Heat of absorption and absorption capacity of CO2 in aqueous solutions of amine containing multiple amino groups

• Published in: Separation and purification technology 2014-02, Vol.122, p.112-118
• Main Authors: Kim, Young Eun, Moon, Sung Jun, Yoon, Yeo Il, Jeong, Soon Kwan, Park, Ki Tae, Bae, Shin Tae, Nam, Sung Chan
• Format: Article
• Language: English
• Subjects: Absorption; Amine; CO2 capture; Heat of absorption; Post-combustion
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/j.seppur.2013.10.030

•Enhancement of the absorption performance with aqueous amine solutions containing multiple amino groups.•Differential reaction calorimeter (DRC) was used to measure reaction heat.•CO2 loading capacity was measured using batch reactor.•The amine solutions used in this study enhance the loading capacity and regeneration energy. This study investigated the characteristics of polyamines that have two or more amino groups in their structure. They are expected to show better performance than existing absorbents due to the increased number of amino groups that can react with CO2. A semi-batch type apparatus was used to measure the absorption capacity of CO2 at the temperature range of 313–353K. The quantity of heat generated by the absorption of CO2 in the absorbents was measured with a differential reaction calorimeter (DRC) for comparison with those of aqueous solutions of MEA and DEA at 298K. The absorbents were evaluated from the aspects of the absorption capacity of CO2 and heat of absorption, and the characteristics according to the increasing number of amino groups were considered.