The Optimization of Mixing Amine Solvents for CO2 Absorption Based on Aqueous MDEA/DETA and MDEA/TETA

Mixed amine solvents have gained increasing attention in recent years. The absorption and desorption performance of mixed amine solvents for CO2 were analyzed by experiments. The absorption rate, absorption load, and desorption rate were used as the evaluating index. The experiment results show that the smaller proportion of MDEA/DETA solvents is the higher absorption load and absorption rate are, but the final desorption degree does not rise. When the rate of TETA is high, it is helpful to improve absorption rate and reduce desorption time of MDEA + TETA, but it is not necessary to add excessive TETA into mixed amine solvents.