MAP-DMSO-PMDETA三元相变吸收剂的CO2捕集性能OA北大核心CSTPCD

A novel MAP-DMSO-PMDETA ternary phase change absorbent was prepared using secondary amine 3-methylamino-1-propanol(MAP)as the main absorbent,dimethyl sulfoxide(DMSO)as the organic diluent,and pentamethyldiethylenetriamine(PMDETA)as the auxiliary absorbent.The phase change behavior and CO2 absorption capability of the absorbent were investigated.The experimental results show that:Under the optimal conditions of mass ratio of MAP to DMSO to PMDETA 3∶6∶11,absorption temperature 40℃,CO2 volume fraction 10%,and air inlet flow 1.25 L/min,liquid-liquid phase separation occurs after absorption saturation,with 0.79 mol/kg of the absorbent loading amount,0.47 mol/mol(calculated as MAP)of the absorbed load,and 45.1%of the volume fraction of the rich phase which 95.1%of CO2 is enriched,while the viscosity of the rich phase is only 11.83 mPa·s;This ternary phase change absorbent not only has excellent desorption performance,but also has good cycle stability.After 5 absorption-desorption cycles,the desorption load is stable at about 0.34 mol/mol(calculated as MAP),and the desorption efficiency can reach 69.4%.