Ru/Ni/MgAl 2O 4 catalysts for steam reforming of methane: Effects of Ru content on self-activation property

Seung Chan Baek; Ki Won Jun; Yun Jo Lee; Jae Dong Kim; Dal Young Park; Kwan Young Lee

doi:10.1007/s11164-011-0462-0

Ru/Ni/MgAl ₂O ₄ catalysts for steam reforming of methane: Effects of Ru content on self-activation property

Seung Chan Baek, Ki Won Jun, Yun Jo Lee, Jae Dong Kim, Dal Young Park, Kwan Young Lee

Department of Chemical and Biological Engineering

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

15 Citations (Scopus)

Abstract

The effects of Ru on the self-reducibility of Ru-doped Ni/MgAl ₂O ₄ catalysts, which do not need pre-reduction treatment with H ₂, were investigated in the steam reforming of methane (SRM). The Ru-promoted Ni/MgAl ₂O ₄ catalysts with various amounts of Ru (0-0.5 wt%) were prepared by stepwise impregnation and co-impregnation methods using hydrotalcite-like MgAl ₂O ₄ support. For comparison, Ru/MgAl ₂O ₄ catalysts with the same amount of Ru were also prepared by the impregnation method. The catalysts were characterized by the N ₂-sorption, XRD, H ₂-TPR, H ₂-chemisorption, and XPS methods. Ni/MgAl ₂O ₄ catalyst in the presence of even the trace amount of Ru (Ru content ≥0.05 wt%) showed higher conversion without pre-reduction as compared to Ru/MgAl ₂O ₄ catalysts in SRM under the same conditions. The self-activation of Ru-Ni/MgAl ₂O ₄ catalysts is mainly attributed to the spillover of hydrogen, which is produced on Ru at first and then reduces NiO species under reaction conditions. Besides, Ru doping makes the reduction of NiO easier. The stepwise impregnated Ru/Ni/MgAl ₂O ₄ catalyst produced superior performance as compared to co-impregnated Ru-Ni/MgAl ₂O ₄ catalyst for SRM.

Original language	English
Pages (from-to)	1225-1236
Number of pages	12
Journal	Research on Chemical Intermediates
Volume	38
Issue number	6
DOIs	https://doi.org/10.1007/s11164-011-0462-0
Publication status	Published - 2012 Apr

Keywords

H production
Ru/MgAl O4
Ru/Ni/MgAl O
Self-activation
Steam reforming of methane

ASJC Scopus subject areas

Chemistry(all)

Access to Document

10.1007/s11164-011-0462-0

Cite this

@article{f7c7adc65529411f8b2b948cb5f407b2,

title = "Ru/Ni/MgAl 2O 4 catalysts for steam reforming of methane: Effects of Ru content on self-activation property",

abstract = "The effects of Ru on the self-reducibility of Ru-doped Ni/MgAl 2O 4 catalysts, which do not need pre-reduction treatment with H 2, were investigated in the steam reforming of methane (SRM). The Ru-promoted Ni/MgAl 2O 4 catalysts with various amounts of Ru (0-0.5 wt%) were prepared by stepwise impregnation and co-impregnation methods using hydrotalcite-like MgAl 2O 4 support. For comparison, Ru/MgAl 2O 4 catalysts with the same amount of Ru were also prepared by the impregnation method. The catalysts were characterized by the N 2-sorption, XRD, H 2-TPR, H 2-chemisorption, and XPS methods. Ni/MgAl 2O 4 catalyst in the presence of even the trace amount of Ru (Ru content ≥0.05 wt%) showed higher conversion without pre-reduction as compared to Ru/MgAl 2O 4 catalysts in SRM under the same conditions. The self-activation of Ru-Ni/MgAl 2O 4 catalysts is mainly attributed to the spillover of hydrogen, which is produced on Ru at first and then reduces NiO species under reaction conditions. Besides, Ru doping makes the reduction of NiO easier. The stepwise impregnated Ru/Ni/MgAl 2O 4 catalyst produced superior performance as compared to co-impregnated Ru-Ni/MgAl 2O 4 catalyst for SRM.",

keywords = "H production, Ru/MgAl O4, Ru/Ni/MgAl O, Self-activation, Steam reforming of methane",

author = "Baek, {Seung Chan} and Jun, {Ki Won} and Lee, {Yun Jo} and Kim, {Jae Dong} and Park, {Dal Young} and Lee, {Kwan Young}",

year = "2012",

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doi = "10.1007/s11164-011-0462-0",

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T1 - Ru/Ni/MgAl 2O 4 catalysts for steam reforming of methane

T2 - Effects of Ru content on self-activation property

AU - Baek, Seung Chan

AU - Jun, Ki Won

AU - Lee, Yun Jo

AU - Kim, Jae Dong

AU - Park, Dal Young

AU - Lee, Kwan Young

PY - 2012/4

Y1 - 2012/4

N2 - The effects of Ru on the self-reducibility of Ru-doped Ni/MgAl 2O 4 catalysts, which do not need pre-reduction treatment with H 2, were investigated in the steam reforming of methane (SRM). The Ru-promoted Ni/MgAl 2O 4 catalysts with various amounts of Ru (0-0.5 wt%) were prepared by stepwise impregnation and co-impregnation methods using hydrotalcite-like MgAl 2O 4 support. For comparison, Ru/MgAl 2O 4 catalysts with the same amount of Ru were also prepared by the impregnation method. The catalysts were characterized by the N 2-sorption, XRD, H 2-TPR, H 2-chemisorption, and XPS methods. Ni/MgAl 2O 4 catalyst in the presence of even the trace amount of Ru (Ru content ≥0.05 wt%) showed higher conversion without pre-reduction as compared to Ru/MgAl 2O 4 catalysts in SRM under the same conditions. The self-activation of Ru-Ni/MgAl 2O 4 catalysts is mainly attributed to the spillover of hydrogen, which is produced on Ru at first and then reduces NiO species under reaction conditions. Besides, Ru doping makes the reduction of NiO easier. The stepwise impregnated Ru/Ni/MgAl 2O 4 catalyst produced superior performance as compared to co-impregnated Ru-Ni/MgAl 2O 4 catalyst for SRM.

AB - The effects of Ru on the self-reducibility of Ru-doped Ni/MgAl 2O 4 catalysts, which do not need pre-reduction treatment with H 2, were investigated in the steam reforming of methane (SRM). The Ru-promoted Ni/MgAl 2O 4 catalysts with various amounts of Ru (0-0.5 wt%) were prepared by stepwise impregnation and co-impregnation methods using hydrotalcite-like MgAl 2O 4 support. For comparison, Ru/MgAl 2O 4 catalysts with the same amount of Ru were also prepared by the impregnation method. The catalysts were characterized by the N 2-sorption, XRD, H 2-TPR, H 2-chemisorption, and XPS methods. Ni/MgAl 2O 4 catalyst in the presence of even the trace amount of Ru (Ru content ≥0.05 wt%) showed higher conversion without pre-reduction as compared to Ru/MgAl 2O 4 catalysts in SRM under the same conditions. The self-activation of Ru-Ni/MgAl 2O 4 catalysts is mainly attributed to the spillover of hydrogen, which is produced on Ru at first and then reduces NiO species under reaction conditions. Besides, Ru doping makes the reduction of NiO easier. The stepwise impregnated Ru/Ni/MgAl 2O 4 catalyst produced superior performance as compared to co-impregnated Ru-Ni/MgAl 2O 4 catalyst for SRM.

KW - H production

KW - Ru/MgAl O4

KW - Ru/Ni/MgAl O

KW - Self-activation

KW - Steam reforming of methane

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