[특허]Oxygen sensor for monitoring gas mixtures containing hydrocarbons

Oxygen sensor for monitoring gas mixtures containing hydrocarbons 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01M-008/18
출원번호	US-0288850 (1994-08-11)
발명자 / 주소	Ruka Roswell J. (Pittsburgh PA) Basel Richard A. (Pittsburgh PA)
출원인 / 주소	Westinghouse Electric Corporation (Pittsburgh PA 02)
인용정보	피인용 횟수 : 109 인용 특허 : 0

초록 ▼

A gas sensor measures O2 content of a reformable monitored gas containing hydrocarbons H2O and/or CO2, preferably in association with an electrochemical power generation system. The gas sensor has a housing communicating with the monitored gas environment and carries the monitored gas through an integral catalytic hydrocarbon reforming chamber containing a reforming catalyst, and over a solid electrolyte electrochemical cell used for sensing purposes. The electrochemical cell includes a solid electrolyte between a sensor electrode that is exposed to the monitored gas, and a reference electrode that is isolated in the housing from the monitored gas and is exposed to a reference gas environment. A heating element is also provided in heat transfer communication with the gas sensor. A circuit that can include controls operable to adjust operations via valves or the like is connected between the sensor electrode and the reference electrode to process the electrical signal developed by the electrochemical cell. The electrical signal varies as a measure of the equilibrium oxygen partial pressure of the monitored gas. Signal noise is effectively reduced by maintaining a constant temperature in the area of the electrochemical cell and providing a monitored gas at chemical equilibria when contacting the electrochemical cell. The output gas from the electrochemical cell of the sensor is fed back into the conduits of the power generating system.

대표청구항 ▼

A method to assist in monitoring O:C atomic ratios of a reformable fuel mixture to be conditioned prior to entering a generator chamber of a high temperature, solid oxide electrolyte fuel cell generator, comprising: (a) providing a reformable fuel mixture (F) comprising hydrocarbons and H2O and/or CO2; (b) passing the reformable fuel mixture (F) as a monitored gas (M) through an oxygen gas sensor (10), said oxygen gas sensor comprising a housing (12) positioned within or exterior to a monitored gas environment having an inlet (14) to monitor a gas containing hydrocarbons and oxygen species to enter said housing, a catalytic hydrocarbon reforming chamber (50) containing a reforming catalyst (54) positioned within said housing having an inlet (52) for said monitored gas to enter said reforming chamber and an outlet (56) for said monitored gas to exit said reforming chamber, a tubular, close ended, solid electrolyte, electrochemical, gas sensor cell (20) positioned within said housing at said reforming chamber outlet, said solid electrolyte, electrochemical, gas sensor cell (20) including a solid electrolyte (22) disposed between a sensor electrode (26) exposed to said monitored gas environment and a reference electrode (30) isolated from said monitored gas environment and exposed to a reference gas environment (R), heating means (34) in heat communication with the reforming chamber and electrochemical cell, and, circuit means (38) connected between said sensor electrode and said reference electrode to process an electrical signal between the electrodes, the electrical signal providing a measure of the partial pressure of oxygen said monitored gas; (c) providing an oxygen reference gas (R) at a known partial pressure of oxygen to the reference electrode; and, (d) measuring the EMF as a function of the ratio of the partial pressure of oxygen of the reformable fuel mixture to that of the reference gas.

이 특허를 인용한 특허 (109)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Oxygen sensor for monitoring gas mixtures containing hydrocarbons 원문보기

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Oxygen sensor for monitoring gas mixtures containing hydrocarbons 원문보기

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연구과제 타임라인

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