Effect of the redox properties of support oxide over cobalt-based catalysts in high temperature water-gas shift reaction

Ajay Jha; Yeol Lim Lee; Won Jun Jang; Jae Oh Shim; Kyung Won Jeon; Hyun Suk Na; Hak Min Kim; Hyunseog Roh; Dae Woon Jeong; Sang Goo Jeon; Jeong Geol Na; Wang Lai Yoon

doi:10.1016/j.mcat.2016.12.028

Effect of the redox properties of support oxide over cobalt-based catalysts in high temperature water-gas shift reaction

Ajay Jha, Yeol Lim Lee, Won Jun Jang, Jae Oh Shim, Kyung Won Jeon, Hyun Suk Na, Hak Min Kim, Hyunseog Roh, Dae Woon Jeong, Sang Goo Jeon, Jeong Geol Na, Wang Lai Yoon

Division of Environmental Engineering

Research output: Contribution to journal › Article

9 Citations (Scopus)

Abstract

The present study focused on the effect of reducibility of support oxide (CeO₂, ZrO₂, TiO₂, and Al₂O₃) over the activity of cobalt-based catalysts in high temperature water-gas shift (HT-WGS) reaction. The H₂ temperature programmed reduction (TPR) and CO chemisorption characterization results showed that dispersion of cobalt over the support was increased with the increase of the reducibility of the support oxide. The supported catalysts were characterized by X-ray diffraction (XRD) and N₂ adsorption–desorption. The results indicated that the Co/CeO₂ catalyst possesses the highest surface area and metal dispersion in the series; Co/CeO₂ > Co/ZrO₂ > Co/Al₂O₃ > Co/TiO₂. The activity results showed that Co/CeO₂ was the highly active among the tested catalysts in the temperature range of 350–550 °C. Moreover, the time-on-stream study revealed that the Co/CeO₂ catalyst was relatively more stable than cobalt supported on ZrO₂ and Al₂O₃ oxides. The excellent activity and stability of the Co/CeO₂ catalyst were attributed to its high metal dispersion, which is found strongly dependent on the reducible nature of the support.

Original language	English
Pages (from-to)	145-152
Number of pages	8
Journal	Molecular Catalysis
Volume	433
DOIs	https://doi.org/10.1016/j.mcat.2016.12.028
Publication status	Published - 2017 Jan 1

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All Science Journal Classification (ASJC) codes

Catalysis
Process Chemistry and Technology
Physical and Theoretical Chemistry

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Jha, A., Lee, Y. L., Jang, W. J., Shim, J. O., Jeon, K. W., Na, H. S., Kim, H. M., Roh, H., Jeong, D. W., Jeon, S. G., Na, J. G., & Yoon, W. L. (2017). Effect of the redox properties of support oxide over cobalt-based catalysts in high temperature water-gas shift reaction. Molecular Catalysis, 433, 145-152. https://doi.org/10.1016/j.mcat.2016.12.028

Jha, Ajay ; Lee, Yeol Lim ; Jang, Won Jun ; Shim, Jae Oh ; Jeon, Kyung Won ; Na, Hyun Suk ; Kim, Hak Min ; Roh, Hyunseog ; Jeong, Dae Woon ; Jeon, Sang Goo ; Na, Jeong Geol ; Yoon, Wang Lai. / Effect of the redox properties of support oxide over cobalt-based catalysts in high temperature water-gas shift reaction. In: Molecular Catalysis. 2017 ; Vol. 433. pp. 145-152.

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abstract = "The present study focused on the effect of reducibility of support oxide (CeO2, ZrO2, TiO2, and Al2O3) over the activity of cobalt-based catalysts in high temperature water-gas shift (HT-WGS) reaction. The H2 temperature programmed reduction (TPR) and CO chemisorption characterization results showed that dispersion of cobalt over the support was increased with the increase of the reducibility of the support oxide. The supported catalysts were characterized by X-ray diffraction (XRD) and N2 adsorption–desorption. The results indicated that the Co/CeO2 catalyst possesses the highest surface area and metal dispersion in the series; Co/CeO2 > Co/ZrO2 > Co/Al2O3 > Co/TiO2. The activity results showed that Co/CeO2 was the highly active among the tested catalysts in the temperature range of 350–550 °C. Moreover, the time-on-stream study revealed that the Co/CeO2 catalyst was relatively more stable than cobalt supported on ZrO2 and Al2O3 oxides. The excellent activity and stability of the Co/CeO2 catalyst were attributed to its high metal dispersion, which is found strongly dependent on the reducible nature of the support.",

author = "Ajay Jha and Lee, {Yeol Lim} and Jang, {Won Jun} and Shim, {Jae Oh} and Jeon, {Kyung Won} and Na, {Hyun Suk} and Kim, {Hak Min} and Hyunseog Roh and Jeong, {Dae Woon} and Jeon, {Sang Goo} and Na, {Jeong Geol} and Yoon, {Wang Lai}",

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Effect of the redox properties of support oxide over cobalt-based catalysts in high temperature water-gas shift reaction. / Jha, Ajay; Lee, Yeol Lim; Jang, Won Jun; Shim, Jae Oh; Jeon, Kyung Won; Na, Hyun Suk; Kim, Hak Min; Roh, Hyunseog; Jeong, Dae Woon; Jeon, Sang Goo; Na, Jeong Geol; Yoon, Wang Lai.

In: Molecular Catalysis, Vol. 433, 01.01.2017, p. 145-152.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Effect of the redox properties of support oxide over cobalt-based catalysts in high temperature water-gas shift reaction

AU - Jha, Ajay

AU - Lee, Yeol Lim

AU - Jang, Won Jun

AU - Shim, Jae Oh

AU - Jeon, Kyung Won

AU - Na, Hyun Suk

AU - Kim, Hak Min

AU - Roh, Hyunseog

AU - Jeong, Dae Woon

AU - Jeon, Sang Goo

AU - Na, Jeong Geol

AU - Yoon, Wang Lai

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The present study focused on the effect of reducibility of support oxide (CeO2, ZrO2, TiO2, and Al2O3) over the activity of cobalt-based catalysts in high temperature water-gas shift (HT-WGS) reaction. The H2 temperature programmed reduction (TPR) and CO chemisorption characterization results showed that dispersion of cobalt over the support was increased with the increase of the reducibility of the support oxide. The supported catalysts were characterized by X-ray diffraction (XRD) and N2 adsorption–desorption. The results indicated that the Co/CeO2 catalyst possesses the highest surface area and metal dispersion in the series; Co/CeO2 > Co/ZrO2 > Co/Al2O3 > Co/TiO2. The activity results showed that Co/CeO2 was the highly active among the tested catalysts in the temperature range of 350–550 °C. Moreover, the time-on-stream study revealed that the Co/CeO2 catalyst was relatively more stable than cobalt supported on ZrO2 and Al2O3 oxides. The excellent activity and stability of the Co/CeO2 catalyst were attributed to its high metal dispersion, which is found strongly dependent on the reducible nature of the support.

AB - The present study focused on the effect of reducibility of support oxide (CeO2, ZrO2, TiO2, and Al2O3) over the activity of cobalt-based catalysts in high temperature water-gas shift (HT-WGS) reaction. The H2 temperature programmed reduction (TPR) and CO chemisorption characterization results showed that dispersion of cobalt over the support was increased with the increase of the reducibility of the support oxide. The supported catalysts were characterized by X-ray diffraction (XRD) and N2 adsorption–desorption. The results indicated that the Co/CeO2 catalyst possesses the highest surface area and metal dispersion in the series; Co/CeO2 > Co/ZrO2 > Co/Al2O3 > Co/TiO2. The activity results showed that Co/CeO2 was the highly active among the tested catalysts in the temperature range of 350–550 °C. Moreover, the time-on-stream study revealed that the Co/CeO2 catalyst was relatively more stable than cobalt supported on ZrO2 and Al2O3 oxides. The excellent activity and stability of the Co/CeO2 catalyst were attributed to its high metal dispersion, which is found strongly dependent on the reducible nature of the support.

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10.1016/j.mcat.2016.12.028