Comparative study between fluidized bed and fixed bed reactors in methane reforming combined with methane combustion for the internal heat supply under pressurized condition

Keiichi Tomishige, Yuichi Matsuo, Yusuke Yoshinaga, Yasushi Sekine, Mohammad Asadullah, Kaoru Fujimoto

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

The effect of catalyst fluidization on the conversion of methane to syngas in methane reforming with CO2 and H2O in the presence of O2 under pressurized conditions was investigated over Ni and Pt catalysts. Methane and CO2 conversion in the fluidized bed reactor was higher than those in the fixed bed reactor over Ni0.15Mg0.85O catalyst under 1.0 MPa. This reactor effect was dependent on the catalyst properties. Conversion levels in the fluidized and fixed bed reactor were almost the same over MgO-supported Ni and Pt catalysts. It is suggested that this phenomenon is related to the catalyst reducibility. On a catalyst with suitable reducibility, the oxidized catalyst can be reduced with the produced syngas and the reforming activity regenerates in the fluidized bed reactor. Although serious carbon deposition was observed on Ni0.15Mg0.85O in the fixed bed reactor, it was inhibited in the fluidized bed reactor.

Original languageEnglish
Pages (from-to)225-238
Number of pages14
JournalApplied Catalysis A: General
Volume223
Issue number1-2
DOIs
Publication statusPublished - 2002

Keywords

  • Carbon deposition
  • Fluidized bed reactor
  • Methane combustion
  • Methane reforming
  • NiO-MgO solid solution catalysts

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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