Oxidative steam reforming of ethanol for hydrogen production on M/Al 2O 3

Chih Cheng Hung, Shing Li Chen, Yi Kai Liao, Chih Hao Chen, Jeng Han Wang

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42 Citations (Scopus)

Abstract

In this work, we investigate oxidative steam reforming (OSR) of ethanol on a series of metals under various catalytic conditions (H 2O/ethanol and O 2/ethanol ratios) to understand the reaction mechanism and to optimize the catalytic conditions for optimal hydrogen production. There are three reaction pathways for OSR using these metals. Ethanol can be oxidized to acetaldehyde on Cu, Ag and Au, and it can be dehydrated to form ethylene on Co, Ni, Pd and Pt. Ethylene can form coke and degrade catalysts after the long-term OSR. In the third pathway, ethanol preferentially breaks its C-C bond and is further oxidized to CO or CO 2 on Ru, Rh and Ir, providing optimal hydrogen production. In addition, increasing H 2O/ethanol and O 2/ethanol ratios can improve catalytic activity, attributable to atomic oxygen from H 2O and O 2 efficiently rupturing the C-C bond of ethanol. This concept explains the improved performance of OSR on the CeO 2-modified catalyst, which shows better oxygen storage capability.

Original languageEnglish
Pages (from-to)4955-4966
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number6
DOIs
Publication statusPublished - 2012 Mar 1

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Keywords

  • Ethanol
  • Hydrogenation
  • Oxidative steam reforming
  • Oxygen/ethanol ratio
  • Water/ethanol ratio

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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