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 | |
| 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
Cite this
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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.
UR - http://www.scopus.com/inward/record.url?scp=85029606916&partnerID=8YFLogxK
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U2 - 10.1016/j.mcat.2016.12.028
DO - 10.1016/j.mcat.2016.12.028
M3 - Article
AN - SCOPUS:85029606916
VL - 433
SP - 145
EP - 152
JO - Molecular Catalysis
JF - Molecular Catalysis
SN - 2468-8231
ER -