Absorption of CO2 into aqueous solutions of MEA and AMP in a wetted wall column with film promoter

Author(s)

Rodriguez-Flores, H. A. ^[1] ; Mello, L. C. ^[1] ; Salvagnini, W. M. ^[1] ; de Paiva, J. L. ^[1]

Affiliation

^[1] Univ Sao Paulo, Polytech Sch, Dept Chem Engn, BR-61548 Sao Paulo - Brazil

• Document type: Review article
• Source: CHEMICAL ENGINEERING AND PROCESSING; v. 73, p. 1-6, NOV 2013.
• Web of Science Citations: 10

Abstract

The process for removing CO2 from a gas mixture can be achieved by absorption into amines through of different conventional techniques. But, the report of mass transfer parameters that can be used for process design is limited. Thus, a study of CO2 absorption process into monoethanolamine (MEA), 2-amino-2-methyl-1 -propanol (AMP) and their respective blend were developed with the aim of evaluating the absorption performance and of determining a design parameter for a single-amine absorption system. The experimental tests were carried out in a wetted wall column employing a film promoter, a thin stainless steel woven. The experimental device was operated in countercurrent and the different tests were developed at 298 K, atmospheric pressure, a constant gas load (10% CO2) and three different liquid loads. The results show that the interfacial area is influenced by increasing the liquid load. The K(G)a values of MEA and the blend based on it are higher in relation to AMP. Moreover, the results of the thermodynamical-kinetic parameter show that this absorption process is independent of liquid load, characteristic of rapid chemical reactions. The K(G)a value for the different MEA:AMP mixtures shows that it increases when the MEA proportion is increased in the blend. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 09/54228-7 - Characterization and comparasion of the CO2 absorption into blended alkanoamines and other solvents in packed columns
• Grantee: José Luís de Paiva
• Support Opportunities: Regular Research Grants