Decomposition of dichlorodifluoromethane on PO{sub 4}-ZrO{sub 2} catalyst

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie00024a027· OSTI ID:142355

Imamura, Seiichiro; Shimizu, Hideaki; Haga, Toshiki; Tsuji, Seizaburo; Utani, Kazunori ^[1]; Watanabe, Makoto ^[2]

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1. Kyoto Inst. of Tech., Kyoto (Japan). Dept. of Chemistry
2. Chubu Univ., Kasugai (Japan). Dept. of Industrial Chemistry

The activity and durability of phosphate-zirconia composite catalysts were examined in the decomposition of dichlorodifluoromethane (Freon 12). Combination of phosphate group with zirconia produced acid sites which were effective for decomposing Freon 12: 100% conversion of Freon 12 was attained at a temperature as low as 300 C on the phosphate-zirconia catalyst which had a superacid nature. The phosphate group also protected the surface of zirconia from poisoning by inorganic fluorides produced during the reaction. An addition of water helped maintain the activity of the catalyst by eliminating inorganic fluorides accumulated on its surface.

• Sponsoring Organization: USDOE
• OSTI ID: 142355
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 12 Vol. 32; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CATALYTIC EFFECTS
CHLOROFLUOROCARBONS
DECOMPOSITION
EXPERIMENTAL DATA
PH VALUE
PHOSPHATES
SURFACE PROPERTIES
ZIRCONIUM OXIDES