SiO2/Ni and CeO2/Ni catalysts for single-stage water gas shift reaction

Sung Ho Kim, Ji Hye Chung, Yun Tae Kim, Jonghee Han, Sung Pil Yoon, SukWoo Nam, Tae Hoon Lim, Ho In Lee

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

SiO2- and CeO2-promoted Ni catalysts, as an alternative to traditional water gas shift (WGS) catalysts, were studied through various characterization methods. CO removal was enhanced by CeO2 promotion on Ni, but CeO2 affected methanation rather than the WGS reaction. Mobile surface oxygen, a typical property of CeO2, affected the Ni surface properties and weakened the bond strength between C and O atoms of carbon monoxide. On the contrary, in the case of SiO2-promoted Ni catalyst, the SiO2 supplied a hydroxyl group (-OH) to the Ni catalyst resulting in greater selectivity toward the WGS reaction than to methanation. Selectivity to the WGS reaction on the CeO2-promoted Ni catalyst was lower than that on Ni bulk catalyst, while the SiO2-promoted Ni catalyst showed higher selectivity to WGS than both the Ni bulk and CeO2-promoted Ni catalysts.

Original languageEnglish
Pages (from-to)3136-3140
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number7
DOIs
Publication statusPublished - 2010 Apr 1
Externally publishedYes

Fingerprint

Water gas shift
catalysts
Catalysts
shift
gases
water
methanation
Methanation
Catalyst selectivity
selectivity
promotion
Carbon monoxide
carbon monoxide
surface properties
Surface properties
Atoms
Oxygen
oxygen

Keywords

  • CO removal
  • Fuel processor
  • Methanation
  • Ni bulk catalyst
  • WGS

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

SiO2/Ni and CeO2/Ni catalysts for single-stage water gas shift reaction. / Kim, Sung Ho; Chung, Ji Hye; Kim, Yun Tae; Han, Jonghee; Yoon, Sung Pil; Nam, SukWoo; Lim, Tae Hoon; Lee, Ho In.

In: International Journal of Hydrogen Energy, Vol. 35, No. 7, 01.04.2010, p. 3136-3140.

Research output: Contribution to journalArticle

Kim, Sung Ho ; Chung, Ji Hye ; Kim, Yun Tae ; Han, Jonghee ; Yoon, Sung Pil ; Nam, SukWoo ; Lim, Tae Hoon ; Lee, Ho In. / SiO2/Ni and CeO2/Ni catalysts for single-stage water gas shift reaction. In: International Journal of Hydrogen Energy. 2010 ; Vol. 35, No. 7. pp. 3136-3140.
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AU - Kim, Sung Ho

AU - Chung, Ji Hye

AU - Kim, Yun Tae

AU - Han, Jonghee

AU - Yoon, Sung Pil

AU - Nam, SukWoo

AU - Lim, Tae Hoon

AU - Lee, Ho In

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AB - SiO2- and CeO2-promoted Ni catalysts, as an alternative to traditional water gas shift (WGS) catalysts, were studied through various characterization methods. CO removal was enhanced by CeO2 promotion on Ni, but CeO2 affected methanation rather than the WGS reaction. Mobile surface oxygen, a typical property of CeO2, affected the Ni surface properties and weakened the bond strength between C and O atoms of carbon monoxide. On the contrary, in the case of SiO2-promoted Ni catalyst, the SiO2 supplied a hydroxyl group (-OH) to the Ni catalyst resulting in greater selectivity toward the WGS reaction than to methanation. Selectivity to the WGS reaction on the CeO2-promoted Ni catalyst was lower than that on Ni bulk catalyst, while the SiO2-promoted Ni catalyst showed higher selectivity to WGS than both the Ni bulk and CeO2-promoted Ni catalysts.

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