Metal oxide semiconductor catalyst hydrocarbon sensor

Details Metal oxide semiconductor catalyst hydrocarbon sensor Metal oxide semiconductor catalyst hydrocarbon sensor

1997-12-04

2000-08-29

Larkin, Daniel S.

Measuring and testing

Gas analysis

Detector detail

73 2331, 422 88, 422 90, 422 98, G01N 700

Patent

active

061090956

ABSTRACT:
A sensor for selectively detecting HC classes, e.g., alkanes, alkenes and aromatics, in a gas mixture comprising a metal oxide seiniconductor catalyst which is catalytically active for the selective HC classes; the reactions selected from the group consisting of partial oxidation, oxidative dehydrogenation, oxidative coupling and isomerization. Each of these reactions results in imparting a change in the electrical conductivity of the metal oxide which is proportional to the concentration of the HC in the gas mixture. Suitable metal oxide catalysts include Bi.sub.2 O.sub.3 --MoO.sub.3, CoO--MoO.sub.3, SnO.sub.2 --MoO.sub.3, TeO.sub.2 --MoO.sub.3, Sb.sub.2 O.sub.5 --V.sub.2 O.sub.5 --MoO.sub.3, SnO.sub.2 --Sb.sub.2 O.sub.5, Nb.sub.2 O--V.sub.2 O.sub.5 --MoO.sub.3, V.sub.2 O.sub.5 --MoO.sub.3, ZnO--Fe.sub.2 O.sub.3, Li.sub.2 O--MgO, V.sub.2 O.sub.5 --P.sub.2 O.sub.5, metal oxide compounds of a spinel or perovskite crystalline structure, and mixtures thereof. A method carried out by the sensor comprises the following steps: (1) contacting the gas mixture with a metal oxide semiconductor catalyst capable of initiating chemisorption and/or at least one catalytic reaction of a selected hydrocarbon class; and, thereafter measuring the resultant change in the electrical conductivity of the metal oxide and thereafter converting the change to the concentration of the total non-methane hydrocarbons in the gas mixture.

REFERENCES:
patent: 3961987 (1976-06-01), Mund et al.
patent: 4033169 (1977-07-01), Fujishiro et al.
patent: 4194994 (1980-03-01), Baresel et al.
patent: 4535315 (1985-08-01), Sakai
patent: 4542640 (1985-09-01), Clifford
patent: 4592967 (1986-06-01), Komatsu et al.
patent: 4792433 (1988-12-01), Katsura et al.
patent: 4892834 (1990-01-01), Rauh
patent: 5173166 (1992-12-01), Tomantschger et al.
patent: 5217692 (1993-06-01), Rump et al.
patent: 5302274 (1994-04-01), Tomantschger et al.
patent: 5338515 (1994-08-01), Dalla Betta et al.
patent: 5351029 (1994-09-01), Huth et al.
patent: 5389340 (1995-02-01), Satake
patent: 5427740 (1995-06-01), Coles et al.
patent: 5466605 (1995-11-01), Glaunsinger et al.

Affiliated with

Also associated with

Rating

Metal oxide semiconductor catalyst hydrocarbon sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Metal oxide semiconductor catalyst hydrocarbon sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal oxide semiconductor catalyst hydrocarbon sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1237045