About the article
L.V. ILYASOV, Dr. Sc.
The results of new thermochemical detector development for combustible gases determination are discussed. Detector is denoted as multi pellistor thermochemical detector (MPTD) and produced using thermochemical sensitive point tribrach sensing elements type 2 (PTSE-2). Detector contains assembly of four measuring pellistor elements and four sensitive comparationpellistor elements, positioned the way so that their holders to form flow chamber. Pellistors are placed on the flow chamber central axis. Experimentally it was fond that for complete combustion of methane, that considered to be the most stable gas for catalytic oxidation, four sensitive measuring and four sensitive comparison elements are needed. Mathematical model of detector signal is described and procedure of qualitative data obtaining using this model discussed. Possibility of MPTD application in gas chromatograph was shown experimentally in case of chromatograph operation using air or helium as carrier gas. Possibility of MPTD application in gas analyzing systems for determination of low volume combustion heat of hydrocarbon containing gases, and in self calibrate chromatographs was shown.
thermochemical detector, multi pellistor, chromatograph, combustible gases and vapors