Additive effect of noble metals on NiO-MgO solid solution in oxidative steam reforming of methane under atmospheric and pressurized conditions

Mohammad Nurunnabi, Yuya Mukainakano, Shigeru Kado, Baitao Li, Kimio Kunimori, Kimihito Suzuki, Ken Ichiro Fujimoto, Keiichi Tomishige

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

The effect of noble metals (M = Rh, Pt and Pd) added to NiO-MgO solid solution catalyst on catalytic activity and carbon deposition was investigated in oxidative steam reforming of methane under atmospheric and pressurized conditions. The noble metal addition enhanced methane conversion at low W/F condition, such as 0.13 g h mol-1, and the promoting effect was easily observed even for a small amount of addition, such as 0.035% Rh. This noble metal addition can maintain Ni species in a reduced state and it can enhance the methane activation ability and catalyst reducibility. Under pressurized conditions, it was found that the addition of Rh and Pt decreased carbon formation almost completely on Ni0.2Mg0.8O. The catalyst characterization suggests that noble metals-Ni alloy particles with the surface segregation of noble metals are formed on M/Ni0.2Mg 0.8O. This is related to high resistance to deactivation due to oxidation and carbon formation.

Original languageEnglish
Pages (from-to)145-156
Number of pages12
JournalApplied Catalysis A: General
Volume299
Issue number1-2
DOIs
Publication statusPublished - 2006 Jan 17
Externally publishedYes

Keywords

  • Carbon deposition
  • Deactivation
  • NiO-MgO solid solution
  • Oxidative steam reforming of methane
  • Pd
  • Pt
  • Rh
  • Self activation

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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