The Experimental And Analysis Research On The Chemical Degradation And Thermal Degradation Of CO₂ In Alkenamine Solvent Absorption

The absorption of CO₂ by organic amine compound amine solution is highly applied because of its high absorption rate,easy preparation of drugs,and the most extensive application in many ways of carbon dioxide capture.The most effective process is the most mature technology.The method also has the problem that the viscosity of the absorbents is greatly expanded,the corrosion of the equipment is stronger and the solvent degradation in the multiple circulation solution is large.In this paper,a study on combination of enamine enamine solutions to solution absorption and degradation of CO₂ occurred in the process of selecting two ethylene three amine?DETA?,TETA?three TEPA,four ethylene amine??four ethylene five amine?three enamine based absorbent absorbent and N-methyl two ethanol amine?MDEA?,PZ?pethidine hydrochloride?as absorbent.First examine the mole ratio respectively?20:1,20:2,20:3,20:4,20:5,20:6?6 different molar ratios of DETA+MDEA,DETA+PZ,TETA+MDEA,TETA+PZ,TEPA+MDEA,TEPA+PZ first cycle of absorption and desorption properties;the absorption desorption of enamine compound solution to compare 36 different molar ratios of the performance,selected good 20:4 DETA+MDEA,20:4 DETA+PZ,20:5 TETA+MDEA,20:4 TEPA+MDEA,20:4 TEPA+PZ 6 kinds of enamine compound drugs.6 different molar ratios of alkene amines were used for 6 cycles absorption and desorption experiments respectively.To study their absorption and desorption performance and cyclic amine degradation rate;through the enamine compound solution to compare 6 different molar ratios of the 6 cycles of absorption load,absorption rate,desorption rate and desorption load,screened two kinds of enamine compound drugs:20:5TETA+MDEA,20:good 4TEPA+MDEA,2 kinds of enamine compound drugs.Finally,the intelligent high pressure reaction.The absorption and desorption properties of 6 different molar ratios of DETA+MDEA,DETA+PZ,TETA+MDEA,TETA+PZ,TEPA+MDEA,and 20:1 were studied under the condition of absorption temperature of 40?and desorption temperature of 120?,and 6different molar ratios of?20:2,20:3,20:4,20:5 and 20:6?.The results showed that the absorption and desorption properties of 20:4 DETA+PZ,20:4 DETA+PZ,20:5 TETA+MDEA,20:4 TEPA+MDEA and 20:4 TEPA+PZ 6 were better than those of 6 different molar ratios.DETA,TETA and TEPA were the main absorbents respectively.The molar ratio was20:4220:5:PZ and MDEA were added to form 6 two amine compound amine solutions with total amine concentration of 0.8mol/L.The 6 cyclic absorption load,absorption rate,desorption rate and desorption load of 6 kinds of compound amine solutions were compared and investigated.The absorption effect from high to low order:20:4 TEPA+MDEA>20:5TETAE+MDEA>20:4 TEPA+PZ>20:4 DETA+PZ>20:4 TETA+PZ>20:4 DETA+MDEA,6 cycles for size comparison desorption screened 6 complex enamine amine solution:20:4TEPA+MDEA>20:4 TEPA+PZ>20:4DETA+MDEA>20:4TETA+PZ>20:4 DETA+PZ>20:5TETA+MDEA,on the amine degradation rate from high to low order:20:4DETA+MDEA>20:4 TETA+PZ>20:4 DETA+PZ>20:4 TEPA+MDEA>20:4 TEPA+PZ>20:5TETA+MDEA.The above 6 different molar ratio of allyl amine compound solution,the two better alkenamine compound solutions are:20:5 TETA+MDEA,20:4 TEPA+MDEA.Study of thermal degradation experiment,using intelligent autoclave of different molar ratios of 20:5 TETA+MDEA and 20:4 TEPA+MDEA compound enamine without adding CO₂load,at 120 degrees,2.0MPa,degradation of 240h,and made the same set of control variables were investigated with load experiment,CO₂?0.4mol/mol?and different temperature?110DEG,120 DEG C 130 C?conditions and whether the effect of adding rate of amine degradation thermal degradation of metallic iron ions on two different molar ratio of20:5TETA+MDEA and 20:4 TEPA+MDEA in.The experimental results obtained by the control variables,CO₂ load and temperature?T?increases 20:5 TETA+MDEA and amine degradation rate of 20:4 TEPA+MDEA,iron ion had no effect on the degradation rate of 20:5TETA+MDEA and 20:4 TEPA+MDEA amine,which acts as a catalyst in 20:5 TETA+MDEA,20:4 TEPA+MDEA thermal degradation process.The oxidation degradation experiment is based on the controlled variable thermal degradation experiment,adding O₂ at 120 2.0MPa and adding CO₂ to explore the effect of CO₂ loading and iron ion?FeCl₃?on the degradation rate of 20:5 TETA+MDEA and 20:4TEPA+MDEA.The experimental results showed that the degradation rate of 20:5TETA+MDEA and 20:4 TEPA+MDEA was the lowest under pure oxidation,and the degradation rates of 20:5 TETA+MDEA and 20:4TEPA+MDEA were increased by CO₂loading and Fe³⁺.The most influential factors are CO₂ load,Fe³⁺time,and O₂ impact.