Oxidative decomposition of chloropentafluoroethane (CFC-115) in the presence of methane over γ-alumina-supported metal or metal oxide catalysts

Shizuka Tashiro, Hideo Nagata, Masahiro Kishida, Kouichi Mizuno, Satoshi Kushiyama, Katsuhiko Wakabayashi

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Abstract

The oxidative decomposition of CFC-115 in the presence of methane was studied over γ-alumina-supported metal or metal oxide catalysts. γ-Alumina-supported zinc(II) oxide, vanadium oxide, Cr(III) and Pt catalysts showed high activity in the decomposition of CFC-115. γ-Alumina-supported chromium(III) oxide and Pt catalysts differed from the other catalyst in that the conversion of CFC-115 increased with increase in the partial pressure of methane. It is considered that water produced by the combustion of methane provided this catalytic reaction for the decomposition of CFC-115. To verify this theory, the amount of water produced by conversion of methane on γ-alumina-supported Pt catalyst was calculated. Then, corresponding amount of water was fed instead of methane and the decomposition of CFC-115 in both cases was compared. It was found that without methane the CFC-115 conversion decreased. It was concluded that methane combustion not only provides water to CFC but also provides heat to the catalysts to accelerate the decomposition of CFC.

Original languageEnglish
Pages (from-to)399-402
Number of pages4
JournalSekiyu Gakkaishi (Journal of the Japan Petroleum Institute)
Volume42
Issue number6
DOIs
Publication statusPublished - Jan 1 1999

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All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology

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