화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.37, No.3, 419-426, 2014
Carbon Dioxide Absorption in Triethanolamine Aqueous Solutions: Hydrodynamics and Mass Transfer
The carbon dioxide absorption process by triethanolamine aqueous solutions was analyzed in a bubble-column reactor taking into account the chemical reaction mechanism, gas-liquid interfacial area, and mass transfer rate. A speciation study of this gas-liquid system was developed by H-1 and C-13 NMR spectroscopy in order to obtain the reaction mechanism and stoichiometry. The gas-liquid interfacial area was evaluated considering the variations of bubble size distribution and gas holdup during the operation time. The liquid-phase mass transfer coefficient was calculated from the carbon dioxide absorption rate data by interfacial area evolution and reaction stoichiometry.