Hydrolysis of chloropentafluoroethane (CFC-115) over alumina-zirconia catalysts prepared from boemite and γ-alumina

Hideo Nagata, Yoshitaka Sadatomi, Mariko Nagasakiya, Haruki Mori, Masahiro Kishida, Katsuhiko Wakabayashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The hydrolysis of chloropentafluoroethane (CFC-115) is investigated using alumina-zirconia catalysts prepared from boemite and γ-alumina composed of various different alumina contents. In the case of alumina-zirconia (alumina-zirconia(B)) catalysts prepared from boemite, a catalyst with an alumina content of 90wt% exhibited the highest rate of hydrolysis. The acidity of these catalysts is found to correlate to the rate of hydrolysis, however, the hydrolysis rate increases linearly with an increase in acidity. On the other hand, in the case of alumina-zirconia (alumina-zirconia(A)) catalysts prepared from γ-alumina, the hydrolysis rate and acidity increase with an increase in alumina content. The hydrolysis rate increases linearly with an increase in acidity. The hydrolysis rate and acidity over alumina-zirconia(A) are removed from the hydrolysis rate and amount of acidity over alumina-zirconia(B), respectively. The residual hydrolysis rate increases linearly with the residual acidity. Thus, alumina-zirconia(B) catalysts have been determined to bear two types of acidity.

Original languageEnglish
Pages (from-to)508-513
Number of pages6
JournalJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume43
Issue number6
DOIs
Publication statusPublished - Jul 13 2010

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Chlorofluorocarbons
Aluminum Oxide
Zirconia
Hydrolysis
Alumina
Catalysts
Acidity
zirconium oxide
chloropentafluoroethane

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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Hydrolysis of chloropentafluoroethane (CFC-115) over alumina-zirconia catalysts prepared from boemite and γ-alumina. / Nagata, Hideo; Sadatomi, Yoshitaka; Nagasakiya, Mariko; Mori, Haruki; Kishida, Masahiro; Wakabayashi, Katsuhiko.

In: JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, Vol. 43, No. 6, 13.07.2010, p. 508-513.

Research output: Contribution to journalArticle

Nagata, Hideo ; Sadatomi, Yoshitaka ; Nagasakiya, Mariko ; Mori, Haruki ; Kishida, Masahiro ; Wakabayashi, Katsuhiko. / Hydrolysis of chloropentafluoroethane (CFC-115) over alumina-zirconia catalysts prepared from boemite and γ-alumina. In: JOURNAL OF CHEMICAL ENGINEERING OF JAPAN. 2010 ; Vol. 43, No. 6. pp. 508-513.
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AU - Kishida, Masahiro

AU - Wakabayashi, Katsuhiko

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