Influence of the composition of concentrate solutions on the efficiency of carbon dioxide removal from monoethanolamine aqueous solution by electrodialysis

• Published in: Petroleum chemistry Vol. 54; no. 8; pp. 680 - 685
• Main Authors: Novitsky, E. G., Vasilevsky, V. P., Bazhenov, S. D., Grushevenko, E. A., Vasilyeva, V. I., Volkov, A. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.12.2014; Springer
• Subjects: Carbon dioxide; Chemistry; Chemistry and Materials Science; Ethanolamines; Industrial Chemistry/Chemical Engineering; carbon dioxide; monoethanolamine; desorption; electrodialysis; absorption
• ISSN: 0965-5441; 1555-6239
• DOI: 10.1134/S0965544114080118

The feasibility of optimizing the electromembrane removal of carbon dioxide from an aqueous monoethanolamine (MEA) solution with a CO 2 /MEA molar ratio of 0.2 after the regeneration stage aimed to reduce the loss of MEA with the concentrate has been explored. The influence of the composition of the concentrate solution on the recovery of carbon dioxide and the specific loss of MEA (g MEA/g CO 2 recovered) for a process duration of 1 h has been studied. The solution in the concentration cells was either distilled water or aqueous MEA solutions with a different carbon dioxide loadings. It has been found that the CO 2 recovery ranges within 56.6–66.5%; the maximum and minimum specific losses of MEA make 4.80 and 1.49 g MEA/g CO 2 recovered; and the specific energy consumption is 6.48–9.72 MJ/kg CO 2 recovered.