MICROWAVE SWING REGENERATION OF CO2 IN BLENDED AMINE SOLUTION
In order to solve the problem of high temperature(above 100 ℃)desorption of CO2 captured by traditional process,based on the optimization of CO2 absorption conditions,a low-temperature and efficient microwave swing regeneration method was proposed.The results showed that when the mass ratio of the N-methyl ethanolamine(MDEA),piperazine(PZ)and 2-(2-aminoethylamino)ethanol(AEEA)was 3:1:5,the CO2 absorption efficiency of the mixed alcohol amine aqueous solution was the best.At an absorption temperature of 30 ℃,with the optimized blended alcohol amines as the absorption solution,when the mass fraction of the total amines was 20％,the CO2 absorption capacity of the alcohol amine aqueous solution reached 1.15 mol/mol;the desorption equilibrium could be reached at 95 ℃ for 4 min,the desorption rate of CO2 was 97.52％,and the desorption of CO2 was almost complete.Compared with the conventional heating desorption method,the CO2 desorption ratio of the microwave heating method at 95 ℃ increased by 62.25 percentage points,the desorption time was significantly shortened,and the high efficiency desorption of CO2 at low temperature was realized.
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