ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Enzyme-enhanced CO₂ absorption process in rotating packed bed

Justyna Wojtasik, Konrad Gładyszewski, Mirko Skiborowski, Andrzej Górak, and Marcin Piątkowski

Lodz University of Technology, Lodz, Poland

E-mail: justyna.wojtasik@p.lodz.pl

Abstract: Carbon dioxide is considered the most important contributor to the global warming effect. To reduce greenhouse gas emissions, CO₂ should be separated from the exhaust gas stream in a selective way. The most often applied technology to capture CO₂ from exhaust gases is the reactive absorption in aqueous amine solutions, which is currently widely used in different industrial applications. The efficiency of this technology could be improved by applying high-gravity technologies that intensify mass transfer and can enable substantial equipment size reduction compared to the traditionally used packed columns. Rotating packed bed (RPB) technology meets these requirements very well. Applying innovative materials such as the highly efficient enzyme carbonic anhydrase can further improve the efficiency of the CO₂ absorption process. This combination of intensified technology together with new solvents is expected to improve the total efficiency of CO₂ absorption. In this study, we present our experimental results of CO₂ absorption using 30 wt% N-methyldiethanolamine (MDEA) solution in water in an RPB unit with and without carbonic anhydrase for different gas and liquid flow rates. The results indicate significantly improved performance of CO₂ absorption, up to 18 times compared to the solvent without enzyme.

Keywords: Rotating packed bed ; RPB ; CO₂ absorption ; Carbonic anhydrase ; MDEA 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-018-0647-8

Chemical Papers 73 (4) 861–869 (2019)