HEAVY OIL HYDROPROCESSING WITH THE ADDITION OF HYDROGEN-DONATING HYDROCARBONS DERIVED FROM PETROLEUM

The effects of the addition of hydrogen-donating hydrocarbons derived from petroleum were tested in a pilot plant (0.01 bbl/day) equipped wi th a downflow fixed bed reactor for the hydroprocessing of atmospheric residues, and the following results were obtained: (1) HHAP (partly h ydrogenated product of a highly aromatic heavy fraction from petroleum ) and HAP (highly aromatic heavy fraction prior to the hydrogenation t o produce HHAP) were effective to reduce coke formation and hydrogen c onsumption. (2) A particular and effective mechanism resulting from th e configurations of the additives was found to be initiated by the add ition of these additives. (3) This mechanism was substantiated by deta iled analyses of the products.