Chlorine-containing pyrolysis oil radial moving bed reaction adsorption dechlorination hydro-conversion method

By employing a radial moving bed reactive adsorption dechlorination method and a core-shell structure catalyst, the problems of rapid catalyst deactivation and insufficient unit flexibility were solved, enabling efficient, stable, and economical hydrogenation conversion of chlorinated pyrolysis oil, and improving the operational safety and product quality of the unit.

CN121930876APending Publication Date: 2026-04-28CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Application Number
CN202610211954.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-13
Publication Date
2026-04-28

AI Technical Summary

Technical Problem

Existing technologies struggle to effectively control the poisoning of hydrogenation catalysts by chlorine, leading to rapid catalyst deactivation. Furthermore, traditional fixed-bed reactors lack flexibility, making it difficult to cope with feedstock fluctuations and chlorine accumulation, thus affecting the stability and economic efficiency of the plant.

Method used

The radial moving bed reactive adsorption dechlorination method employs a core-shell structured reactive adsorption dechlorination catalyst. By coupling the core hydrogenation dechlorination active layer with the outer shell adsorption layer, the hydrogenation dechlorination reaction of chlorinated organic compounds and the near-source capture and fixation of HCl are achieved. Furthermore, the online addition and removal of the catalyst avoids the problem of short operating cycles caused by catalyst adsorption saturation or deactivation.

Benefits of technology

Extending the catalyst's service life reduces catalyst activity decay caused by chlorine poisoning, improves the safety and continuity of the unit's operation, enhances product oil quality, adapts to raw material fluctuations, and reduces operating costs.

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Abstract

The invention discloses a chlorine-containing pyrolysis oil radial moving bed reaction adsorption dechlorination hydro-conversion method, and belongs to the technical field of chlorine-containing oil product hydrotreatment and refining. According to the method, chlorine-containing pyrolytic oil is sequentially subjected to fixed bed selective hydrogenation, radial moving bed reaction adsorption dechlorination and fixed bed deep hydrofining reactor treatment; the radial moving bed is filled with a core-shell structure reaction and adsorption integrated catalyst, the core is a hydrodechlorination active component, the shell mainly adopts zinc oxide to adsorb HCl and is fixed in situ, and meanwhile, online addition and discharge of the catalyst are realized through the radial moving bed. According to the invention, poisoning of chlorine to the catalyst is effectively inhibited, the corrosion risk of equipment is reduced, shutdown of the device is avoided, the dechlorination efficiency is improved, the continuous operation period is prolonged, efficient, stable and economical hydro-conversion of the chlorine-containing pyrolytic oil is realized, and the obtained product can be used as clean fuel oil or a chemical raw material.
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