Analytical sensitivity enhancement by catalytic transformation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-005/02
B32B-027/04
B32B-027/12
G01N-007/00
G01N-021/00
출원번호
US-0387911
(2003-03-13)
등록번호
US-7255836
(2007-08-14)
발명자
/ 주소
Lehmann,Kevin
Chen,Yu
Yan,Wen Bin
출원인 / 주소
Trustees of Princeton University
대리인 / 주소
RatnerPrestia
인용정보
피인용 횟수 :
1인용 특허 :
6
초록
A device and method for quantifying an impurity in an input gas stream. The device and method employ a catalyst to convert the impurity to a detectable species in an output gas stream, and the concentration of the detectable species is then measured by means of a detector.
대표청구항▼
What is claimed: 1. A device for determining a level of concentration of at least one of oxygen or ozone in an input gas stream, the device comprising: a catalytic converter comprising a catalyst, the catalyst capable of converting substantially all of the oxygen or ozone into water in an output ga
What is claimed: 1. A device for determining a level of concentration of at least one of oxygen or ozone in an input gas stream, the device comprising: a catalytic converter comprising a catalyst, the catalyst capable of converting substantially all of the oxygen or ozone into water in an output gas stream; and a detector coupled to the catalytic converter and adapted to determine a level of concentration of the water in the output gas stream, wherein the detector comprises a cavity ring-down spectrometer. 2. The device of claim 1, wherein the catalyst is capable of converting oxygen into water. 3. The device of claim 1, wherein the catalyst is capable of converting ozone into water. 4. The device of claim 1, wherein the catalyst comprises nickel. 5. The device of claim 4, wherein the nickel comprises at least one of nickel wool and nickel gauze. 6. The device of claim 1, wherein the catalytic converter comprises a chamber containing the catalyst, the chamber having an inner surface consisting essentially of an inert material. 7. The device of claim 6, wherein the inert material comprises copper. 8. A device for determining a level of concentration of an impurity in an input gas stream, the device comprising: a catalytic converter comprising a catalyst, the catalyst selected to convert substantially all of the impurity into a detectable species in an output gas stream: a detector coupled to the catalytic converter and adapted to determine a level of concentration of the detectable species in the output gas stream, wherein the detector comprises a cavity ring-down spectrometer; and a hydrogen source coupled to the catalytic converter to provide a contact between hydrogen and the catalyst. 9. The device of claim 8, wherein the hydrogen source comprises a hydrogen generator. 10. The device of claim 8, wherein the hydrogen source comprises hydrogen pre-adsorbed on the catalyst. 11. A method for determining a level of concentration of at least one of oxygen or ozone in an input gas stream by use of a catalytic converter comprising a catalyst, the method comprising: inputting the input gas stream into the catalytic converter; converting the oxygen or ozone in the catalytic converter into water in an output gas stream; and detecting a presence of the water in the output gas stream by means of a cavity ring-down spectrometer. 12. The method of claim 11 further comprising detecting a presence of a background level of the water in the input gas stream either prior to the inputting step or substantially simultaneous with the inputting step. 13. The method of claim 11, wherein the detecting further comprises determining a level of concentration of the water. 14. The method of claim 11, wherein the converting comprises converting oxygen. 15. The method of claim 11, wherein the converting comprises converting ozone. 16. The method of claim 11, wherein the catalyst comprises nickel. 17. The method of claim 16, wherein the nickel comprises at least one of nickel wool and nickel gauze. 18. The method of claim 11, wherein the catalytic converter comprises a chamber having an inner surface consisting essentially of an inert material, the catalyst contained within the chamber. 19. The method of claim 18, wherein the inert material comprises copper. 20. A method for determining a level of concentration of an impurity in an input gas stream by use of a catalytic converter comprising a catalyst, the method comprising: inputting the input gas stream into the catalytic converter; converting the impurity into a detectable species in an output gas stream; detecting a presence of the detectable species in the output gas stream by means of a cavity ring-down spectrometer; providing a hydrogen source; and coupling the hydrogen source to the catalytic converter to provide a contact between hydrogen and the catalyst. 21. The method of claim 20, wherein the providing the hydrogen source comprises providing a hydrogen generator. 22. The method of claim 20, wherein the providing the hydrogen source comprises pre-absorbing hydrogen on the catalyst. 23. A device for determining a level of concentration of at least one of oxygen or ozone in an input gas stream, the device comprising: a catalytic converter comprising a catalyst of converting substantially all capable of the oxygen or ozone into water in an output gas stream; input means for inputting the input gas stream into the catalytic converter; and detecting means for detecting a presence of the water in the output gas stream, said detecting means comprising a cavity ring-down spectrometer. 24. The device of claim 23, wherein the catalyst is capable of converting oxygen into water. 25. The device of claim 23, wherein the catalyst is capable of converting ozone into water. 26. The device of claim 23, further comprising a hydrogen source coupled to the catalytic converter to provide a contact between hydrogen and the catalyst. 27. The device of claim 23, wherein the catalyst comprises nickel. 28. The device of claim 27, wherein the nickel comprises at least one of nickel wool and nickel gauze. 29. The device of claim 23, wherein the catalytic converter comprises delivery means for delivering substantially all of the oxygen or ozone to the catalyst without loss prior to the delivering. 30. The device of claim 29, wherein the delivery means comprises a chamber having an inner surface consisting essentially of an inert material, the catalyst contained within the chamber. 31. The device of claim 29, wherein the inert material comprises copper. 32. A device for determining a concentration of an impurity in an input gas stream, the device comprising: a catalytic converter comprising a catalyst for converting substantially all of the impurity into a detectable species in an output gas stream; input means for inputting the input gas stream into the catalytic converter; detecting means for detecting a presence of the detectable species in the output gas stream, said detecting means comprising a cavity ring-down spectrometer; a hydrogen generator coupled to the catalytic converter to provide a contact between hydrogen and the catalyst. 33. A device for determining a concentration of an impurity in an input gas stream, the device comprising: a catalytic converter comprising a catalyst for converting substantially all of the impurity into a detectable species in an output gas stream; input means for inputting the input gas stream into the catalytic converter; detecting means for detecting a presence of the detectable species in the output gas stream, said detecting means comprising a cavity ring-down spectrometer; and a hydrogen source coupled to the catalytic converter to provide a contact between hydrogen and the catalyst, wherein the catalyst comprises hydrogen pre-absorbed thereon.
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이 특허에 인용된 특허 (6)
Jenkins Anthony (c/o Analytical Instruments Limited ; London Rd. Pampisford ; Cambridge GB2) Lovelock James E. (Coombe Mill ; St. Giles on the Heath Launceston ; Cornwall both of GB2), Detection of tracer materials in the atmosphere.
Agustin Rogelio B. ; Numata Akihito,JPX ; Kawano Kazuya,JPX ; Takaku Yutaka,JPX ; Ishii Toshio,JPX, Diagnosing system and method of catalytic converter for controlling exhaust gas of internal combustion engine.
Penth, Bernd; Penth, Max; Penth, Felix, Measuring instrument and method for detecting the content of oil, hydrocarbons and oxidizable gases in air or compressed air.
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