Proton transfer step in the carbon dioxide capture by monoethanol amine: a theoretical study at the molecular level.
An aqueous solution of monoethanol amine (MEA) has been utilized in an industrial process of CO(2) absorption. The chemical reaction between CO(2) and MEA, which is employed in the process, consists of two steps. After the formation of the MEA-CO(2) complex ("capture"), a proton transfers from the complex to give a final product. In the present study, the overall mechanism of the reaction is discussed, especially focusing on the proton transfer step. Using RISM-SCF-SEDD, a hybrid method of electronic structure theory and statistical mechanics for molecular liquid, we clarified that the role of MEA as a base is crucial in the proton transfer step.
Department of Molecular Engineering, Kyoto University, Kyoto, 615-8510, Japan.
Kenji
K
Iida
Hirofumi
H
Sato