CO2 desorption performance from imidazolium ionic liquids by membrane vacuum regeneration technology

Abstract: In this work, the membrane vacuum regeneration (MVR) process was considered as a promising technology for solvent regeneration in post-combustion CO2 capture and utilization (CCU) since high purity CO2 is needed for a technical valorization approach. First, a desorption test by MVR using polypropylene hollow fiber membrane contactor (PP-HFMC) was carried out in order to evaluate the behavior of physical and physico-chemical absorbents in terms of CO2 solubility and regeneration efficiency. The ionic liquid 1-ethyl-3-methylimidazolium acetate, [emim][Ac], was presented as a suitable alternative to conventional amine-based absorbents. Then, a rigorous two-dimensional mathematical model of the MVR process in a HFMC was developed based on a pseudo-steady-state to understand the influence of the solvent regeneration process in the absorption-desorption process. CO2 absorption?desorption experiments in PP-HFMC at different operating conditions for desorption, varying vacuum pressure and temperature, were used for model validation. Results showed that MVR efficiency increased from 3% at room temperature and 500 mbar to 95% at 310K and 40 mbar vacuum. Moreover, model deviation studies were carried out using sensitivity analysis of Henry's constant and pre-exponential factor of chemical interaction, thus as to contribute to the knowledge in further works.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Vadillo J.M., Gómez-Coma L., Garea A., Irabien A.,

 Fuente: Membranes, 2020, 10(9), 234

Editorial: MDPI

 Fecha de publicación: 14/09/2020

Nº de páginas: 25

Tipo de publicación: Artículo de Revista

DOI: 10.3390/membranes10090234

ISSN: 2077-0375

Proyecto español: CTQ2016-76231-C2 ; PID2019-108136RB-C31