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1. 发明专利

JPH08290052A MEMBRANE PHOTOCATALYTIC CHEMICAL CONVERSION DEVICE 失效
公开(公告)号：JPH08290052A
公开(公告)日：1996-11-05
申请号：JP9929295
申请日：1995-04-25
申请人： HITACHI LTD , CHIKYU KANKYO SANGYO GIJUTSU
发明人： ICHIKAWA SHINICHI , DOI RYOTA , HIDA HIROSHI , MIYADERA HIROSHI
IPC分类号： C01B3/04 , B01J19/00 , B01J19/08 , B01J21/06 , B01J35/02
摘要： PURPOSE: To form hydrogen at room temp. from water, seawater or an electrolyte aq. soln. by utilizing a light source containing ultraviolet rays or solar rays and to further chemically convert CO2 at room temp. to use the same as resources. CONSTITUTION: In an apparatus having a TiO2 membrane photocatalyst 2, a proton separation membrane 8 and an electrochemical catalyst 9 successively arranged in a soln., a light source 1 irradiating the membrane photocatalyst with light and the circuit connecting the membrane photocatalyst 2 and the electrochemical catalyst 9 as main constitutional elements, the following process is performed at room temp. Electrons and holes are generated by irradiating the membrane photocatalyst 2 with light and the soln. brought into contact with the membrane photocatalyst 2 is reacted with the holes to generate protons and oxygen and the proton separation membrane 8 separates protons from oxygen to permit them to transmit and protons are electrochemically bonded to the surface of the electrochemical catalyst 9 to form hydrogen. When CO2 is supplied, the reduction reaction of CO2 is generated on the surface of the electrochemical catalyst 9 by protons and electrons to form CO and hydrocarbon.

2. 发明专利

JPH07188961A CARBON DIOXIDE REDUCING ELECTRODE AND CARBON DIOXIDE CONVERTER 失效
公开(公告)号：JPH07188961A
公开(公告)日：1995-07-25
申请号：JP33099593
申请日：1993-12-27
申请人： HITACHI LTD , CHIKYU KANKYO SANGYO GIJUTSU
发明人： DOI RYOTA , ICHIKAWA SHINICHI , HIDA HIROSHI , MIYADERA HIROSHI
IPC分类号： B01J23/89 , C25B3/04 , C25B11/06
摘要： PURPOSE:To reduce CO2 with high current efficiency at the time of reducing CO2 electrochemically and photoelectrochemically to reduce it into hydrocarbons and alcohols by using an electrode obtained by coating the surface of a copper sheet with a specified metal oxide as the reducing electrode. CONSTITUTION:A KHCO3 soln. 2 is filled in an electrolytic cell 1 provided with a light transmitting window, a photoelectrode 4 as a thin film of Pt or an n-type optical semiconductor is used as an anode, an electrode 3 obtained by coating the surface of metallic copper with a conductive oxide consisting of at least one kind of metallic oxide among ZnO, Fe2O3, TiO, SnO2, IrO2, RuO2, ReO2, PbO2, etc., and having

3. 发明专利

JPH05311476A 失效
公开(公告)号：JPH05311476A
公开(公告)日：1993-11-22
申请号：JP12033792
申请日：1992-05-13
申请人： HITACHI LTD , CHIKYU KANKYO SANGYO GIJUTSU
发明人： MORI TOSHIKATSU , DOI RYOTA , HIDA HIROSHI , MIYADERA HIROSHI
IPC分类号： B01J19/12 , C23C30/00 , C25B3/04 , C25B11/04 , C25B11/06
摘要： PURPOSE:To reduce carbon dioxide, carbonic acid, carbonate ion, bicarbonate ion, carboxylic acid, aldehyde or the like at high current efficiency. CONSTITUTION:An electrode on which the surface of metal copper and the surface of a metal belonging a group coexist is used as an electrode of an electrochemical reduction device. An electrochemical or photoelectro-chemical reactor consists of the electrode as a cathode 3 and a platinum plate, n-type photosemiconductive tin film or the like as an anode 4. Thus, as carbon dioxide, carbonate ion, formic acid or the like is selectively reduced to hydrocarbon and alcohol by utilizing solar light energy, the device contributes to mitigate the problem of warming of the earth's atmosphere.

4. 发明专利

JPH08296077A GASEOUS CARBON DIOXIDE CONVERTING DEVICE 失效
公开(公告)号：JPH08296077A
公开(公告)日：1996-11-12
申请号：JP10497795
申请日：1995-04-28
申请人： HITACHI LTD , CHIKYU KANKYO SANGYO GIJUTSU
发明人： DOI RYOTA , ICHIKAWA SHINICHI , HIDA HIROSHI
IPC分类号： B01D53/32 , B01J19/00 , C25B1/00 , C25B1/21 , C25B3/04
摘要： PURPOSE: To execute a redox reaction of gaseous CO2 with high efficiency by forming a photocatalyst layer on a surface of an anode, making a cathode copper (alloy), introducing an ultraviolet rays in the anode, introducing a gaseous CO2 in the cathode and impressing pulse voltage by specifying a pulse interval and a pulse voltage. CONSTITUTION: The anode 1 and the cathode 2 are arranged in a cell 5 by interposing a solid electrolytic layer 3 and immersed in an electrolyte 4. The ultraviolet rays are supplied to the anode 1 from a light source 7 through a light transmission window 6. The gaseous CO2 is supplied to the cathode 2 side from a gaseous CO2 supply pipe 8. The pulse voltage having 1-1800sec pulse interval and -5-15V voltage is impressed between the anode 1 and the cathode 2 from a pulse power source 10. Protons generated at the anode 1 are moved to the cathode 2 to convert the gaseous CO2 into methane, ethylene, etc. A reduced product and a by-product adsorbed on a surface of the cathode 2 can be removed by impressing the pulse. A reaction active point is recovered and an economical and stable reducing reaction is executed.

5. 发明专利

DE3582716D1 未知
公开(公告)号：DE3582716D1
公开(公告)日：1991-06-06
申请号：DE3582716
申请日：1985-10-30
申请人： HITACHI LTD
发明人： TSUKUI TSUTOMU , YASUKAWA SABURO , SHIMIZU TOSHIO , DOI RYOTA , YAMAGUCHI MOTOO , IWAASA SHUZOU
IPC分类号： H01M8/04
摘要： A liquid fuel cell having a circulation system for a fuel mixture comprising fuel and water, which comprises a first tank (101) containing water or a water-rich fuel mixture comprising water and fuel, a second tank (102) containing fuel or a fuel-rich mixture comprising water and fuel, a first detector (12) for detecting the liquid level of the fuel mixture in the circulation system, a second detector (13) for detecting a fuel concentration of the fuel mixture in the circulation system, or an output from the fuel cell, or a load current of the fuel cell, a valve means (111) for controlling flow of the water or the water-rich mixture in the first tank to the circulation system in accordance with the output from the first detector (12), and a valve means (112) for controlling flow of the fuel or the fuel-rich mixture in the second tank (102) to the circulation system in accordance with the output from the second detector (13). The liquid fuel cell can be stably and efficiently operated for a prolonged time in spite of different consumption rates of fuel and water even if the load current or operating temperature of the fuel cell or the temperature or humidity of the atmosphere is changed.

6. 发明专利

CA1198475A FUEL CELL USING ORGANIC, HIGH-MOLECULAR ELECTROLYTE 未知
公开(公告)号：CA1198475A
公开(公告)日：1985-12-24
申请号：CA432586
申请日：1983-07-18
申请人： HITACHI LTD
发明人： TSUKUI TSUTOMU , SHIMIZU TOSHIO , DOI RYOTA , TSUTSUMI YASUYUKI
IPC分类号： H01M8/08 , H01M8/00 , H01M8/02 , H01M8/04 , H01M8/10 , H01M8/22
摘要： The invention provides a fuel cell employing an organic, high-molecular electrolyte. The fuel cell of the present invention can prevent the leakage of the electrolyte from an electrolyte chamber so that electrical short-circuit between an anode and a cathode can be avoided. The resulting cell is simple in design but extremely effective in operation.

7. 发明专利

DE3382719T2 未知
公开(公告)号：DE3382719T2
公开(公告)日：1994-02-10
申请号：DE3382719
申请日：1983-07-28
申请人： HITACHI LTD
发明人： TSUKUI TSUTOMU , SHIMIZU TOSHIO , DOI RYOTA , TSUTSUMII YASUYUKI
IPC分类号： H01M8/08 , H01M8/00 , H01M8/02 , H01M8/04 , H01M8/10 , H01M8/22
摘要： In a fuel cell using as an electrolyte an organic, high-molecular electrolyte (23), leakage of the electrolyte (23) from the electrolyte chamber is prevented so that an electrical short-circuit between anode (28) and cathode (21) can be avoided.

8. 发明专利

DE3382719D1 未知
公开(公告)号：DE3382719D1
公开(公告)日：1993-11-25
申请号：DE3382719
申请日：1983-07-28
申请人： HITACHI LTD
发明人： TSUKUI TSUTOMU , SHIMIZU TOSHIO , DOI RYOTA , TSUTSUMII YASUYUKI
IPC分类号： H01M8/08 , H01M8/00 , H01M8/02 , H01M8/04 , H01M8/10 , H01M8/22
摘要： In a fuel cell using as an electrolyte an organic, high-molecular electrolyte (23), leakage of the electrolyte (23) from the electrolyte chamber is prevented so that an electrical short-circuit between anode (28) and cathode (21) can be avoided.

9. 发明专利

DE3566063D1 FUEL CELL 未知
公开(公告)号：DE3566063D1
公开(公告)日：1988-12-08
申请号：DE3566063
申请日：1985-03-22
申请人： HITACHI LTD
发明人： SHIMIZU TOSHIO , SATOO TAKANORI , DOI RYOTA , YAMAGUCHI MOTOO , TSUKUI TSUTOMU , YOSHIOKA YOSHIO
IPC分类号： H01M8/02 , H01M8/24
摘要： A fuel cell made up of a pile of unit cells, each consisting of a pair of cell element (27) and separator (29) packed in a cell frame (12), in which there are formed a fuel feed path (13, 14) and oxide product evacuation path (20) in the piling direction. The cell frame is provided between its inner edge offsets and the outer edges of the cell element and separator with inner packings (21a, 21 b), and further provided near its outer edge on one side with an outer packing (23). The sealing structure perfectly prevents a fuel leak, and yet allows compactness and easy assembling process.

10. 发明专利

CA1257647A LIQUID FUEL CELL 未知
公开(公告)号：CA1257647A
公开(公告)日：1989-07-18
申请号：CA494271
申请日：1985-10-30
申请人： HITACHI LTD
发明人： TSUKUI TSUTOMU , YASUKAWA SABURO , SHIMIZU TOSHIO , DOI RYOTA , YAMAGUCHI MOTOO , IWAASA SHUZOU
IPC分类号： H01M8/04
摘要： A liquid fuel cell having a circulation system for a fuel mixture comprising fuel and water, which comprises a first tank containing water or a water-rich fuel mixture comprising water and fuel, a second tank containing fuel or a fuel-rich mixture comprising water and fuel, a first detector for detecting the liquid level of the fuel mixture in the circulation system, a second detector for detecting a fuel concentration of the fuel mixture in the circulation system, or an output from the fuel cell, or a load current of the fuel cell, a valve means for controlling flow of the water or the water-rich mixture in the first tank to the circulation system in accordance with the output from the first detector, and a valve means for controlling flow of the fuel or the fuelrich mixture in the second tank to the circulation system in accordance with the output from the second detector, can be stably and efficiently operated for a prolonged time in spite of different consumption rates of fuel and water even if the load current or operating temperature of the fuel cell or the temperature or humidity of the atmosphere is changed.

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