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    • 2. 发明授权
    • Metal oxide semiconductor catalyst hydrocarbon sensor
    • 金属氧化物半导体催化剂烃传感器
    • US6109095A
    • 2000-08-29
    • US985123
    • 1997-12-04
    • William P. Addiego
    • William P. Addiego
    • G01N31/00G01N27/12G01N33/00G01N7/00
    • G01N27/12G01N33/0047F01N2550/02
    • 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.
    • 用于选择性地检测HC级别的传感器,例如烷烃,烯烃和芳族化合物,其包含对于选择性HC级别具有催化活性的金属氧化物半导体催化剂; 反应选自部分氧化,氧化脱氢,氧化偶联和异构化。 这些反应中的每一个导致金属氧化物的电导率的变化,其与气体混合物中的HC的浓度成比例。 合适的金属氧化物催化剂包括Bi2O3-MoO3,CoO-MoO3,SnO2-MoO3,TeO2-MoO3,Sb2O5-V2O5-MoO3,SnO2-Sb2O5,Nb2O-V2O5-MoO3,V2O5-MoO3,ZnO-Fe2O3,Li2O-MgO,V2O5 -P 2 O 5,尖晶石或钙钛矿晶体结构的金属氧化物化合物及其混合物。 由传感器执行的方法包括以下步骤:(1)使气体混合物与能够引发选择的烃类化学吸附和/或至少一种催化反应的金属氧化物半导体催化剂接触; 然后测量所得金属氧化物的电导率的变化,然后将该变化转化为气体混合物中的总非甲烷烃的总浓度。