발간논문

Home > KJMM 논문 > 발간논문

Vol.20, No.9, 747 ~ 752, 1982
Title
Kinetics on the Reduction of Eu (3) with Zinc
이응조Eung Cho Lee, 김홍래Hong Lae Kim
Abstract
The rate of reduction of Eu(III) ions with zinc under an inert atmosphere was investigated by use of a rotating disc geometry. Among the rate controlling steps of this heterogeneous reaction, diffusion of Eu(III) onto the zinc rotating disc surface through the solution is explained by using the well-known Levich equation, k＝0.62 D^(⅔) ν^(-1/16) ω^(½). For temperatures above 20℃, the rate of reduction is limited by the rate at which Eu(III) ions in the solution diffuse onto the zinc surface and the activation energy of this mass transfer-controlled reaction is 3.4 ㎉/㏖. For temperatures below 20℃, the rate of reduction decreased rapidly and hence a change in the rate controlling step would be occurred.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.