DECOMPOSITION OF DICHLORODIFLUOROMETHANE ON TIO2/SIO2

被引：77

作者：

IMAMURA, S ^{[1
]}

SHIOMI, T ^{[1
]}

ISHIDA, S ^{[1
]}

UTANI, K ^{[1
]}

JINDAI, H ^{[1
]}

机构：

[1] NIPPON FINE GAS CO LTD,TAKAISHI,OSAKA 592,JAPAN

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1990年 / 29卷 / 09期

关键词：

D O I：

10.1021/ie00105a003

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Catalytic decomposition of dichlorodifluoromethane was carried out on various metal oxides. Acid catalysts such as zeolite, silica-alumina, and titania-silica exhibited high decomposition activities, whereas the activities of transition-metal oxides and CaO were low. Titania-silica exhibited the best performance among the acid catalysts investigated. Its acid property correlated well with its activity; the strong acid site with a Hammett acidity parameter H0of less than -5.6 was effective in decomposing dichlorodifluoromethane. Deactivation, however, occurred rapidly due to an attack of fluorine on silicon in titania-silica. A combination of titania-silica with CaO, which reacted with fluorine more readily than did silicon, protected the titania-silica from corrosion by fluorine, and the lifetime of this catalyst was prolonged. © 1990, American Chemical Society. All rights reserved.

引用

页码：1758 / 1761

页数：4

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