The first commissioning of the exhaust gas compression unit in the carbon dioxide capture system for Yulin Chemical’s 4 million tons per year CCS demonstration project and its 400,000 tons per year pilot project was successful

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The first trial run of the exhaust gas compression unit for the carbon dioxide capture system in the 400,000-ton/year CCS demonstration project and the 400,000-ton/year pilot test project carried out by Yulin Chemistry was successful. Recently, the exhaust gas compression unit provided by Shangdu for these projects was successfully tested for the first time, which marks an important breakthrough in the key technical equipment used in China’s CCS field. This success also lays a solid foundation in terms of equipment for the steady progress of these projects. Located in Yulin, Shaanxi, this project is currently the largest CCS project in China. The project focuses on the advanced, diversified, and low-carbon development of the coal chemical industry, and is divided into three phases, with the goal of ultimately creating a **class CCS demonstration model characterized by technological autonomy, large-scale engineering implementation, commercial operation, and replicable business models**. Among them, the pilot test project can achieve an annual reduction of 400,000 tons of CO2 emissions, which is equivalent to adding 400,000 mu of forest area; it provides an industrial-grade test platform for large-scale CO2 sequestration in aquifers across the country. The unit that succeeded in this test is a 15MPa-class single-axis centrifugal CO? compressor independently developed by Shaanxi Gas Turbine. This unit is the first high-pressure centrifugal carbon dioxide compressor in China to be applied in CCS systems. The overall compression ratio exceeds 120, and the pressure difference is over 140 bar; the high exhaust pressure and high exhaust density impose almost stringent requirements on the long-term operational stability and reliability of the unit.