WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2005119246) NOx GAS SENSOR METHOD AND DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/119246    International Application No.:    PCT/US2005/018545
Publication Date: 15.12.2005 International Filing Date: 25.05.2005
IPC:
G01N 27/407 (2006.01)
Applicants: CERAMATEC, INC. [US/US]; 2425 South 900 West, Salt Lake City, UT 84119 (US) (For All Designated States Except US)
Inventors: NAIR, Balakrishman, G.; (US).
NACHLES, Jesse, A.; (US).
MIDDLEMAS, Michael; (US)
Agent: HULSE, Loren, R.; CERAMATEC, INC., 2425 South 900 West, Salt Lake City, Utah 84119 (US)
Priority Data:
60/574,622 26.05.2004 US
Title (EN) NOx GAS SENSOR METHOD AND DEVICE
(FR) PROCEDE ET DISPOSITIF CAPTEUR DE GAZ NOX
Abstract: front page image
(EN)The present invention is a method and apparatus for measuring the total NOx concentration in a gas stream utilizing the principles of a NOx sensor (22), i.e., mixed potential sensor (22). The exhaust gas is first conditioned by a catalyst assembly (12) that converts the various species of nitrogen oxide gases present to a fixed steady state concentration ratio of NO2/NO, where N02 is approximately 0 - 10% of the total NOx concentration present in the gas exhaust, thereby enabling the NOx sensor to generate a meaningful and reproducible determination of the concentration of total NOx present in the gas being measured. The catalyst assembly (12) also functions to oxidize any unburned combustibles such as CH4, CO, etc., and remove potential contaminants such as SO2.
(FR)L'invention concerne un procédé et un appareil servant à mesurer la concentration totale de NOx dans un flux gazeux, mettant en oeuvre les principes d'un capteur de NOx, c'est-à-dire d'un capteur à potentiel mixte. Le gaz d'échappement est d'abord conditionné par un ensemble catalyseur qui convertit les différentes espèces de gaz oxydes d'azote présentes en un rapport de concentration à l'état stationnaire fixe de NO2/NO, NO2 représentant environ 0 à 10 % de la concentration totale de NOx dans le gaz d'échappement, ce qui permet au capteur de NOx de déterminer précisément et de manière reproductible la concentration totale de NOx dans le gaz mesuré. L'ensemble catalyseur sert également à oxyder les combustibles non brûlés tels que CH4, CO, etc., et à éliminer les contaminants potentiels tels que SO2.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)