Co-pyrolysis and hyrdogenation of waste tires and thar coal blends

This study was carried out to investigate the direct co-pyrolysis of blends comprising lignite coal and waste tires. The effects of various parameters that include coal to waste tires ratio, temperature, pressure, hydrogen donor concentration, and retention time were investigated. From the results, an optimum oil yield obtained with 50: 50 coals to waste tires ratio was found to be 36% with maximum gross calorific values of 5501 Kcal/kg. Fourier transform infrared resonance spectra (FTIR) suggested the presence of aromatic and aliphatic linkages along with hydroxyl group and carbonyl functional groups. According to nuclear magnetic resonance analysis (NMR), the aromatic and aliphatic fractions were found to be 65% and 35%, respectively, with 50: 50, coal to waste tires blend. The presence of carbon fractions from C16 to C36 was found in liquid oil through gas chromatograph mass spectroscopic analysis (GC-MS). The results of study could be applied to the commercial production of pyrolysis oil through pyrolysis of waste tires and coal largely available in Pakistan.