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Optimization of a highly active nano-sized Pt/CeO2 catalyst via Ce(OH)CO3 for the water-gas shift reaction

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  • Jeong, Dae-Woon
  • Jang, Won-Jun
  • Shim, Jae-Oh
  • Han, Won-Bi
  • Kim, Hak-Min
  • Lee, Yeol-Lim
  • Bae, Jong Wook
  • Roh, Hyun-Seog

Abstract

Crystalline cerium hydroxy carbonate (CHC: Ce(OH)CO3) was prepared by a novel precipitation/digestion method at room temperature in air. The nano-sized CeO2 supports were obtained by the thermal decomposition of CHC and the Pt/CeO2 catalysts were prepared by an incipient wetness impregnation method. The pre-calcination temperature and aging time were optimized to obtain a highly active Pt/CeO2 catalyst for the water gas shift reaction (WGS). The Pt/CeO2 catalyst exhibited the highest CO conversion (82%) and the lowest activation energy (55 kJ/mol) at a very high gas hourly space velocity (GHSV) of 45,515 h−1 when the optimized synthesis parameter (pre-calcined temperature = 400 °C and aging time = 4 h) was used in the synthesis of CeO2. This is mainly due to the high BET surface area, nano-sized CeO2, and intimate interaction between Pt and CeO2.

Suggested Citation

  • Jeong, Dae-Woon & Jang, Won-Jun & Shim, Jae-Oh & Han, Won-Bi & Kim, Hak-Min & Lee, Yeol-Lim & Bae, Jong Wook & Roh, Hyun-Seog, 2015. "Optimization of a highly active nano-sized Pt/CeO2 catalyst via Ce(OH)CO3 for the water-gas shift reaction," Renewable Energy, Elsevier, vol. 79(C), pages 78-84.
    • Handle: RePEc:eee:renene:v:79:y:2015:i:c:p:78-84
    DOI: 10.1016/j.renene.2014.07.041
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    1. Shim, Jae-Oh & Jeong, Dae-Woon & Jang, Won-Jun & Jeon, Kyung-Won & Jeon, Byong-Hun & Cho, Seung Yeon & Roh, Hyun-Seog & Na, Jeong-Geol & Ko, Chang Hyun & Oh, You-Kwan & Han, Sang Sub, 2014. "Deoxygenation of oleic acid over Ce(1–x)Zr(x)O2 catalysts in hydrogen environment," Renewable Energy, Elsevier, vol. 65(C), pages 36-40.
    2. Roh, Hyun-Seog & Eum, Ic-Hwan & Jeong, Dae-Woon, 2012. "Low temperature steam reforming of methane over Ni–Ce(1−x)Zr(x)O2 catalysts under severe conditions," Renewable Energy, Elsevier, vol. 42(C), pages 212-216.
    3. Jeong, Dae-Woon & Jang, Won-Jun & Shim, Jae-Oh & Han, Won-Bi & Roh, Hyun-Seog & Jung, Un Ho & Yoon, Wang Lai, 2014. "Low-temperature water–gas shift reaction over supported Cu catalysts," Renewable Energy, Elsevier, vol. 65(C), pages 102-107.
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    1. Palma, Vincenzo & Ruocco, Concetta & Ricca, Antonio, 2018. "Oxidative steam reforming of ethanol in a fluidized bed over CeO2-SiO2 supported catalysts: effect of catalytic formulation," Renewable Energy, Elsevier, vol. 125(C), pages 356-364.

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