Abstract: CCUS is one of the potential ways to control CO₂ from fossil fuel utilization. CO₂ Chemical absorption technology is regarded as one of the most promising technologies for CO₂ capture. Chemical absorption solvents are the key technologies of the system. Solvent screening, performance tests, and degradation properties were introduced. Hybrid chemical absorbents, which involve blending two or more chemical absorbents to leverage the characteristics and performance of each, have been studied and evaluated. Several advanced solvents such as biphasic solvents and water-lean solvents have attracted considerable attention due to their lower operating temperature, energy savings, and higher cyclic capacity. However, the high viscosity and emissions of the new solvents, which affect their utilization, have been addressed. This report will give an overview of solvent selection and management. The presentation will also introduce new PP packing material development and high-efficiency plate heat exchanger research. With regard to the energy-saving process, the study focuses on the interstage cooling, staged flow process and MVR process. A 150 kt/y post-combustion carbon dioxide capture demonstration project of a coal-fired power plant was designed and erected at Guoneng Jinjie Power Plant of China, which adopted advanced mixed amine absorbent, high-efficiency plate heat exchanger and plastic packing, coupled with the energy-saving process "interstage cooling + MVR + staged flow". The measurement results showed that the carbon dioxide capture rate exceeded 90% and the purity of carbon dioxide after capture reached 99.5%. The minimum regeneration energy consumption after comprehensive optimization was 2.3–2.4 GJ/t CO₂. Economic analysis showed the CO₂ capture operation price attained US$ 30/t CO₂. The project will supply a promising solution for the coal-fired power plant to realize low CO₂ emission.

Biography: Prof. Mengxiang Fang studied at the Department of Engineering Thermal Physics of Zhejiang University from 1981 to 1991 and received his PhD degree in December 1991. He has worked at the Energy Engineering Department of Zhejiang University as a lecturer, associate professor, and full professor since 1991. He is now the Director of Qingshanhu Energy Research Center of Zhejiang University. He has focused on research in CO₂ capture technology for more than 30 years. His research covers mixed amine, biphasic solvents, water-lean solvents, ionic liquids, solid acid catalysts, solvent degradation and HSS removal, plastic packing, high-efficiency heat exchangers, and new energy-saving processes. He has been responsible for completing more than 40 projects, including three National Natural Science Foundation projects, the National Key Basic Research Project (973), the National High Technology Research and Development Project (863), an EU cooperation project, and China international cooperation projects. He also participated in the 150 kt/y CO₂ capture project at Jinjie Power Plant as the technology lead, the 15 kt/y CO₂ capture project at Lanxi Power Plant, and the 500 kt/y CO₂ capture project at Taizhou Power Plant. He holds more than 20 patents and has presented more than 300 papers in journals and conferences. He has received many awards from the government and associations.