| Project/Area Number |
06044162
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Institution | Yamaguchi University |
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Principal Investigator |
OGURA Kotaro Faculty of Engineering, Yamaguchi Univ.Professor, 工学部, 教授 (40035077)
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| Co-Investigator(Kenkyū-buntansha) |
侯 保栄 中国科学院, 海洋研究所, 教授
GESSER H.D Dept.of Chemistry, Manitoba Univ., 化学科, 教授
NAKAYAMA Masaharu Faculty of Engineering, Yamaguchi Univ.Research Associate, 工学部, 助手 (70274181)
NAGAOKA Tsutomu Faculty of Engineering, Yamaguchi Univ.Associate Professor, 工学部, 助教授 (00172510)
HOU B Inst.of Oceanology, Academia Sinica
候 保栄 中国科学院, 海洋研究所, 教授
張 経磊 中国科学院, 海洋研究所, 主任研究員
侯 文泰 青島海洋腐食研究所, 副所長
秦 蘊珊 中国科学院, 海洋研究所, 所長
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| Project Period (FY) |
1994 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥8,400,000 (Direct Cost: ¥8,400,000)
Fiscal Year 1996: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1995: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1994: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Keywords | green-house gas / ozone layr / electrochemistry / photochemistry / carbon dioxide / freon / pit corrosion / laminated film / scavenging / メタン / 二重修飾膜 / 腐食 / 光触媒 / クロロホロム / 可視光還元 / 酸化チタンガラス |
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| Research Abstract |
As pointed out, the conversion of the gases causing the rise in earth's temperature and the decomposition of ozone layr to innocuous species is a pressing and important subject. Taking thought for energy situation of advanced countries and the economical stuation of underdeveloped countries, it is almost imposible to control the discharge of these noxious gases by law. Accordingly, in the present study, a photocatalytic and/or a electrocatalytic processes to convert these gases to innocuous spesies, which can take place under low input energy, has been developed.
The electrochemical conversion of CO_2 to more complex compounds is assumed to be promising since this reaction occurs at room temperature and has the possibility of being developed into a process similar to photosynthesis. However, a fault of this technique is requirement of a highly negative overpotential. In order to mitigate the overpotential required for the reduction of CO_2, we have developed the electrocatalytic process at the modified electrode having two laminated films consisting of an inorganic conductor and a conducting polymer such as Prussian blue and polyaniline, respectively. This electrode gave the reduction products involving formic and lactic acids at a much lower overpotential than that hitherto acieved.
Chlorofluorocarbon (CFC-113), CHCl_3 and CCl_4 have been photolysed in the presence of H_2O,and the decomposed species scavenged by the reaction with a metal powder. The decomposition of these hazardous compounds was almost 100%. All chlorine atoms were fixed in the form of metal chloride, and no gaseous product existed except CO_2. The scavenging reaction of generated reactive species was brought about by the oxidation of the metal, and hence divalent and trivalent metal compounds showed only insignificant scavenging efficiency.
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