Decomposition of chlorofluorocarbons over metal phosphate catalysts part I. Decomposition of CCI2F2 over metal phosphate catalysts

Yusaku Takita, Maiko Ninomiya, Rie Matsuzaki, Hironori Wakamatsu, Hiroyasu Nishiguchi, Tatsumi Ishihara

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

In the decomposition of chlorofluorocarbons (CFCs), HF produced in the decomposition reacts with and deactivates the catalyst. Metal phosphates were chosen as the catalyst from ΔG calculations. Zr-P-O and AlPO4 showed high catalytic activity for the decomposition of CCl2F2 above 350°C. The essential reaction of the decomposition is hydrolysis. On increasing the CCl2F2 concentration in the feed, the formation of CClF3 as a by-product is promoted. ALPO4 has both weak acid sites and those of intermediate strength and these acid sites may participate in the hydrolysis of CCl2F2. No reaction between AlPO4 and formed HF was observed during 1000 h reaction at 400°C, ALPO4 promises to be of practical use.

Original languageEnglish
Pages (from-to)2367-2372
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume1
Issue number9
DOIs
Publication statusPublished - May 1 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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