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Mass Transfer Enhancement Using Extensions as Turbulence Promoters

Q.J.M. Slaiman قاسم جبار --- Buraq S. Ahmed براق شهاب

Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط
ISSN: 19974884/E26180707 Year: 2013 Volume: 14 Issue: 4 Pages: 1-10
Publisher: Baghdad University جامعة بغداد

Abstract

Mass transfer was studied using a rotating cylinder electrode with different lengths of legs acting as turbulence promoters. Two types of rotating cylinder ,made of brass, were examined : an enhanced cylinder one, with four rectangular extensions 10 mm long, 10 mm wide, and 1mm thick, and an enhanced cylinder two with four longitudes 30 mm long,10 mm wide, and 1mm thick. The best performance was obtained for enhanced cylinder two at low rotation speeds while enhanced cylinder one was realized at high rotation speeds. The mass transfer enhancement as compared with a normal rotating cylinder electrode, devoid of promoters, is 53% or 58% higher. The enhancement percentage decreased as rotation speeds increased further, since, seemingly, full turbulence has been reached practically by means of rotation and turbulence promoters.

Keywords

electrochemical reactors --- mass transfer --- rotating cylinder electrode --- limit current --- turbulence promoter.