Supported by the National Natural Science Foundation of China, the project measured the physical and chemical properties of polyol-ethylenediamine system, such as density, viscosity, gas-liquid equilibrium of CO₂ absorption, and determined the optimal solution composition and process parameters of CO₂ absorption. When the absorption temperature is 20 ~ 70℃ and the regeneration temperature is 95 ~ 110℃, high-purity CO₂ can be obtained and the continuous operation is stable. Compared with the existing carbon capture technologies, the amine loss can be reduced by 80%. The mechanism and law of carbon capture were proved. A kind of white CO₂SM solid was prepared at kilogram level for the first time; When used as chemical fertilizer to activate the growth of plants (tomato, cucumber, eggplant and green pepper), it is (111-208)% stronger than NH₄HCO₃. At the same time, as a new raw material and regulator for the preparation of nano CaCO₃, CO₂SM can be recycled.
The research results of the project have published 40 SCI indexed papers in well-known journals at home and abroad, including 7 top papers (2 in zone I and 5 in zone II), which provides an important reference for the development of efficient CO₂ capture and chemical conversion and utilization technology.