Environmental regulations are some of the serious driving forces for hydrocarbon processing industry (HPI) refining advances. Reformulated gasoline specifications call for less aromatics and olefins, and impose tight constraints on light hydrocarbons and sulfur (S). New diesel legislation requires deep desulfurization down to 10 – 50 parts per million S.
These trends are increasing the hydrogen (H2)-to-carbon (C) atomic ratio for refinery products. At the same time, available oil resources, on average, become heavier with higher S content and metals. This has intensified hydrotreating demands for hydrodesulfurization (HDS), hydrode-nitrification (HDN), HDM and hydrocracking.
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