液化天然ガスを主原料とした都市ガス中の硫化ジメチルを測定するための検知管の開発

概要

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The odorant blend of tertiary butylmercaptan (TBM) and dimethylsulfide (DMS) is generally used as an odorant in city gas based on liquefied natural gas. The concentrations of both TBM and DMS in city gas are about 2 volppm. To control the quality of city gas, a simple method is required to determine the odorant concentration at the end of gas pipelines. This paper reports on the development of a gas detector tube which can measure the DMS concentration in city gas. The principle of coloration is the oxidation of DMS by KMnO_4. The DMS concentration in city gas is determined by a newly developed gas detector tube conected to a TBM gas detector tube. The determination range at 293K was 0.8-8.2 volppm when the test gas volume was 100 ml. The repeatability of measurements was within ±10% as a relative standard deviation.
1997-11-05