - Ahmed, Shakeel

AU - Shalabi, Mazen A.

AU - Inui, Tomoyuki

N1 - Funding Information: The authors wish to acknowledge the support of Research Institute of King Fahd University of Petroleum and Minerals for this work. Thanks are also due to Mr. U.B. Majeed and K. Alam for their support in some of the experiments.

PY - 2006/10/25

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N2 - Preferential elimination of CO in a model syngas involving CO2 at a low temperature range was studied on a series of Ni-based multi-component composite catalysts supported on θ-alumina spheres. The catalysts were characterized by TPR to evaluate the change of reduction temperature with the catalyst composition, which corresponded to the catalytic performance. Performance of CO methanation on these catalysts was compared in a continuous flow reactor under atmospheric pressure. The Rh-modification onto the known highly active three-component methanation catalyst Ni-La2O3-Ru exhibited an evident enhancement in the activity. Complete conversion of CO to methane preferentially occurred on this four-component catalyst, Ni-La2O3-Ru-Rh, as low as 230 °C. As long as CO remained in the syngas, methanation of CO2 was completely retarded. It was reconfirmed that La2O3 increases Ni dispersion, and Rh and Ru enhance H2 adsorption, and induce the reduction of main catalyst component NiOx at a low temperature range by hydrogen spillover. These are the causes of the very high performance of this catalyst.

AB - Preferential elimination of CO in a model syngas involving CO2 at a low temperature range was studied on a series of Ni-based multi-component composite catalysts supported on θ-alumina spheres. The catalysts were characterized by TPR to evaluate the change of reduction temperature with the catalyst composition, which corresponded to the catalytic performance. Performance of CO methanation on these catalysts was compared in a continuous flow reactor under atmospheric pressure. The Rh-modification onto the known highly active three-component methanation catalyst Ni-La2O3-Ru exhibited an evident enhancement in the activity. Complete conversion of CO to methane preferentially occurred on this four-component catalyst, Ni-La2O3-Ru-Rh, as low as 230 °C. As long as CO remained in the syngas, methanation of CO2 was completely retarded. It was reconfirmed that La2O3 increases Ni dispersion, and Rh and Ru enhance H2 adsorption, and induce the reduction of main catalyst component NiOx at a low temperature range by hydrogen spillover. These are the causes of the very high performance of this catalyst.

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