Synthesis of highly active nano-sized (1 wt.% Pt/CeO 2) catalyst for water gas shift reaction in medium temperature application

Hyun Seog Roh, Hari S. Potdar, Dae Woon Jeong, Ki Sun Kim, Jae Oh Shim, Won Jun Jang, Kee Young Koo, Wang Lai Yoon

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Abstract

A simultaneous precipitation/digestion method has been developed to precipitate a crystalline cerium (III) carbonate (Ce 2(CO 3) 3·8H 2O) by a controlled reaction between aqueous solutions of Ce(NO 3) 3·6H 2O and K 2CO 3 at room temperature. The nano-sized CeO 2 supports with crystallite size of 8.0 nm and high surface area of 131.6 m 2/g were successfully prepared through a decomposition of a cerium (III) carbonate at 400°C for 4 h. The digestion time was optimized to get highly active 1 wt.% Pt/CeO 2 catalyst for the water gas shift (WGS) reaction. 1 wt.% Pt/CeO 2 catalyst exhibited the highest CO conversion (82%) and 100% selectivity to CO 2 at 320°C at very high gas hourly space velocity (GHSV) of 45,625 h -1 if an optimized digestion time of 4 h was used for the synthesis of cerium (III) carbonate.

Original languageEnglish
Pages (from-to)113-118
Number of pages6
JournalCatalysis Today
Volume185
Issue number1
DOIs
Publication statusPublished - 2012 May 20

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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