| Project/Area Number |
03555181
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
有機工業化学
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| Research Institution | Toyama National College of Technology |
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Principal Investigator |
SHINODA Kiyonori Toyama National College of Technology Industrial Chemistry. Professor, 物質工学科, 教授 (50042833)
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| Co-Investigator(Kenkyū-buntansha) |
KAMAKURA Katsuyoshi Assistant Professor, 物質工学科, 助教授 (40042832)
MIYATANI Daisaku Assistant Professor, 工業化学科, 助教授 (20018980)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1992: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1991: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | CFC-112 / CFC-113 / Catalytic decomposition / Metal halide / Carbon monoxide / Carbon dioxide |
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| Research Abstract |
The catalytic decomposition of CFC-112 and CFC-113 (CFCs) in the presence of alcohols over metal halide supported on active carbon was carried out under various reaction conditions. The carbon atoms of the CF Cs ended up as CO and CO_2, the chlorine atoms as alkyl chloride and the fluorine atoms as hydrogen fluoride. These reactions can be written as follows.
CF_2ClCFCl_2 = CF_2CFCl + Cl_2 (1)
CF_2ClCFCl_2 + CH_3CH_2OH = CF_2ClCHFCl + CH_3CHO + HCl (2)
CF<@D22@>D2ClCFCl<@D22@>D2 + CH<@D23@>D2CH<@D22@>D2OH (] SY.scharw.[) CO + CO<@D22@>D2 + CH<@D23@>D2CH<@D22@>D2Cl + HF (3)
While the catalytic activity for the decomposition of CFCs over iron (III) halides on supported active carbon was gradually decreased with the passage of time, the durability of catalytic activity was greatly improved by the addition of CuCl_2 to FeF_3 supported on active carbon. The deactivation of catalyst may be responsible for the reaction of iron (III) halide and alcohol.
2 FeX_3 + 6 CH_3OH = Fe_2O_3 + 6 CH_3X + 3 H_2O (4) The improvement of catalytic durability with the addition of CuCl_2 to FeF_3 may be accounted for by the reaction of iron (III) oxide and copper (II) halides.
Fe_2O_3 + 3 CuX_2 = 2 FeX_3 + 3 CuO (5) Sequentially, copper (II) oxide reacts with hydrogen halide to convert into copper (II) halide.
CuO + 2 HX = CuX_2 + H_2O (6)
A series of reactions is established among the above reactions. From these experimental results, it could be anticipated that the durability of catalytic activity is continued for a long time, and the reaction system can be worked up in compact form.
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