Simultaneous Adsorptive Desulphurization and Denitrogenation in Crude Tire Pyrolysis Oil Refining

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Abstract
Pyrolytic oil usually contains high nitrogen and sulphur content which reduces its efficiency in addition to posing crucial environmental and health concerns. Hence the need for desulphurization and denitrogenation of pyrolytic oil obtained from waste tire for efficient application. Freshly prepared Ni-Cr adsorbent impregnated with TiO2-SiO2 catalyst was used as the adsorbent in the treatment of the pyrolytic oil through adsorption process. Effect of operating time and catalyst ratio were investigated. The result showed that both operating time and catalyst ratio influenced the percentage removal of sulphur and nitrogen. TiO2:SiO2 catalyst ratio of 2:3 gave 78.38%sulphur removal while ratio of 5:0 gave 89.80% nitrogen removal. The effect of time indicated that 78.84% and 93.98% removal of sulpur and nitrogen were obtained respectively after 120 minutes. For optimal simultaneous removal of both sulphur and nitrogen, a mixing ratio of 1:4 was obtained. The study showed that Ni-Cr/TiO2-SiO2 can be an effective adsorbent in desulphurization and denitrogenation of crude tire pyrolytic oil.

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