کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10269177 | 459718 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the gas-evolution efficiency of electrodes. II - Numerical analysis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Applying the model equations shows that the gas-evolution efficiency is significantly smaller than unity in the total range of current density applied in laboratory as well as in nearly all industrial reactors. The impact of the bubble coverage as observed from experimental data is confirmed. Moreover, mass transfer of dissolved gas from the electrode to liquid bulk has decisive influence. The over-all mass transfer rate results from the combined action of several competing mass transfer mechanisms. At low values of the current density, free convective mass transfer mechanisms of various origins dominate. In this case, the electrode height is an important parameter explaining the enormous scatter of experimental data. The dominating impact steadily shifts to microconvective mass transfer as the current density is increased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 56, Issue 5, 1 February 2011, Pages 2404-2410
Journal: Electrochimica Acta - Volume 56, Issue 5, 1 February 2011, Pages 2404-2410
نویسندگان
H. Vogt,