Taqieddin Amir, Allshouse Michael R, Alshawabkeh Akram N
Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA.
Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, USA.
J Electrochem Soc. 2018;165(13):E694-E711. doi: 10.1149/2.0791813jes. Epub 2018 Oct 10.
Electrochemically gas-evolving systems are utilized in alkaline water electrolysis, hydrogen production, and many other applications. To design and optimize these systems, high-fidelity models must account for electron-transfer, chemical reactions, thermodynamics, electrode porosity, and hydrodynamics as well as the interconnectedness of these phenomena. Further complicating these models is the production and presence of bubbles. Bubble nucleation naturally occurs due to the chemical reactions and impacts the reaction rate. Modeling bubble growth requires an accurate accounting of interfacial mass transfer. When the bubble becomes large, detachment occurs and the system is modeled as a two-phase flow where the bubbles can then impact material transport in the bulk. In this paper, we review the governing mathematical models of the physicochemical life cycle of a bubble in an electrolytic medium from a multiscale, multiphysics viewpoint. For each phase of the bubble life cycle, the prevailing mathematical formulations are reviewed and compared with particular attention paid to physicochemical processes and the impact the bubble. Through the review of a broad range of models, we provide a compilation of the current state of bubble modeling in electrochemically gas-evolving systems.
电化学析气系统应用于碱性水电解、制氢及许多其他领域。为了设计和优化这些系统，高保真模型必须考虑电子转移、化学反应、热力学、电极孔隙率、流体动力学以及这些现象之间的相互联系。而气泡的产生和存在使这些模型更加复杂。由于化学反应，气泡成核自然发生，并影响反应速率。模拟气泡生长需要精确考虑界面传质。当气泡变大时，就会发生脱离，此时系统被建模为两相流，气泡会影响主体中的物质传输。在本文中，我们从多尺度、多物理场的角度回顾了电解介质中气泡物理化学生命周期的主导数学模型。对于气泡生命周期的每个阶段，我们回顾并比较了主流的数学公式，特别关注物理化学过程以及气泡的影响。通过对广泛模型的回顾，我们汇总了电化学析气系统中气泡建模的当前状态。
Zotero 插件
