Research progress and prospects on the preparation of catalysts from coal gasification slag

KOU Lihong; WANG Guanyu; LIU Hong; LIU Min; LI Lanting

doi:10.3969/j.issn.1007-7677.2025.03.005

Abstract：As a core area of modern coal chemical industry development,coal gasification engineering is one of the main ways to clean and efficiently utilize coal.Various coal gasification technologies have emerged with economic de-velopment,but it also leads to the production of a large amount of coal gasification slag.Therefore,it is necessary to deeply treat the resources such as carbon,inorganic minerals,and heavy metals in coal gasification slag that have not been gasified,in order to promote the comprehensive development and utilization of industrial solid waste according to the value of elements,and to improve the high-value utilization of industrial solid waste in various fields.The genera-tion,classification,and physicochemical properties of gasification slag were introduced,the advantages of preparing catalysts from gasification slag based on its unique physical and chemical properties were analyzed,and the challen-ges and potential opportunities faced by successfully prepared catalysts in various fields were discussed in depth.In the process of preparing catalysts for coal gasification slag,it is necessary to consider the differences in the physical and chemical properties of different coal gasification slag due to the origin,furnace type,and gasification process of the raw coal.Different preparation processes should be considered according to different types of coal to explore the influence of physical and chemical properties on catalyst preparation,fully utilizing its advantages of high carbon con-tent,porous structure,and high activity,and developing a simple and adaptable coal gasification slag catalyst prep-aration route.The graded utilization of inorganic minerals and residual carbon components in coal gasification slag are efficiently achieved by appropriate carbon ash separation,simultaneous utilization methods,strengthen component conversion and modification to reduce their impact on the environment.The goal of waste reuse is achieved by the use of catalysts prepared from coal gasification slag for treating various pollutants to promote its large-scale consumption and resource reuse,realizing green and low-carbon circular utilization.