- 作者: 李九龍 ; 施顏祥
- 作者服務機構: 台灣工業技術學院化學工程技術系
- 中文摘要: The mass-transfer characteristics of a two-phase system formed by mixing a fixed quantity (20v/v%) of organic solvent with an aqueous ferricyanide electrolyte solution in an RDE system were studied. The Levich equation, I/sub 1/= 0.62nFAC/sub b/D/sup (2/3)/.nu./sup (-1/6)/.omega./sup (1/2)/, was found to be applicable to the two-phase system with only a minor modification in the angular velocity(.omega.) at Reynolds numbers between 3-5*10/sup 4/. The experimental results indicate that the interfacial tension is the most important variable for the two-phase system. One group of organic solvents with smaller interfacial tension, such as benzene or toluene, meeds a modification of the Levich equation by replacing the observed angular velocity(.omega./sub o/) with the true angular velocity(.omega./sub t/) which was observed to be 1.1 times the observed angular velocity. For the other group with larger interfacial tension, such as n-hexane or cyclohexane, there is no need to modify the observed angular velocity. In other words, the Levich equation may be expressed as I/sub 1/= 0.65nFAC/sub b/D/sup (2/3)/.nu./sup (-1/6)/.omega./sup (1/2)/ for two-phase solution if the interfacial tension is smaller than 37.0 dyne/cm.
- 英文摘要: --
- 中文關鍵字: Two-Phase Electrochemical System; Levich Equation; Rotating Disk Electrode
- 英文關鍵字: 二相電化學系統;Levich方程式;旋轉盤電極