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**Significant progress has been made in VOCs control technologies for coal chemicals at the Low-Carbon Research Institute of the Energy Group

2022-12-22View Original

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**Significant progress has been made in the VOCs treatment technologies for coal chemical processes at the Low-Carbon Research Institute of the Energy Group. Author/Source: Coal Chemical Industry Information Network. Date: December 22, 2022. Clicks: 8. On December 14, the oxidation catalyst for volatile organic compounds (VOCs) in coal chemical processes, developed independently by the Beijing Low-Carbon Clean Energy Research Institute of the Energy Group (hereinafter referred to as the Low-Carbon Research Institute), completed 600 hours of stable operation tests on a pilot plant designed for treating VOCs from coal-to-oil processes at Ningxia Coal Industry, achieving the expected results. This marks significant progress in the development of VOCs control technologies for coal chemical industry by the Low-Carbon Institute. The group company’s science and technology innovation project, \"Development of Key Materials for the Oxidative Catalysis of VOCs in Coal Chemical Industry and Related Engineering Demonstrations,\" is carried out jointly by the Low-Carbon Research Institute and Ningxia Coal Industry under a production-research integration model. The Environmental Protection Technology Research Center of the Low-Carbon Research Institute (hereinafter referred to as the Environmental Protection Center) is responsible for analyzing VOCs emission patterns, developing core catalysts, and creating essential equipment; meanwhile, the Coal-to-Oil Branch of Ningxia Coal Industry is in charge of building pilot-scale testing platforms, conducting long-term evaluations of catalysts, and managing the construction and operation of VOCs treatment facilities. This pilot-scale test addressed the issue of VOC emissions in the decarboxylation off-gases from the Fischer-Tropsch synthesis process used in coal-to-oil production. By utilizing a highly hydrothermally stable oxidation catalyst developed by the Environmental Catalysis Team at the Environmental Protection Center of the Low-Carbon Research Institute, it was possible to achieve an outlet concentration of non-methane total hydrocarbons of less than 60 milligrams per standard cubic meter, under conditions where the operating speed was 30% higher than the designed value, the humidity was high (with a water vapor concentration of 6–11%), and the inlet concentration of non-methane total hydrocarbons was 680–960 milligrams per standard cubic meter. This figure is significantly lower than the current allowable limit for VOC emissions in coal chemical industries, which is 120 milligrams per standard cubic meter. VOCs are a key focus for air pollution control in China during the 14th Five-Year Plan period, with a requirement to reduce emissions by 10% by 2025 compared to 2020. The VOCs emitted organizedly by coal chemical enterprises have a large flow rate, low concentration, and complex composition; they are also accompanied by substances such as hydrogen sulfide and carbon monoxide, posing significant challenges for their comprehensive control. Focusing on the group company’s needs for controlling VOCs in coal chemical processes, the Environmental Protection Center of the Low-Carbon Institute has been working on the development of relevant treatment technologies since 2018. It has devised catalytic oxidation destruction processes that are more low-carbon, efficient, and safe, taking into account the VOCs emission characteristics of different process stages. A series of oxidation catalysts have been developed, with their key performance indicators reaching international advanced levels, and these catalysts are now available for industrial-scale production. The success of this pilot test has laid a technical foundation for the application of the group company’s proprietary VOCs oxidation catalysts in two catalytic oxidation treatment projects for coal-to-oil production at Ningxia Coal Industry, each with a capacity of 100,000 cubic meters per hour of exhaust gas. The Low-Carbon Research Institute will continue to work closely with Ningxia Coal Industry and Chemical Company to promote the application of this technology in VOCs treatment projects such as those in gasification and purification low-temperature methanol washing units, polyolefin silo exhaust gases, and tank farm units, thereby contributing to the \"high-end, diversified, and low-carbon\" development of the group company’s coal chemical industry.

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