{"title":"预测平行板电化学反应器中气泡诱导对流强化传质的两相模型","authors":"A.N. Colli, J.M. Bisang","doi":"10.1016/j.electacta.2024.144606","DOIUrl":null,"url":null,"abstract":"<div><p>This study introduces a two-phase model (Euler-Euler) designed to predict mass transfer enhancement resulting from electro-generated bubbles under varying conditions. Considering parameters such as bubble size, current density, turbulence, and fluid properties, the model aims to provide a comprehensive understanding of the relationship between bubble dynamics and mass transfer enhancement. The methodology for constructing the model, the incorporation of empirical correlations for bubble-liquid interactions, the validation against experimental data, and a sensitivity analysis are discussed. The model proves valuable in simulating mass transfer behaviour under bubble-induced convection, allowing for the straightforward exploration of the effects of different parameters. It is inferred that the exponent in the Schmidt (Sc) number in correlations for gas-evolving electrodes should be 0.5. Incorporating two dimensionless numbers, Reynolds (Re<sub>g</sub>) and Galileo (Ga), in a correlation is essential to fitting experimental results, accounting for the hydrodynamics of the two-phase system. Finally, the model facilitates the prediction of cell voltage during galvanostatic operations and the total current for a fixed cell potential difference. This capability enables the calculation of figures of merit, such as space time yield and specific energy consumption, offering practical insights for engineering scale-up and optimization.</p></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":5.5000,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A two-phase model to predict the enhanced mass transfer by bubble-induced convection in parallel-plate electrochemical reactors\",\"authors\":\"A.N. Colli, J.M. Bisang\",\"doi\":\"10.1016/j.electacta.2024.144606\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study introduces a two-phase model (Euler-Euler) designed to predict mass transfer enhancement resulting from electro-generated bubbles under varying conditions. Considering parameters such as bubble size, current density, turbulence, and fluid properties, the model aims to provide a comprehensive understanding of the relationship between bubble dynamics and mass transfer enhancement. The methodology for constructing the model, the incorporation of empirical correlations for bubble-liquid interactions, the validation against experimental data, and a sensitivity analysis are discussed. The model proves valuable in simulating mass transfer behaviour under bubble-induced convection, allowing for the straightforward exploration of the effects of different parameters. It is inferred that the exponent in the Schmidt (Sc) number in correlations for gas-evolving electrodes should be 0.5. Incorporating two dimensionless numbers, Reynolds (Re<sub>g</sub>) and Galileo (Ga), in a correlation is essential to fitting experimental results, accounting for the hydrodynamics of the two-phase system. Finally, the model facilitates the prediction of cell voltage during galvanostatic operations and the total current for a fixed cell potential difference. This capability enables the calculation of figures of merit, such as space time yield and specific energy consumption, offering practical insights for engineering scale-up and optimization.</p></div>\",\"PeriodicalId\":305,\"journal\":{\"name\":\"Electrochimica Acta\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2024-06-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochimica Acta\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0013468624008466\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochimica Acta","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0013468624008466","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
A two-phase model to predict the enhanced mass transfer by bubble-induced convection in parallel-plate electrochemical reactors
This study introduces a two-phase model (Euler-Euler) designed to predict mass transfer enhancement resulting from electro-generated bubbles under varying conditions. Considering parameters such as bubble size, current density, turbulence, and fluid properties, the model aims to provide a comprehensive understanding of the relationship between bubble dynamics and mass transfer enhancement. The methodology for constructing the model, the incorporation of empirical correlations for bubble-liquid interactions, the validation against experimental data, and a sensitivity analysis are discussed. The model proves valuable in simulating mass transfer behaviour under bubble-induced convection, allowing for the straightforward exploration of the effects of different parameters. It is inferred that the exponent in the Schmidt (Sc) number in correlations for gas-evolving electrodes should be 0.5. Incorporating two dimensionless numbers, Reynolds (Reg) and Galileo (Ga), in a correlation is essential to fitting experimental results, accounting for the hydrodynamics of the two-phase system. Finally, the model facilitates the prediction of cell voltage during galvanostatic operations and the total current for a fixed cell potential difference. This capability enables the calculation of figures of merit, such as space time yield and specific energy consumption, offering practical insights for engineering scale-up and optimization.
期刊介绍:
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.