Study of Extraction of Liquid Pyrolysis Products in Hexane-Acetonitrile System with the Use Gas Chromatography-Mass Spectrometry Method

Tatsiana Henarava, Physical-Chemical Hydrodynamics Lab, A.V. Luikov Heat and Mass Transfer Institute of The National Academy of Sciences of Belarus (tatiana-susliako@mail.ru)
Oleg Penyazkov, Department Of Physics And Chemistry Of Non-equilibrium Media, A.V. Luikov Heat and Mass Transfer Institute of The National Academy of Sciences of Belarus
Tatsiana Chernova, Department Of Molecular Biotechnologies, Institute Of Bioorganic Chemistry Of The National Academy Of Sciences Of Belarus, Minsk, Belarus
Vasili Sauchyn, Arc Plasma Department, A.V. Luikov Heat and Mass Transfer Institute of The National Academy of Sciences of Belarus

Pyrolysis of waste tyre is sufficiently promising method of its processing into valuable chemicals. The gas chromatography-mass spectrometry was used for analyses of liquid pyrolytic tyre products (further, pyrolytic oil). We studied the extraction distribution and calculated the distribution constant of pyrolytic oil in system «hexane-acetonitrile» to analyze the chemical properties of samples. We studied extraction distribution of pyrolytic oil with the view to concentrate valuable chemicals of liquid pyrolytic products of waste tyre.

The pyrolytic oil was obtained by using pyrolysis process of tyre particles at reaction temperature of 500 °C. The yield of products obtained from the pyrolysis process was following: liquid product 49 %, carbon black 43 % and gas 8 %.

Gas chromatography-mass spectrometry (GC-MS) analysis was performed with a 7890A GC System equipped with a DB-5MS 30 length m × 0.25 mm id × 0.25 μm film thickness, capillary column and 5975C Inert XL EI/CI mass selective detector (Agilent Technologies, Inc., USA). The injection port was held at 250 °C and the injection volume 0.1 µL of sample. The mass-selective detector was operated in the electron impact ionization mode (70 eV).

The composition of pyrolytic oil and concentrating of valuable chemicals by extraction method in the system «hexane-acetonitrile» was studied. And the distribution constants of chemical compounds for additional identification of the chemical composition of pyrolytic oil were calculated.

GC-MS analysis and calculated distribution constants showed that the liquid pyrolytic products are formed from mixture of low and high molecular weight organic polar and nonpolar compounds. It was found that the main valuable component of pyrolytic oil is limonene. It has been established that limonene can be concentrating by extraction separation using system «hexane-acetonitrile».


Study of Extraction of Liquid Pyrolysis Products in Hexane-Acetonitrile System with the Use Gas Chromatography-Mass Spectrometry Method Tatsiana Henarava, Physical-Chemical Hydrodynamics Lab, A.V. Luikov Heat and Mass Transfer Institute of The National Academy of Sciences of Belarus (tatiana-susliako@mail.ru) Oleg Penyazkov, Department Of Physics And Chemistry Of Non-equilibrium Media, A.V. Luikov Heat and Mass Transfer Institute of The National Academy of Sciences of Belarus Tatsiana Chernova, Department Of Molecular Biotechnologies, Institute Of Bioorganic Chemistry Of The National Academy Of Sciences Of Belarus, Minsk, Belarus Vasili Sauchyn, Arc Plasma Department, A.V. Luikov Heat and Mass Transfer Institute of The National Academy of Sciences of Belarus Pyrolysis of waste tyre is sufficiently promising method of its processing into valuable chemicals. The gas chromatography-mass spectrometry was used for analyses of liquid pyrolytic tyre products (further, pyrolytic oil). We studied the extraction distribution and calculated the distribution constant of pyrolytic oil in system «hexane-acetonitrile» to analyze the chemical properties of samples. We studied extraction distribution of pyrolytic oil with the view to concentrate valuable chemicals of liquid pyrolytic products of waste tyre. The pyrolytic oil was obtained by using pyrolysis process of tyre particles at reaction temperature of 500 °C. The yield of products obtained from the pyrolysis process was following: liquid product 49 %, carbon black 43 % and gas 8 %. Gas chromatography-mass spectrometry (GC-MS) analysis was performed with a 7890A GC System equipped with a DB-5MS 30 length m × 0.25 mm id × 0.25 μm film thickness, capillary column and 5975C Inert XL EI/CI mass selective detector (Agilent Technologies, Inc., USA). The injection port was held at 250 °C and the injection volume 0.1 µL of sample. The mass-selective detector was operated in the electron impact ionization mode (70 eV). The composition of pyrolytic oil and concentrating of valuable chemicals by extraction method in the system «hexane-acetonitrile» was studied. And the distribution constants of chemical compounds for additional identification of the chemical composition of pyrolytic oil were calculated. GC-MS analysis and calculated distribution constants showed that the liquid pyrolytic products are formed from mixture of low and high molecular weight organic polar and nonpolar compounds. It was found that the main valuable component of pyrolytic oil is limonene. It has been established that limonene can be concentrating by extraction separation using system «hexane-acetonitrile».

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