A thermal desorption method for analysis of the volatile components on carbon particles,which were produced by the combustion of diesel oil,has been developed.The collection equipment of carbon particles was designed and the pyrolysis instrument was used as the thermal desorption equipment.The collected carbon particles were injected into the pyrolysis instrument and desorbed at the temperature of 700 ℃.All the volatile components were analyzed by gas chromatography-mass spectrometry(GC-MS).The results showed that the volatile component on carbon particle could be rapidly analyzed.The method provided a guidance to the further research of the burning behaviors of the diesel oil.
Poly α-olefin,used as the drag reducing agent on the crude oil transportation,was analyzed by pyrolysis/gas chromatography-mass spectrometry(PY/GC-MS).Three polyolefin samples of polydecene,polyoctene and the copolymer of decene and octane,were analyzed.The samples were analyzed by increasing pyrolysis temperatures from 500 to 800 ℃.The result showed that the optimal pyrolysis temperature was 600 ℃.2-Methyl-decene and 2-methyl-pentadecene was selected as the characteristic pyrolysates for identification polydecene and polyoctene,respectively.The quantitative method of the copolymer was also discussed.Height peak of the characteristic pyrolysate was used to calculate the mass rate of the two monomers in the copolymers.The error of the method was-4.08%.
