Overview of the Development of the Coal Chemical Industry

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Overview of the Development of the Coal Chemical Industry 1. Coal coking. The coking industry is the most developed and representative coal chemical industry, as well as the main supporting industry for blast furnace ironmaking in the metallurgical industry and casting in the machinery industry. China’s coal gas purification technology has reached world-class levels; dry quenching of coke, on-site dust treatment systems, and wastewater treatment have all entered the practical application stage. The quality of coke has improved significantly, and the refining technology for its main chemical products has reached or come close to world-leading standards. 　　2. Gasification and its synthesis technologies. Coal gasification is the most important unit technology for the industrial development of coal chemical industry, and it is widely used in industries such as chemicals, metallurgy, machinery, and building materials, as well as in enterprises that produce city gas. Synthesis technologies mainly include ammonia synthesis using coal gasification as a raw material, as well as coal indirect liquefaction technology. 　　3. Direct coal liquefaction. The process of directly obtaining liquid products by heating coal and carrying out pressurized hydrogenation is known as direct coal liquefaction. Our country has currently developed highly active coal liquefaction catalysts, and completed experiments on converting the crude oil obtained from coal liquefaction into qualified gasoline, diesel, and aviation kerosene. 　　4. Gasification combined cycle power generation (IGCC). This is a combined cycle power generation system led by gasification, a technical system that integrates advanced gasification and power generation technologies to achieve high efficiency, low pollution, and larger scale in coal-based power generation. Its net power generation efficiency can reach 43%–45%, while its pollutant emissions and water consumption are only 1/10 of those of conventional coal-fired power plants, and 1/2–1/3 respectively. 　　5. Co-production technology system. Cogeneration is a technical system that combines energy conversion with the synthesis of chemical products, aiming to achieve low or zero emissions of pollutants, as well as the comprehensive utilization of resources and efficient use of energy. It turns out that systems produced separately can be simplified during recombination; the complementarity of different processes improves overall efficiency, ultimately reducing product costs.