The influence of polymer matrix and its role in the detection of volatile organic compounds using Py-GC-MS and TG-DSC as solid state analysis techniques

Description

The purpose of the study was to analyse and describe the synergy occurring between the biomass matrix and the polymer matrix during the thermal conversion of solid biofuel samples. The object of the study was wood biomass and a model sample containing PP, PE, LDPE, ABS, PET (transparent and coloured), PMMA, PA6, PS, PVC, PC, and POM, among others. The scope of the research conducted was Py-GC-MS analytical pyrolysis and TG-DSC analysis. Sample descriptions include: No# - sample number where: 41- polymer mixture 42- 0.1% of sample 41 in sample 49 43 - 0.5% of sample 41 in sample 49 44 - 1% of sample 41 in sample 49 45 - 2.5% of sample 41 in sample 49 46 - 5% of sample 41 in sample 49 47 - 7.5% of sample 41 in sample 49 48 - 10% of sample 41 in sample 49 49 - biomass 600 - temperature of conducting pyrolysis 50 - split File: .txt - TG-DSC .qgd - Py-GC-MS

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The analytical pyrolysis was performed using a CDS 5200 (CDS Analytical LLC, Oxford, USA). The pyrolysis temperatures were set at 600 °C, while the GC oven temperature was raised by 5 °C each minute from 45° to 275°C. The sample vapors created in the furnace were separated in two, with one half being fed to the column at 1.91 ml/min and 27.3 kPa, whilst the remainder was evacuated. This was carried out on a PerkinElmer Clarus GC/MS (USA) instrument with a temperature-programmed capillary column and MS at 70 eV. A Phenomenex's Zebron ZB-5 capillary column was used, which had a 5% diphenyl and a 95% dimethylpolysiloxane stationary phase, column length of 30 m, column ID of 0.32 mm, and a thickness of 0.10 m. The MS was adjusted to the following parameters: 250 °C ion source heater, 300 °C interface heater, 10−5 Pa vacuum, 45–300 m/z range, and 1428 scan speed. Post run PerkinElmer (NIST17.0) software was used to analyze the chromatograms and spectra obtained from the analysis.

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