Hydrocracking catalyst for preparing fuel oil from coal tar and preparation and application methods thereof

Abstract

The invention provides a novel hydrocracking catalyst special for coal tar and a preparation method and an application method thereof aiming at the problems of the conventional coal tar hydrocracking catalyst. The hydrocracking catalyst consists of active ingredients, an aid and a carrier, wherein the active ingredients of the hydrocracking catalyst consist of WO3 and NiO, the aid is ReO, and the carrier consists of activated alumina, zeolite and BaO; and the active ingredients and the aid respectively account for 14 to 34 percent and 0.4 to 1.2 percent of the total mass of the catalyst based on an oxide form. The method for preparing the catalyst comprises the following steps of: preparing the carrier, pretreating the carrier, impregnating, performing catalyst post-treatment and the like; and the catalyst preparation conditions are strictly controlled by introducing novel ultrasonic impregnation technology. Compared with the prior art, the catalyst is excellent in surface physicochemical properties, has good aromatic hydrocarbon saturated activity and proper cracking activity, and excellent high-temperature resistance and compression resistance, and effectively improves the quality and yield of hydrotreated product oil.

Description

technical field [0001] The invention belongs to the technical field of producing fuel oil by hydrogenation of coal tar, and in particular relates to a hydrocracking catalyst for producing fuel oil from coal tar and a preparation and application method thereof. Background technique [0002] "Lack of oil, less gas, and rich coal" is the current energy situation in my country, and the problem of energy supply has evolved into a prominent problem facing my country's economic development and national security. In the case of limited petroleum resources, it is of great practical and strategic significance to develop coal chemical industry and develop deep processing technology and products. Coal tar is a by-product of coal coking, carbonization and gasification processes, and its domestic production exceeds 10 million tons. Domestic coal tar is processed and utilized to extract chemicals such as naphthol, or simply treated and burned as inferior fuel oil, resulting in a large amo...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to propose a new special hydrocracking catalyst for coal tar and its preparation and application method in view of the problems existing in the existing coal tar hydrogenation catalyst, and achieve high activity by strictly controlling the catalyst preparation process conditions The purpose of high stability coal tar hydrocracking catalyst

The catalyst of the present invention overcomes the general hydrocracking activity and hydrothermal stability and weak high temperature resistance when the existing petrochemical commercial hydrocracking catalyst is used to process coal tar or process the secondary coal tar raw material after hydrofining. Easy to deactivate and other shortcomings, it has a high specific surface area suitable for processing coal tar components, combined pore size, high pore volume and suitable active centers, uniform distribution of active components, at the same time, it has good mechanical properties Strength, hydrothermal properties and coal tar hydrocracking activity, combined with upstream hydrofinishing catalysts can effectively convert coal tar or coal tar fractions into high-quality fuel oil

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