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Gas Chromatography—Mass Spectrometry for Characterization of Liquid Products from Pyrolysis of Municipal Waste and Spent Tyres

Pavlova A., Stratiev D., Mitkova M., Stanulov K., Dishovsky N., Georgiev K.

Acta Chromatographica

2015

Vol. 27, no. 4

637--655

Liquid products produced from two different types of waste pyrolysismunicipal wastes and spent tyre wastes are investigated using gas chromatography—mass spectrometry. This method has been applied for detailed identification of composition of the samples. The components were characterized in terms of their Kováts retention indices on a PONA capillary column. The obtained analytical data were successfully used for the characterization of the samples. More than three hundred compounds were detected. The liquid products were complex mixtures, composed mainly of C4—C12 compounds. The examination of the selected m/z values very clearly indicates the existence of the different groups of compounds. With a lot of olefins content (31.9%), followed by aromatics (20.0%), paraffins (17.3%), and naphthenes (7.5%), it is described as the liquid product from pyrolysis of municipal solid wastes. The aromatic compounds in liquid product from pyrolysis of spent tyre wastes have the highest concentration (33.5%), and they are followed by naphthenes (28.6%), olefins (19.2%), and paraffins compounds (7.0%). The present study has shown that the pyrolysis of municipal waste and spent tyres can be used as a means for reduction of environmental pollution and production of liquid product which could be used as a fuel source.

Investigation of pyrolysis behavior of fenoxycarb using PY-GC-MS assisted with chemometric methods

Wang G., Hou Z., Sun Y., Liu Y., Xie B., Liu S.

Chemia Analityczna

2007

Vol. 52, No. 1

141-156

Fenoxycarb is a carbamate-type insect growth regulator. To investigate its pyrolysis behavior, it was pyrolysed at 600°C, 750°C and 9QQ°C. Pyrolysate was directly subjected to GC-MS analysis. The separated components were identified using probability-based matching procedure followed by correlation of the boiling point- Lee retention index. It has been shown that (Py-GC-MS) pyrolysis assisted with chemometric methods is an effective technique for the investigation of carbamate pesticide pyrolysis, 84 components were determined in pyrolysate, which included the products of thermal decomposition of fenoxycarb, a variety of monoaromatics, polycyclic aromatic hydrocarbons, and other oxygenous or nitrogenous compounds. Determination of the components of pyrolysates may provide useful information for understanding of the pyrolysis mechanism of fenoxycarb and other carbamate pesticides.