The characteristic and performance of CO2 electrolyzer via Eular-Eular method
In order to study the characteristics of water-gas transport during the electrolytic reduction of carbon dioxide,a computational model for the coupling of multiphase mass transfer process and electrochemistry in a carbon dioxide electrolytic cell is developed based on the Euler-Euler method.The carbon dioxide electrolytic cell is set up as the experimental test platform,and the numerical model is verified based on the experimental data.On this basis,the working characteristics of the electrolytic cell are simulated and analyzed based on the single channel model and the large size single snake flow field model.It is found that the faster water flow speed can accelerate the discharge of the generated gas,which is conducive to the reaction.In the large-size flow field,due to the water not being discharged in time,a considerable amount of water is transferred to the cathode side through the proton exchange membrane,resulting in the occurrence of cathode flooding.The reduction of liquid water content on the cathode side can improve the gas transmission condition on the cathode side to a certain extent.Therefore,it is necessary to reasonably design the flow field structure and the water supply and gas supply strategy to avoid excessive water in the cathode.
CO2electrolytic cellexperimentnumerical simulationsingle channel modelsingle snake flow field model
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