Kefufeng Coking Plant Gas to High-Purity Ammonia Production Technology Comprehensive Utilization Project

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High-purity gases play a crucial role in modern industrial systems, and especially in the electronics industry, their importance is comparable to that of gold. The level of purity directly determines the quality and performance of the downstream products. For a long time, this critical field has been monopolized by a few large gas companies such as those in Germany, France, and the United States, which has severely restricted the independent development of related industries in our country. High-purity ammonia, serving as a basic material for the production of nitrogen trifluoride and silicon nitride, is widely used in industries such as LED lighting and display panels, the manufacturing of photovoltaic solar silicon wafers, and the production of integrated circuit chips. Products of 7N grade high-purity ammonia have an extremely high added value. Hebei Zhongke Fufeng Hydrogen Energy Technology Co., Ltd., a holding subsidiary of Zhongke Fuhai (hereinafter referred to as “Zhongke Fufeng”), has invested in a project for the comprehensive utilization of coke oven gas to create high-value products. This project has been successfully designed to produce 7N-grade high-purity ammonia and hydrogen using coke oven gas as raw material, thereby enabling carbon reduction and cost savings while improving efficiency. Its safety, reliability, and energy consumption levels are all at international advanced standards. Once operational, the project is expected to produce 35,000 tons of synthetic ammonia, 98,000 tons of liquefied natural gas, 24 million standard cubic meters of high-purity hydrogen, as well as a range of by-products, with annual revenue reaching 900 million yuan. The high-purity ammonia production technology used in this project was independently developed by Zhongke Fuhai; by cleverly separating and extracting the useful components from coke oven gas, it is possible to produce liquid ammonia, 20% ammonia water, electronic-grade ammonia products, as well as liquefied natural gas and high-purity hydrogen. Among them, the resistance of the 10,000 cubic meter LNG full-volume tank to liquid volatility is among the best in the industry. The successful development of this project not only meets the high-quality requirements of industries such as semiconductor integrated circuits, but also fills the gap in China regarding the production of high-purity ammonia using coke oven gas as a raw material, thereby reversing the situation in which foreign companies dominated the domestic market for high-purity ammonia. Furthermore, this project also has significant advantages in terms of environmental protection. The high-value comprehensive utilization of coke oven gas truly achieves green, low-carbon, and zero-emission outcomes. Compared with the traditional method of generating electricity by burning coke oven gas, the technical process developed by Zhongke Fufeng enables the carbon in the raw materials to be solidified within the LNG product, resulting in a reduction of carbon dioxide emissions by 62,000 tons; meanwhile, the output value can reach up to 470 million yuan. The production of LNG from coke oven gas represents an important strategic development direction; it not only solves the problem of what to do with coke oven gas but also promotes emission reduction in both directions. It serves as a model and example for improving the energy usage structure and advancing energy conservation and carbon reduction. This project helps to enhance the region of Beijing, Tianjin, and Hebei’s capacity for emergency peak shaving and supply security in terms of natural gas, optimizes the energy structure of this region, enables sharing of energy equipment, reduces costs associated with such equipment and operations, and fosters mutual benefit. It also contributes to the development of resource-efficient and environment-friendly enterprises in the area, as well as to the achievement of energy conservation and emission reduction goals.