Chromium free high temperature water-gas shift catalyst for the production of hydrogen from waste derived synthesis gas

Ajay Jha, Dae Woon Jeong, Yeol Lim Lee, Won Jun Jang, Jae Oh Shim, Kyung Won Jeon, Chandrashekhar V. Rode, Hyun Seog Roh

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18 Citations (Scopus)

Abstract

A comparative study between monometallic (Me-CeO2, Me = Zn, Cu, Fe and Co) and Ni-doped bimetallic (Me-Ni-CeO2) catalysts has been performed in the high temperature water-gas shift (HT-WGS) reaction using waste derived synthesis gas. Experimental results revealed that Me-Ni-CeO2 exhibited higher catalytic performance than simple Me-CeO2 catalysts. Within the Me-Ni-CeO2 series, Co-Ni-CeO2 exhibited excellent and stable catalytic performance (CO conversion > 90%) at a very high GHSV of 143,000 h-1. The existence of high concentration of Ce3+ ions and oxygen vacancies on the catalyst surface were responsible for the increased WGS activity of Co-Ni-CeO2. In addition, Co-Ni-CeO2 maintains a stable performance for 50 h. However, commercial Fe2O3-Cr2O3 catalyst showed a steep decline from their initial CO conversion values 15-10% within 5 h.

Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalApplied Catalysis A: General
Volume522
DOIs
Publication statusPublished - 2016 Jul 25

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

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