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1. 发明专利

JP2000146913A METHOD AND DEVICE FOR MEASURING HYDROCARBON WITHOUT CONTAINING METHANE 失效
公开(公告)号：JP2000146913A
公开(公告)日：2000-05-26
申请号：JP29615899
申请日：1999-10-19
申请人： HARTMANN & BRAUN AG
发明人： KRONEISEN ARMIN
IPC分类号： G01N27/62 , G01N31/00 , G01N31/10 , G01N31/12 , G01N33/00
摘要： PROBLEM TO BE SOLVED: To optimize oxidation even if the composition of a gas to be measured fluctuates by subtracting methane content from the total hydrocarbon content of the gas to be measured by supplying an excessive amount of oxygen before a catalyst. SOLUTION: In a method, oxygen or air is supplied to a gas to be measured in a passage where the gas to be measured advances to an oxidation catalyst 1. More specifically, air is supplied to a combustion-air-conditioning system 7 and the combustion air is directly supplied to a flame ion detector(FID) 5 via a filter 4 and, on the one hand, via a nozzle 2. On the other hand, the combustion air is supplied to the oxidation catalyst 1 from a side path via the nozzle 2 that is in parallel with the supply of the gas to be measured. In this case, by supplying an excessive amount of combustion air, namely oxygen, before the catalyst, hydrocarbon in the gas to be measured is oxidized in the oxidation catalyst 1 to become carbon dioxide and water. Remaining methane is measured by the FID 5 via the filter 4 and the methane content is subtracted from the total hydrocarbon content of the gas to be measured, thus measuring hydrocarbon that does not contain methane without blocking the oxidation catalyst 1.

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