CO2 capture: an approach based on membrane technology
(2015) Network Young Membrains 2015 — Location: Aachen, Germany (4.September.2015)
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- The concentration of atmospheric carbon dioxide (CO2) in the atmosphere has increased significantly from about 280 ppm in 1750 (pre-industrial era) to 367 ppm in 1999 [1] and to 379 ppm in 2005 [2]. Membrane research focused on CO2 capture started around 1990 and since then, great advances have been obtained: higher mass transfer coefficients, new materials for membrane synthesis, integration of membrane-based technology, etc.[3]. In this project, membrane technology is presented as the cornerstone for CO2 capture with a double purpose. First, as a novel strategy to minimize energy and material consumption due to the intrinsic advantages of membrane processes and the use of NaCl as the only material source in the process; and secondly, the integration of different membrane systems (i.e., membrane-based absorption, membrane crystallization, membrane distillation, nanofiltration and bipolar electrodyalisis) allows the design of an overall process that leads to the recovery and further reuse of the CO2 captured as a carbonated compound (i.e., Na2CO3). Thus, a revolutionary approach for CO2 capture from flue gases and sequestration in a potential reusable material is presented. In addition, the obtained Na2CO3 can be reused in the industry (e.g., cement and ceramic industry), which will have an impact on the conventional production of Na2CO3 via the Solvay process, due to: i) ammonia (NH3) is not required, which is an essential reagent in the conventional process; ii) conversion of CaCO3 to produce CO2 (reagent in the Solvay process) is not needed since CO2 is obtained from flue gases; iii) HCl can be obtained as sub-product instead of CaCl2, which is a low value compound produced by the conventional process.
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Ruiz Salmon, I., & Luis Alconero, P. (2015). CO2 capture: an approach based on membrane technology. Network Young Membrains 2015, Aachen, Germany. https://hdl.handle.net/2078.5/36628