Chin.J.Chem.Eng. ›› 2019, Vol. 27 ›› Issue (3): 628-633.doi: 10.1016/j.cjche.2018.11.027

• Chemical Engineering Thermodynamics • Previous Articles     Next Articles

Heat of absorption of CO2 in aqueous N,N-diethylethanolamine+ N-methyl-1,3-propanediamine solutions at 313 K

Katarzyna Sobala, Hanna Kierzkowska-Pawlak   

  1. Lodz University of Technology, Faculty of Process and Environmental Engineering, Lodz 90-924, Poland
  • Received:2018-07-03 Revised:2018-09-04 Online:2019-03-28 Published:2019-04-25
  • Contact: Hanna Kierzkowska-Pawlak,E-mail

Abstract: Differential heat of absorption of CO2 in aqueous solutions of N,N-diethylethanolamine (DEEA) and activated DEEA solutions up to a total concentration of 2 mol·L-1 was measured as a function of CO2 loading at 313.15 K using a reaction calorimeter. In order to analyze the performance of N-methyl-1,3-propanediamine (MAPA) as an activator, DEEA blended solutions containing 0.05, 0.1 and 0.2 mol·L-1 MAPA were studied. The heat of CO2 absorption in single DEEA solutions was unaffected by changing the DEEA concentration in the range of (0.5-2) mol·L-1. On the other hand, increasing the concentration of MAPA in aqueous amine mixtures of (DEEA + MAPA) raised the heat of absorption.

Key words: CO2 capture, Differential heat of absorption, N,N-diethylethanolamine, N-methyl-1,3-propanediamine, Amine blends