Carbon Dioxide (CO2) Solubility in Diethylenetriamine and 2-Amino-2-Methyl-1-Proponal (DETA-AMP) Solvent System for Amine-Based CO2 Capture in Flue Gas from Coal Combustion

摘要

The CO2 absorption-desorption potentials of diethylenetriamine (DETA)+2-amino-2-methyl-1-proponal (AMP) bi-solvent blend were investigated. Absorption temperature and CO2 partial pressure (P_(CO2)) was298-333 K and 5-100 kPa, respectively while the desorption temperature was 363 K. The concentrations of DETA and AMP were varied from 0.5-2 kmol/m~3 and 1-2.5 kmol/m~3, respectively with the total concentration of 3 kmol/m~3. Equilibrium CO2 loading of the blends increased exponentially with P_(CO2)2. The initial rate of absorption and desorption of the blends were higher than 5 kmol/m~3 MEA and the heat duties were much lower than the single MEA.