Wang TF, Hu YH, Li SF, Han DL (2009) Effects of 2H-heptafluoropropane on the liquid and tar products of poly(methylmethacrylate) flash pyrolysis. Journal of Analytical and Applied Pyrolysis 84(1), 39-46. [In English]

Web link: http://dx.doi.org/10.1016/j.jaap.2008.10.006

Keywords:

2H-Heptafluoropropane; Poly(methylmethacrylate); Flash pyrolysis; Liquid; and tar products; GC/MS; polycyclic aromatic-hydrocarbons; poly(methyl methacrylate); thermal-degradation; 2-h heptafluoropropane; gas chromatography; exhaust; emissions; air flames; polystyrene; decomposition; spectroscopy

Abstract: The flash pyrolysis of poly(methylmethacrylate) (PMMA) granules in nitrogen and 2H-Heptafluoropropane (HFP) atmosphere were carried out ill a tube-type pyrolyzer at 700 degrees C, respectively. The liquid and tar products were transported by the continuous flowing environmental gases, and collected by Cambridge pad. The products were detected and identified by gas chromatography combined with mass spectrometry (GC/MS). The results indicate that the liquid and tar products mainly consist of some aromatic hydrocarbons and polycyclic aromatic hydrocarbons (PAHs), and the distributions of pyrolysis products in HFP atmosphere are rather different from that in nitrogen atmosphere. The presence of HFP results in an obvious concentration decrease of most oxygenated aromatic compounds, as well as all increase of almost all the aromatic hydrocarbons. The mechanisms of the changes are discussed from the aspect of reaction pathways. (C) 2008 Elsevier B.V. All rights reserved.