Study of pressure impact on atmospheric residue hdyrocracking in the presence of oil shales

Abstract

The paper presents the results of hydrocracking process of atmospheric residue in the presence of oil shales as an alternative crude, studies the pressure influence on hydrocracking process as well. It is reveled that the organic and mineral parts of oil shales activate thermal conversions of petroleum products. The pressure impact on the process was studied in the interval of 1−4 MPa in the temperature of 450 оС. It was defined that with the pressure boost from 1.0 up to 2 MPa (in 450 оС) the yield of light petroleum products increases from 68 to 70 % mass, with the further pressure rise from 2 to 4 MPa the yield of light petroleum products increases up to 72 % mass, and the coke amount decreases from 3.5 to 2 %. In the result of pressure boost from 1 to 4 MPa (in 450 оС) the yield of gasoline fraction increases from 28.8 up to 29.2 % mass, and the diesel from 39.2 up to 42.2 %. The gasoline fraction obtained due to the atmospheric residue hydrocracking in the pre-sence of oil shales is stable and characterized with the insignificant amount of aromatic and unsaturated hydrocarbons in the composition. Octane number is equal to 70-80 p. After hydrotreatment the gasoline and diesel fractions may be used as fuels. The composition of obtained gas allows applying it as a fuel in the oil refineries.