Application of enzyme integrated supported ionic liquid membranes and poly(ionic liquid)-free ionic liquid composite membranes in CO2-N2 separation
(2018) GEPROC 2018 — Location: Liège, Belgium (29.October.2018)
Files
MOLINAFERNANDEZ_CRISTHIAN_Geproc2018.pdf
Restricted Access - Adobe PDF
- 82.48 KB
Details
- Authors
- Abstract
- Global warming is a major problem of our current society. Since our energy demand is continuously increasing it is still expected to rely on fossil fuel supply in the following years [1]. That is why much effort has been dedicated to find industrially feasible solutions to recover the CO2 present in flue gases. But typical conditions of flue gases (high temperature and low CO2 concentration) makes more difficult to recover CO2 [2]. Aiming to provide technical solutions several researches have investigated the application in gas permeation of supported ionic liquid membranes (SILM) and poly(ionic liquid) membranes (PIL) to separate CO2-N2 mixtures [3][4]. N2 is the major component in flue gases. Promising results in regards to permeability and selectivity have been obtained [5]. In order to farther improve the separation performance, some research groups carried out gas permeation tests in which they introduced carbonic anhydrase enzyme into SILMs [6][7][8]. This enzyme catalyzes the hydration reaction of CO2. They showed that the separation is improved due to the facilitated transport provided by the presence of the enzyme. However, these authors only tested only one type of ionic liquid (IL) and only one type of supporting membrane. Much can be still improved by selecting more appropriated IL-support material combinations [9]. In addition, gas permeation requires pressurization of the feed in order to achieve a sufficiently high driving force [5]. Furthermore, CO2 is generally recovered as CO2 gas that would be stored underground. Here, a novel approach in which membrane contactors will be combined with SILM and PIL-IL composite membranes both integrating enzymes will be addressed (see Figure 1). In both cases the enzyme will be dissolved in the IL. In the membrane contactor a receiving liquid phase will have two purposes: recover CO2 in form of a valuable product (produced by the enzyme) and to provide other substrates required for the enzymatic reaction that takes place inside of the membrane. Two enzymes will be tested: carbonic anhydrase and modified RuBisCO. Performing absorption experiments the influence of several parameters (temperature, IL type, enzyme concentration and CO2 partial pressure) in the mass transfer will analyzed (see Figure 2). Results will be modelled using the so called Solution-diffusion model but other models that take into account the reaction inside of the membrane will be applied as well. Finally, the study of membrane stability and economic viability of this solution will be also important topics. References [1] IEA. (2016). OECD/IEA, Paris, France. [2] Merkel, T. et al. (2010). J Memb Sci., 359(1-2), 126-139. [3] Kim, D. H. et al. (2011). J Memb Sci., 372(1-2), 346-354. [4] Li, P. et al. (2012). Green Chem., 14(4), 1052-1063. [5] Luis, P., & Van der Bruggen, B. (2013). Greenhouse Gases: Science and Technology, 3(5), 318-337. [6] Neves, L. A., (2012). Sep. Purif. Technol., 97, 34-41. [7] Bednár, A., (2016). Chem Eng J., 303, 621-626. [8] Abdelrahim, M. Y. M., (2017). J Memb Sci., 528, 225-230. [9] Ramdin, M., (2012). Ind. Eng. Chem. Res., 51(24), 8149-8177.
- Affiliations
Citations
Molina Fernandez, C., & Luis Alconero, P. (2018). Application of enzyme integrated supported ionic liquid membranes and poly(ionic liquid)-free ionic liquid composite membranes in CO2-N2 separation. GEPROC 2018, Liège, Belgium. https://hdl.handle.net/2078.5/125142