Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1992-01-22
1994-03-22
Housel, James C.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 94, 436139, 436152, 73 3105, 73 3106, G01N 2700
Patent
active
052961966
ABSTRACT:
A semiconductor-type hydrocarbon sensor includes an oxide semiconductor, an outer electrode formed on an outside surface of the oxide semiconductor, an inner electrode formed on an inside surface of the oxide semiconductor, and a zeolite layer constructed of zeolite carrying at least one metal selected from the group consisting of platinum and copper. Small molecular weight hydrocarbons enter pores of the zeolite layer and are oxidized so that the small molecular weight hydrocarbons cannot reach the oxide semiconductor. Large molecular weight hydrocarbons cannot enter the small pores of the zeolite layer and, instead, pass through grain boundaries of zeolite particles of the zeolite layer to reach the oxide semiconductor. As a result, the large molecular weight hydrocarbons are selectively detected by the semiconductor-type hydrocarbon sensor.
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The Merck Index, 1983, p. 52.
Housel James C.
Toyota Jidosha & Kabushiki Kaisha
Wallenhorst Maureen M.
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