Direct coal liquefaction oil hydrogenation stabilization method

• Main Authors: ZHOU LI, ZENG WENGUANG, SHE XICHUN, LI HUA, ZENG ZHIYU, LI QINGHUA
• Format: Patent
• Language: English
• Published: 23.09.2015
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The present invention provides a direct coal liquefaction oil hydrogenation stabilization method which is as follows: hydrogen is fed by pores with a nano-sized average pore size into the direct coal liquefaction oil to obtain hydrogen-containing liquefied oil; and the hydrogen-containing liquefied oil is fed into a tubular fixed bed reactor in the upward-flow manner for contacting with a hydrogenation catalyst under liquid-phase hydrogenation conditions. Better hydrotreating results can be obtained, the direct coal liquefaction oil sulfur and nitrogen content and residual carbon content can be effectively reduced, polycyclic aromatic hydrocarbons in the direct coal liquefaction oil are partially hydrogenated, and gelatin and asphaltene content in the direct coal liquefaction oil can be reduced. The method needs no hydrogen cycle, the size of a hydrogenation reactor is reduced, the pressure rating of the gas-liquid separation unit is reduced, and investment costs and operating energy consumption are reduced. In addition, a hydrogenation raw material can carry a sufficient amount of hydrogen without introduction of diluent oil and / or circulating oil into the hydrogenation raw material, and the effective capacity of the hydrogenation reactor can be improved.