کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6591267 | 456869 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of ultrasound on mass transfer during electrodeposition for electrodes separated by a narrow gap
ترجمه فارسی عنوان
اثر اولتراسوند بر روی انتقال جرم در طی الکترواستاتیک برای الکترودهای جدا شده توسط یک شکاف باریک
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
This work reports an investigation on mass transfer by ultrasound agitation during electrodeposition on electrodes separated by a narrow inter-electrode gap. Polarisation experiments were performed to identify the mass transfer limiting current. The limiting current density was used to calculate mass transfer boundary layer thicknesses which were used to develop mass transfer correlations. Experiments were carried out using a cell with parallel copper discs which were positioned at gaps of 1, 0.5 and 0.15Â cm. The distance between the ultrasonic probe and electrodes was varied between 3 and 1.5Â cm. The polarisation data showed clear limiting current plateaux when the distance between the electrodes was larger, however significant distortions were observed when the gap was 0.15Â cm. It was found that lower ultrasound powers of 9-18Â W/cm2 provided more effective agitation at narrower electrode gaps than powers exceeding 18Â W/cm2. Sherwood correlations showed that in this system, developing turbulence occurs for larger inter-electrode spacing, whereas for narrow electrode gaps fully turbulent correlations were obtained. A 2-D current distribution model showed that potential distortions that were observed in the polarisation data were caused by the close placement of the metallic US probe to the two parallel electrodes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 113, 3 July 2014, Pages 35-44
Journal: Chemical Engineering Science - Volume 113, 3 July 2014, Pages 35-44
نویسندگان
S. Coleman, S. Roy,