Gasoline and diesel-like fuel production via hydrocracking of hydrotreated tire pyrolytic oil over Ni-W/MCM-41 derived from blast furnace slag

Abstract

This work reports the conversion of tire pyrolytic oil (TPO) to fuels via hydrotreatment followed by hydrocracking (HC) processes over Ni–W/MCM-41 and Ni–W/Al-MCM-41 catalysts. The catalysts were hydrothermally synthesized using the blast furnace slag (BFS) derived silica followed by precipitation of metals oxide. The catalysts physiochemical properties were investigated via several analysis tools. The TEM results revealed the ordered mesoporous MCM-41 formation and the metal oxide particles distribution on its surface. The XPS and TPR analyses confirmed the metals oxide existence on the MCM-41 support surface while incorporation into the support was observed for Ni–W/Al-MCM-41 catalyst. The Ni–W/Al-MCM-41 catalyst possessed the higher HC activity and 97.7% hydrodesulfurization. The high activity was explained via the surface area, pore size and catalyst acidity. Both catalysts have successfully produced gasoline and diesel-like fractions corresponding to the EN228 and EN590 specifications. The hydrocracked oil produced a 35 wt% of gasoline and 33% diesel upon fractionation.