Truck tire pyrolysis optimization using the self-produced carbon black as a catalyst

Powder of scrap truck tire was pyrolysed and both quantitative and qualitative analyses of pyrolytic vapors were performed using a sampling system, GC and GC-MS-FID analyzes. The process optimization consists in optimizing the thermal cracking process of the pyrolytic vapors by reusing the produced carbon black (CB) as a catalyst. It is obtained that reusing 33 wt% of CB increases the gas yield from 10 to 17 wt% at the expense of the oil yield. As regard the gaseous phase, the catalyst significantly increases the yields of the H₂ and CO species, and reduces the yields of the CO₂, C₃H₆ and C₃H₈ species. It improves its LHV from 41.2 to 43.4 MJ.kg⁻¹. As regard the liquid phase, the catalyst results in the decreasing of C₅ species, so that almost half converts to gas. The C₁₀ species have also decreased in favor of C₆ and C₈ species, producing light gases.