Method for hydrogenation of medium-low temperature coal tar to produce large-specific weight aviation kerosene

Abstract

The invention discloses a method for hydrogenation of medium-low temperature coal tar to produce large-specific weight aviation kerosene. The method includes: fractionating the medium-low temperature coal tar to obtain light fraction and heavy fraction, mixing the light fraction with hydrogen and leading the mixture into a hydrotreating reaction area to contact a hydrogenation protective catalyst and a hydrofining catalyst in order to undergo hydrogenation reaction; separating the hydrofining effluent, making the obtained liquid phase product enter a fractionating tower; bringing the 140-290DEG C kerosene fraction obtained by fractionation into a hydro-upgrading reaction area where a hydro-upgrading catalyst containing amorphous aluminium silicon and modified Y zeolite is adopted, and performing hydro-upgrading reaction in the presence of hydrogen; subjecting the hydro-upgrading effluent into a hydrofinishing reaction area to undergo hydrofinishing reaction, and separating the hydrofinishing product to obtain the large-specific weight aviation kerosene. The method provided by the invention adopts the medium-low temperature coal tar as the raw material to maximumly produce the large-specific weight aviation kerosene with the advantages of high density, volume, high volume calorific value, low aromatic hydrocarbon content, and good low temperature performance.

Description

technical field [0001] The invention relates to a production method of aviation kerosene with a large specific gravity, specifically a method of hydrogenation in two stages of hydrogenation-hydrogenation upgrading / hydrogenation supplementary refining using medium and low-temperature coal tar pretreated by raw materials A method for producing high specific gravity aviation kerosene. Background technique [0002] With the rapid development of aviation science, the flight speed of the aircraft has increased from the subsonic speed in the 1950s to the current Mach number M of 2-3, which puts forward higher and higher requirements for the thermal stability of the fuel. The requirement for voyage is to be able to load fuel with higher energy density under the same fuel tank volume conditions. These two requirements have led to the desire for aviation kerosene with a high specific gravity. Because high specific gravity kerosene has high volumetric energy characteristics, compared ...

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Problems solved by technology

The process is relatively simple. Even if the kerosene fraction is cut, since there is no hydrogenation upgrading and hydrogenation supplementary refining process, although the density and volume calorific value are large enough, the content of aromatics is too large, and the content of sulfur and nitrogen is relatively high. Corrosion and carbon deposition indicators are unqualified

[0008] To sum up, using traditional naphthenic distillate oil to directly cut high specific gravity aviation fuel suitable for distillate hydrofining production, the density is closely related to the raw material, generally the density is not high, and the range gain of the aircraft is limited. At the same time, the suitable naphthenic raw material The shortage of resources further restricts the production of aviation kerosene with a large proportion

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