$NiMo/{WO}_4^{2-}/{ZrO}_2$,-Zeolite-Containing Hydrodearomatization Catalyst for Improving the Operating and Environmental Characteristics of Diesel Fuel

A zeolite-containing diesel-fuel dearomatization catalyst was prepared using synthesized tungsten-doped zirconia ${WO}_4^{2-}$/ZrO₂ and an Ni—Mo complex. The catalyst was tested for diesel fuel dearomatization at 4.5 MPa, feedstock input volume flow rate 1.5 h^-1, H₂/feedstock volume ratio 1000 nm³/m³, and temperature range 270-330°C. The highest conversion (78.8%) of polycyclic aromatic hydrocarbons and greatest cetane number were attained at 290°C. Also, the cloud and pour points of the diesel fuel decreased by 23-25°C because of cracking at 310-330°C and extensive isomerization at 290°C. This was confirmed by the yields of target diesel fraction of 69.8-72.9 and 89.2 wt. %, respectively.