【Ten Years of Rapid Development in Chemical Engineering Equipment】Domestic production of N2O emission reduction catalysts for furnaces achieved from 2016 to 2019

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This post was last edited by Desert Fish on 2022-12-12 at 23:05. Watch the decade-long development of chemical processing equipment; praise the prosperity and strength of modern China. Replies are rewarded; discussions are welcome. ------------------------------------------- On January 21, 2019, the research, development, and application project for N2O emission reduction catalysts, independently developed by Sichuan Shutai Chemical Technology Co., Ltd., passed the expert evaluation organized by the China Nitrogen Fertilizer Industry Association. The N2O emission reduction catalyst developed for this project is low in cost, enabling the localization of such catalysts for use in nitric acid production. With the implementation of **carbon emission reduction policies, the market prospects for this catalyst are expected to be favorable. 　　This catalyst is prepared using a novel co-precipitation method and high-temperature calcination (1000°C–1300°C), which enables the active components to be more evenly dispersed within the zirconium-cerium solid solution. It possesses good thermal stability, a low volume shrinkage rate, and is resistant to pulverization; it can operate at high temperatures (above 850°C) for extended periods with slow degradation of its catalytic activity. 　　During the project implementation, Shutai Chemical developed new catalyst pressing molds. The catalysts are 11 mm in diameter and have a seven-hole cylindrical shape; they possess good mechanical strength and a large contact area, which facilitates gas diffusion as well as adsorption/desorption, resulting in effective mass and heat transfer. During the catalyst shaping process, additives are used to increase the specific surface area of the catalysts, thereby increasing the number of reactive sites and enhancing the catalyst’s catalytic efficiency. 　　The expert group put forward three recommendations regarding this catalyst: reducing the catalyst’s diameter, further optimizing the catalyst production process to improve emission reduction efficiency; optimizing the production process to further reduce costs; and promoting the widespread use of this product. 　　It is understood that the current decomposition technique for domestic N2O emission reduction catalysts is low-temperature ex-situ decomposition (400°C–500°C), which requires additional equipment and energy consumption, thus having a significant impact on normal production activities. The N₂O emission reduction catalyst for nitric acid production furnaces, developed by Shu Tai Chemical, features a moderate cost and performance levels comparable to those of similar foreign products. It has been put into industrial production, filling the gap in domestic technology for the in-furnace decomposition of N₂O using such catalysts. Existing production equipment can be used with this catalyst without any modifications; it enables more effective emission reduction while not affecting the normal operation of production processes. 　　To date, the environmentally friendly catalyst for the direct decomposition of N2O in nitric acid production has been industrialized on a global scale only by Johnson Matthey, and its price is extremely high. The N2O emission reduction catalyst developed by Shu Tai Chemical has been installed in the nitric acid production unit of Sichuan Jinxiang Chemical Co., Ltd., and it has performed well.