Absorbent characterization for CO2capture using wetted-wall column and reaction calorimetry

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Abstract

The absorption characteristics of chemical solvents for CO2capture have been investigated using a wetted-wall column and reaction calorimetry. The overall mass transfer coefficient (KG) and reaction heat (Delta;HR) of subject solvents have been measured. Aqueous solution of monoethanolamine (MEA), 2-amino-2-methyl-1-propanol (AMP), and KIER-C3, a newly proposed chemical, have been used for the study. It was found that (KG) value of MEA exhibited the highest among the test solvents. The order of (KG) values with different absorbent solution was found to be ∼10-10kmol/m2·s·Pa or higher. The reaction heats of solvents were obtained from the measurement of heat associated with the absorption reaction between the solution and absorbed CO2molecules. The observed value of reaction heat of MEA was ∼80 kJ/mol at lower loading or less than 0.5 mol CO2/mol-MEA. It is noted that the other criteria such as the absorption capacity, corrosiveness, thermal degradation properties, etc. together with absorption characteristics should be further investigated for the development of absorbent chemical. © 2011 Published by Elsevier Ltd.

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Han, K., Ahn, C. K., & Kim, J. Y. (2011). Absorbent characterization for CO2capture using wetted-wall column and reaction calorimetry. In Energy Procedia (Vol. 4, pp. 548–553). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2011.01.087

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