Jung, B. Park, S. Lim, C. Lee, W.H. Lim, Y. Na, J. Lee, C.-J. Oh, H.-S. Lee, U. 2024-01-19T13:30:47Z 2024-01-19T13:30:47Z 2021-09-02 2021-11 1385-8947 https://pubs.kist.re.kr/handle/201004/116136 The electrochemical conversion of CO2 using a continuous flow membrane reactor is a promising technology. This is because the membrane reactor can achieve high productivity and selectivity by enhancing the mass transfer of CO2. In an industrial-scale reactor, the extrinsic properties that facilitate the mass transfer rate are crucial because the uniform flow distribution and high production rate can only be achieved when the interface and flow patterns are properly designed. Herein, we experimentally measured the production rate of CO in a large-scale electrochemical CO2 reduction reactor by varying the pH, interface, and flow pattern. The result indicated that optimization of the flow pattern alone can improve the production rate of CO by 28% indicating that a high convection rate through gas diffusion electrode (GDE) results in a high production rate. A three-dimensional computational fluid dynamic model was developed to quantify the effect of the new flow pattern on the mass transfer. From the model, the Peclet number increased by 28%, which is consistent with the CO partial current increment. This result indicates that the convective mass transfer improves the production rate. Additionally, we proposed a general guideline for the flow pattern design for a large-scale electrochemical CO2 reduction reactor that maximizes convective mass transfer through a GDE. ？ 2021 English Elsevier B.V. Design methodology for mass transfer-enhanced large-scale electrochemical reactor for CO2 reduction Article 10.1016/j.cej.2021.130265 1 Chemical Engineering Journal, v.424 Chemical Engineering Journal 424 N scie scopus 000707037200012 2-s2.0-85106245291 Engineering, Environmental Engineering, Chemical Engineering Article Bioreactors Computational fluid dynamics Diffusion in gases Electrolytic cells Flow patterns Phase interfaces Reduction CO$-2$/ reduction Convective mass transfer Design Methodology Electrochemicals Electrolyzers Gas diffusion electrodes High production rate Large-scales Membrane reactor Carbon dioxide CFD CO2 reduction Electrolyzer Mass transfer