Absorption of CO2 in Aqueous K2CO3 Absorbents at Pre-Combustion Condition

연소전 조건에서 탄산칼륨계 흡수제의 이산화탄소 흡수특성

  • You, Seung-Han (School of civil and Environmental Engineering, Kunsan National University) ;
  • Oh, Myoung-Seog (School of civil and Environmental Engineering, Kunsan National University) ;
  • Cha, Wang-Seog (School of civil and Environmental Engineering, Kunsan National University)
  • 유승한 (군산대학교 토목환경공학부) ;
  • 오명석 (군산대학교 토목환경공학부) ;
  • 차왕석 (군산대학교 토목환경공학부)
  • Received : 2010.12.22
  • Accepted : 2011.02.10
  • Published : 2011.02.28


The absorption capacity and initial absorption rate of $CO_2$ into aqueous $K_2CO_3$ solutions were measured by using VLE(Vapor-Liquid-Equilibrium) equipment in the pre-combustion condition. Absorption experiments were conducted within the temperature range of $40{\sim}80^{\circ}C$ while increasing the $CO_2$ pressure from 0 to 50bar. The effect of $K_2CO_3$ concentration was investigated by varying in the range of 5~20%. As a results, the absorption capacity and initial absorption rate were increased with increasing $K_2CO_3$ concentration in the absorbents. Also, the initial absorption rate was highest at $40^{\circ}C$. Further more, we have studied the effect of adding piperazine and homopiperazine to $K_2CO_3$ solutions. The results showed that absorption capacity of $CO_2$ was somewhat increased by adding piperazine.


Carbon dioxide;Potassium-Carbonate;Pre-Combustion;Absorption


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