Potential use of modified catalysts for production of valuable tire derived product

Abstract

Tire derived oil is one of the alternative fuels which can be used to substitute petroleum oil that is continuously running out of the world. In this work, waste tire pyrolysis was chosen to be the way to produce pyrolytic oil. Due to the limit of sulfur in petroleum products and the high price of a noble metal, in this research. NiMo, NiW, CoMo and CoW are chosen as non-noble metals to be used in the pyrolysis of waste tire. The effects of non-noble metals (Ni and Co) modified with Mo and W as second metals and supported on HBETA zeolite for tire pyrolysis were investigated in this work on the quality and compositions of the pyrolytic oil products. The amount of Ni or Co was fixed at 5 %wt with the second metal (Mo or W) varied at 10 %wt and 20%wt. The obtained products were analyzed via gas chromatograph. GC-TOF, column chromatography, and SIMDIST GC, whereas the catalysts were characterized using temperature programmed reduction and X-ray diffraction. The results indicated that the catalyst with 5 wt% of Ni with 20 wt% of Mo on HBETA showed the good activity for pyrolysis process because it gave a high saturated hydrocarbon contents (48.6 wt%) with a low sulfur content (0.82 wt%) in oil. 5 wt%o of Co with 20 wt% of W on HBTEA had the highest hydrodesulfurization ability among the other bimetallic catalysts because it can decrease the Sulphur content in the tire-derived oil from I.36 (non-catalytic case) to 0.51.