Oxides of nitrogen gas sensors and methods

Details Oxides of nitrogen gas sensors and methods Oxides of nitrogen gas sensors and methods

2005-09-02

2010-10-26

Nguyen, Nam X (Department: 1795)

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

For nitrogen or nitrogen containing compound

C204S426000, C204S429000, C205S783500, C205S784000, C073S023310, C073S023320

Reexamination Certificate

active

07820028

ABSTRACT:
Apparatus and methods for measuring NOxconcentrations are disclosed. One method includes the steps of providing a gas stream having a NO concentration and a NO2concentration, wherein a sum of the NO concentration and the NO2concentration is a total NOxconcentration; contacting the gas stream with a first zirconium oxide based oxygen sensor at a first temperature to achieve a first NO:NO2equilibrium at the first temperature; contacting the gas stream with a second zirconium oxide based oxygen sensor at a second temperature to achieve a second NO:NO2equilibrium at the second temperature; and determining the total NOxconcentration by measuring a response of the first zirconium oxide based oxygen sensor to achieve the first NO:NO2equilibrium and a response of the second zirconium oxide based oxygen sensor to achieve the second NO:NO2equilibrium. The second temperature is different than the first temperature.

REFERENCES:
patent: 3843400 (1974-10-01), Radford et al.
patent: 4199425 (1980-04-01), Sinkevitch
patent: 4272329 (1981-06-01), Hetrick et al.
patent: 4272330 (1981-06-01), Hetrick
patent: 4272331 (1981-06-01), Hetrick
patent: 4358950 (1982-11-01), Chang
patent: 4545889 (1985-10-01), Franx
patent: 4863583 (1989-09-01), Kurachi et al.
patent: 4927517 (1990-05-01), Mizutani et al.
patent: 5290405 (1994-03-01), Joshi et al.
patent: 5401372 (1995-03-01), Liu et al.
patent: 5736028 (1998-04-01), Hjortsberg et al.
patent: 5897759 (1999-04-01), Kurosawa et al.
patent: 6019881 (2000-02-01), Kurosawa et al.
patent: 6062064 (2000-05-01), Yoshida et al.
patent: 6071393 (2000-06-01), Oshima et al.
patent: 6126902 (2000-10-01), Kunimoto et al.
patent: 6136170 (2000-10-01), Inoue et al.
patent: 6143165 (2000-11-01), Kurosawa et al.
patent: 6238536 (2001-05-01), Lundgren et al.
patent: 6287439 (2001-09-01), Kato et al.
patent: 6303011 (2001-10-01), Gao et al.
patent: 6319377 (2001-11-01), Hasei et al.
patent: 6344134 (2002-02-01), Yamada et al.
patent: 6419818 (2002-07-01), Kato et al.
patent: 6533911 (2003-03-01), Fujita et al.
patent: 6551497 (2003-04-01), Gao et al.
patent: 6764591 (2004-07-01), Dutta et al.
patent: 6773565 (2004-08-01), Kunimoto et al.
patent: 7217355 (2007-05-01), Nair et al.
patent: 7258820 (2007-08-01), Elangovan et al.
patent: 7259126 (2007-08-01), Gordon et al.
patent: 2002/0017461 (2002-02-01), Kunimoto et al.
patent: 19838028 (2000-03-01), None
patent: 0257842 (1988-03-01), None
Szabo et al., “Strategies for total NOx measurement with minimal CO interference utilizing a microporus zeolitic catalytic filter,” Sensors and Actuators, B 88, pp. 168-177, 2003.

Affiliated with

Also associated with

Rating

Oxides of nitrogen gas sensors and methods does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oxides of nitrogen gas sensors and methods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxides of nitrogen gas sensors and methods will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4223203