A Study On Carbon Dioxide Absorption Using The Organic Amine Solution

Absorption of CO2 with amines has been extensively studied because of the environmental concern of CO2 mitigation and for CO2 is also a potential carbon resource. The fossil-fuel power plant that mainly combusts the coal is the large family which emissions CO2, and if the CO2 in fuel gas can be recovered, it is a work that has both better social and economic benefits. This article conducted preliminary experiments in order to develop more effective absorbents and accumulate necessary and valuable experimental data. The solution method is a traditional method for absorption of concentration CO2.We conducted preliminary experiments in order to study more effective absorbents and to further develop such kind of research and accumulate necessary and valuable experimental data.A study of carbon dioxide (CO2) absorption performance has been carried out in Piperazine (PZ) N-aminoethyl piperazine (N-AEPZ) and hydroxyethyl piperazine (HEPZ) under a total 40% weighed amines solutions. And a study of carbon dioxide(CO2) absorption performance has been carried out aqueous amine solutions under the mass content of 30%AEE+10%PZ,30%AEE+10%N-AEPZ and 30%AEE+10%HEPZ.The absorption process estimated the interrelation of absorption rate, absorption capacity, absorption time, content and system temperature. The absorption temperature is controlled at 313K. The temperature of desorption is controlled at 393K and this process estimated the interrelation of absorption capacity and absorption time.The effect of CO2 absorption using NMP as solutions instead of water mixed with the MEA and AMP was investigated. A study on the relationships between the absorption rate, absorption capacity, absorption load and absorption time, the influence of absorption temperature on absorption rate was discussed in MEA+NMP solution with different concentrations (20wt%-50wt%). And the investigation of CO2 absorption and regeneration performance has been carried out under MEA+AMP+NMP solutions. The results indicate that MEA+NMP and MEA+H2O solutions have the same absorption rate, absorption capacity, absorption load.This experiment indicates the molecular structure of alcamines with amino group can help improving absorption function. In the composite system, N-AEPZ is the main absorption, PZ and AEE absorb CO2 together and in 30%AEE+10%HEPZ amines solutions, AEE is the main absorption. So improving the concentration of the main absorption component can increase the absorptive capacity, and the mixed solution of 30%AEE+10% N-AEPZ and 30%AEE+10%PZ put a good actual operation in both absorption and desorption process. The temperature has little effect on the rate of absorption in MEA+NMP solution.The higher concentration of MEA, the absorption load becomes smaller. The absorption rate, absorption and desorption capacity of MEA+AMP solution increase with the concentration of MEA increasing, but it takes longer time to regenerate CO2. The solution with NMP does not evaporate under desorption temperature for reducing the equipment investment.