Absorption capacity and viscosity for CO2 capture process using high concentrated PZ-DEAE aqueous solution

The absorption capacity of CO 2 in piperazine (PZ) promoted 2-diethylaminoethanol (DEAE) aqueous solution was measured. The viscosities of both CO 2 -unloaded and CO 2 -loaded PZ-DEAE aqueous solutions were measured and then modelled. The temperatures ranged from 303.2   K to 323.2   K. The mass fraction of PZ and DEAE respectively ranged from 0 to 0.075 and 0.3 to 0.5. The temperature and concentration dependences of absorption capacity were determined. The effects of temperature, mass fraction and CO 2 loading on viscosities are demonstrated.