NiO supported on Al2O3 and ZrO2 oxygen carriers for chemical looping steam methane reforming

Lishil Silvester, Andy Antzara, Goran Boskovic, Eleni Heracleous, Angeliki A. Lemonidou, Dragomir B. Bukur

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Two nickel based oxygen transfer materials (OTMs) supported on alumina and zirconia were tested for their potential use in chemical looping reforming. Zirconia supported (Ni-Zr) OTM exhibited good redox activity and stability during multiple CH4 reduction-air oxidation cycles in a thermogravimetric unit. Alumina supported OTM (Ni-Al) showed increasing degree of reduction during the first 12 cycles, due to reduction of NiAl2O4 species, followed by stable performance during the last 8 redox cycles. Hydrogen was produced by methane decomposition catalyzed by Ni on both OTMs. Decrease in carbon deposition and hydrogen production with increasing number of cycles is attributed to sintering of nickel during redox cycles. Steam methane reforming experiments in a fixed bed reactor showed that Ni-Zr OTM is superior to the Ni-Al OTM in terms of stability during 20 cycles of reduction/reforming and reoxidation at 650 °C and 850°C respectively.

Original languageEnglish
Pages (from-to)7490-7501
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number24
DOIs
Publication statusPublished - 29 Jun 2015

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Keywords

  • Alumina and zirconia supports
  • Carbon deposition
  • Chemical looping reforming
  • Hydrogen production
  • Ni based oxygen carriers

ASJC Scopus subject areas

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

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