Hydrogenation of distillate products from liquefaction of coal from Mamyt deposit

Abstract

Coal distillates with boiling point below 360 ºС produced by liquid-phase coal hydrogenation contain substantial amounts of sulfurous (S = 0.4–0.8 %), nitrous (N = 0.2–0.5 %), oxygenous (О = 1.5–2 %) and unsaturated compounds (20–25 %). To obtain low-sulfur stable motor fuel with high octane and cetane numbers it is required to process such products applying hydrotreatment processes. The published work contains the results of hydrogenation of coal distillates of Mamyt coal with the boiling point below 360 ºС in the presence of Mo-containing catalysts deposited on the surface of skeletal nickel (Ni-Raney) are presented. It is shown that 3–5 % Mo/Ni-Re catalysts activate the hydrogenation reactions of hetero-atomic and unsaturated compounds at 420 ºC, 6.0 MPa. The content of nitrous bases in hydrogenate in comparison with the primary material reduces from 3.3 to 0.5 %; sulfur content reduces from 0.74 to 0.05 %; nitrogen from 0.47 to 0.01 %. The best hydrotreatment of coal distillate is performed with 5 % Мо/Ni-Rе catalyst. In hydrotreated petroleum fractions the amount of paraffinic and olefinic hydrocarbons reduced almost twice and the amount of isoparaffinic hydrocarbons increased more than two times. The diagram for the conversion of the organic matter of paste is proposed. The principal diagram for obtaining components of motor fuels by hydrotreatment of distillate products of liquefaction of Mamyt coal is developed.