Studying on Hydrotreating of Coker Distillates

ABSTRACT
The primary method to remove sulfur , improve cetane index
and reduce aromatic content of gas oil / diesel is hydroprocessing.
Therefore, the significant advancements in hydrotreating of light
coker gas oil (LCGO) derived from delayed coker unit at Suez Oil
Processing Company have been performed in a cata-test fixed bed
micro-reactor unit, using a commercial CoMo/Al2O3 Catalyst after
sulfidation. The operating conditions were varied in order to study
the impact of these processes conditions (temperature;275-400°C,
hydrogen pressure;30-85 bar, and hourly space velocity; 0.5-1.5h-1 )
on the yield , and quality of gas oil within hydrotreating regime,
which is the important to aid the optimization of the process from
the environmental regulations and national market demands point of
view. The present investigation is conducted on the LCGO, which
was selected as a hydrotreated feedstock due to its higher
unsaturated hydrocarbon contents ( aromatics and olefins) and
heteroatom (sulfur and nitrogen), in order to produce an upgraded
gas oil acceptable as transportatin fuel according to the
environmental and national regulations, and / or the world wide fuel
charter December 2002.