The production of high quality fuels, the increasing demand of middle distillates as compared to gasoline and the processing of heavier crudes have been the critical drivers of the oil refining industry in the last decade. The processing of heavier and naphthenic oils and syncrudes is receiving more attention in a scenario of increasing oil prices. These oils contain higher amount of contaminants such as nitrogen and metals, higher aromatic and naphthenic contents, higher yields of residue and sometimes higher acidity. Hydrotreating and hydrocracking are key processes in oil refining due to their flexibility in contaminants removal, molecular rearrangement and feedstock upgrading .This contribution will analyze some challenges in the hydroprocessing of naphthenic and high nitrogen feedstocks for producing ULSD. The impact of high nitrogen and aromatic contents in one or two stages hydrotreating and mild hydrocracking processes for maximizing sulfur removal and cetane number improvement will be considered.

Production of ULSD from naphthenic and high nitrogen feedstocks

244th National Meeting (2012)

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