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US 8,007,642 B2Granted
Electrochemical gas generator for combustible gases
AssigneeDräger Safety AG & Co. KGaA
InventorsKerstin Caro, Peter Tschuncky, Herbert Kiesele
Life of this patent
Estimating the term…
Abstract
An electrochemical gas generator is provided with an electrolysis cell (1) with a housing, which is closed by a gas-permeable membrane (2) for the escape of the test or calibrating gas. A cathode (5) is provided formed of a noble metal, a mixture of noble metals or a material containing carbon. The cathode is in direct contact with an electrolyte (7) disposed in the housing. An anode (4) is provided formed of a noble metal, a mixture of noble metals or a material containing carbon. The anode is in direct contact with an electrolyte (7). The electrolyte (7) contains a carboxylic acid salt. A control unit (6) is provided that acts as a current source and which is connected to the electrodes (4, 5).
Claims20
An electrochemical gas generator comprising:
- an electrolysis cell with a housing closed by a gas-permeable membrane to allow for the escape of a test or a calibrating gas;
- an electrolyte containing a carboxylic acid salt, said electrolyte being in said housing;
- a cathode formed of one or more of a noble metal, a mixture of noble metals and a material containing carbon, said cathode being in direct contact with said electrolyte;
- an anode formed of one or more of a noble metal, a mixture of noble metals, and a material containing carbon, said anode being in direct contact with said electrolyte;
- and
- a control unit acting as a current source, said control unit being connected to said cathode and said anode, wherein a substance reacted at said anode is potassium acetate.
3 more elements
An electrochemical gas generator comprising:
- a gas impermeable housing with an opening;
- a gas-permeable membrane closing said opening, said gas-permeable membrane allowing for the release of a test gas or a calibrating gas;
- an electrolyte containing a carboxylic acid salt, said electrolyte being in said housing;
- a cathode consisting of one or more of a noble metal, a mixture of noble metals and a material containing carbon, said cathode being in direct contact with said electrolyte;
- an anode consisting of one or more of a noble metal, a mixture of noble metals, and a material containing carbon, said anode being in direct contact with said electrolyte;
- a control unit with electrical connections to said cathode and said anode for supplying current to said cathode and said anode in a controlled manner for a controlled generation of a test gas or a calibrating gas;
- and
- a substance reacted at said anode, said substance being in the form of a molding placed on said anode or in the form of a structure compressed around said anode wherein:
- said control unit includes a potentiostat;
- both said cathode and said anode include platinum and said anode comprises a mesh structure;
- and
- said molding with contacting platinum mesh of said anode directly adjoins said membrane.
9 more elements
An electrochemical gas generator comprising:
- an electrolysis cell with a housing closed by a gas-permeable membrane to allow for the escape of a test or a calibrating gas;
- an electrolyte containing a carboxylic acid salt, said electrolyte being in said housing;
- a cathode formed of one or more of a noble metal, a mixture of noble metals and a material containing carbon, said cathode being in direct contact with said electrolyte;
- an anode formed of one or more of a noble metal, a mixture of noble metals, and a material containing carbon, said anode being in direct contact with said electrolyte;
- a control unit acting as a current source, said control unit being connected to said cathode and said anode;
- and
- a substance reacted at said anode, said substance being in the form of a molding placed on said anode or in the form of a structure compressed around said anode.
4 more elements
An electrochemical gas generator comprising:
- an electrolysis cell with a housing closed by a gas-permeable membrane to allow for the escape of a test or a calibrating gas;
- an electrolyte containing a carboxylic acid salt, said electrolyte being in said housing, said electrolyte comprising a substance in which the carboxylic acid compound used is poorly soluble;
- a cathode formed of one or more of a noble metal, a mixture of noble metals and a material containing carbon, said cathode being in direct contact with said electrolyte;
- an anode formed of one or more of a noble metal, a mixture of noble metals, and a material containing carbon, said anode being in direct contact with said electrolyte;
- and
- a control unit acting as a current source, said control unit being connected to said cathode and said anode.
3 more elements
An electrochemical gas generator comprising:
- an electrolysis cell with a housing closed by a gas-permeable membrane to allow for the escape of a test or a calibrating gas;
- an electrolyte containing a carboxylic acid salt, said electrolyte being in said housing, said electrolyte being an organic electrolyte formed of a mixture of propylene carbonate and ethylene carbonate;
- a cathode formed of one or more of a noble metal, a mixture of noble metals and a material containing carbon, said cathode being in direct contact with said electrolyte;
- an anode formed of one or more of a noble metal, a mixture of noble metals, and a material containing carbon, said anode being in direct contact with said electrolyte;
- and
- a control unit acting as a current source, said control unit being connected to said cathode and said anode.
3 more elements
An electrochemical gas generator comprising:
- an electrolysis cell with a housing closed by a gas-permeable membrane to allow for the escape of a test or a calibrating gas;
- an electrolyte containing a carboxylic acid salt, said electrolyte being in said housing, said electrolyte comprising a room temperature ionic liquid including imidazolium salts;
- a cathode formed of one or more of a noble metal, a mixture of noble metals and a material containing carbon, said cathode being in direct contact with said electrolyte;
- an anode formed of one or more of a noble metal, a mixture of noble metals, and a material containing carbon, said anode being in direct contact with said electrolyte;
- and
- a control unit acting as a current source, said control unit being connected to said cathode and said anode.
3 more elements
Dependencies are inferred from the claim text.