A method and system for preparing gasoline and diesel by mixing coal tar and biomass oil by hydrogenation

Abstract

The invention discloses a method and a system for preparing gasoline and diesel by mixing coal tar and biomass oil by hydrogenation, belonging to the technical field of petrochemical energy. In the present invention, the coal tar is first subjected to catalytic hydrogenation to obtain a hydrotreated coal tar system, then the hydrotreated coal tar system is mixed with biomass oil to obtain a mixed oil system, and the mixed oil system is continuously subjected to catalytic hydrogenation Then, through rectification treatment, gasoline and diesel products are obtained; wherein, the hydrogenated coal tar system is subjected to catalytic hydrogenation to form a hydrogen-donating solvent, and hydrogen radicals are used to hydrodeoxygenate the biomass oil. The system of the present invention is provided with several staged reactors to realize staged catalytic hydrogenation reaction, and the coal tar is subjected to hydrogenation pretreatment and mixed with biomass oil for catalytic hydrogenation. Compared with the single raw material hydrogenation technology, the invention has the advantages of fast hydrogenation speed, little influence of coking, and improved raw material adaptability.

Description

technical field [0001] The invention belongs to the technical field of petrochemical energy, and relates to a method and a system for preparing gasoline and diesel by mixing coal tar and biomass oil by hydrogenation. Background technique [0002] Coal occupies a considerable proportion in my country's energy consumption structure, but the traditional coal chemical production mode has been relatively extensive, resulting in problems such as excess capacity and declining profits. With the development of my country's economy and refined oil industry in recent years, my country's dependence on foreign crude oil has shown an upward trend year by year, which restricts the development of the national energy security strategy. The sustainable development of my country's economy is of great significance. At present, coal tar hydrogenation process technologies mainly include: pre-distillation fixed bed hydrogenation, delayed coking fixed bed hydrogenation, and suspended bed hydrocrack...

AI Technical Summary

Problems solved by technology

[0004] In actual production and use, due to the high viscosity and high content of mechanical impurities of coal tar, the source resources of coal tar raw materials that can be used for reaction hydroprocessing are insufficient; the sources of raw materials for hydrogenation of biomass oil are scattered and the quality is difficult to control , making the hydrogenation reaction high in hydrogen consumption and difficult. In addition, the biomass oil hydrogenation process has low adaptability to raw materials

Therefore, due to the above current situation, the separate hydrogenation of coal tar and biomass oil has the problems of insufficient raw material sources and difficult hydrogenation.

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