کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
661628 1458168 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical reaction with RedOx electrolyte in toroidal conduits in the presence of natural convection
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Electrochemical reaction with RedOx electrolyte in toroidal conduits in the presence of natural convection
چکیده انگلیسی

Transport processes in an upright, concentric, annular, electrochemical reactor filled with RedOx electrolyte solution are studied experimentally and theoretically. The electrodes form the two vertical surfaces of the reactor. The theoretical calculations consist of the solution of the Navier–Stokes and the Nernst–Planck equations accounting for species’ diffusion, migration, convection, and electrochemical reactions on the electrodes’ surfaces as a function of the difference in electrodes’ potentials and the average concentration of the electrolyte. Since the convection is driven by density gradients, the momentum and mass transport equations are coupled. The current transmitted through the electrolyte is significantly enhanced by natural convection. The current is measured as a function of the difference in the electrodes’ potentials. To obtain the reaction rate constants, an inverse problem is solved and the reaction rate constants are determined by minimizing the discrepancy between theoretical predictions and experimental observations. As an example, we study the reversible electrochemical reaction Fe+++ + e− = Fe++ on platinum electrodes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 21–22, October 2006, Pages 3968–3976
نویسندگان
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