| Summary: | In this present work, Hydro-dearomatisation of toluene and hydro-isomerisation of n-hexadecane (n-C<sub>16</sub>) in ultralow sulphur diesel (ULSD) using Pt-Cl/H-Beta and Pt/<i>H</i>-Beta catalyst was investigated in a continuous down-flow trickle-bed reactor (DFTBR), and the physicochemical properties of products were studied. The catalytic effect on 40:60 wt% of <i>H</i>-beta-zeolite (<i>H</i>-β) and binder−aluminahydrochlorite extruded was characterized in scanning electron microscopy, nitrogen adsorption and coke testing. The study showed that 80 to 95 wt% of middle distillates recovered in ULSD on elevated temperature between 230 and 270 °C at 5 MPa. With a higher residence time of feed, the middle distillate recovered with 2.2 <i>v</i>/<i>v</i>% of aromatics and −32 °C of cloud point. In the model compound investigation of toluene and n-C<sub>16</sub>, it was observed that absorption of aromatic ring inhibits the rate of isomerisation; particularly it reduces the yield of branching and rearrangement of n-C<sub>16</sub>. Also, Cl-incorporated <i>H</i>-β extrudate enhanced the ring saturation and suppressed the reaction path in oligomerisation and cyclisation of paraffin. This methodology achieved asingle-stage upgrading technique involved in the delivery of commercial diesel in the market with low cloud point and aromatic content.
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