• 作者： Kuo, Sheng-Lung; Shih, Yen-Sheng
• 中文摘要： 硫離子之電化學反應,氧化成硫磺,附著在陽極上,造成電極之鈍化,然有機溶劑連續地對陽極行萃取效果,使反應得以持續進行,且到 80%以上之總電流效率(.eta./sub 0/),但能源效率仍低。本文利用硫磺在陽極之平均覆蓋率(.theta.)為電化學反應及萃取反應相互平衡之指標,同時定義萃取比(.tau.)為萃取時間相對於電化學時間之比值,來當作萃取操作方式之參考指標,利用一半批次反應器,經由連續式操作(. tau.=1)及週期式(0<.tau.<1)之動力分析,在穩定操作下,總電流效率(.eta./sub 0/)可達89%,同時利用週期式操作之能源效率,高出連續式操作之能源效率達30倍以上。
• 英文摘要： The extractive electrochemical conversion of sulfide ion to sulfur was proved to be feasible. In previous research, the overall efficiency (.eta./sub 0/) was enhanced to be over 80% by spraying continuously the organic solvent on the anode surface. This paper presents the average surface coverage ratio of sulfur on the anode (.thetabar.) as an index on competition between the electrochemical reaction and the extraction. Meanwhile, extractive-duty ratio (.tau.), defined to be the time ratio of extraction with electrochemical reaction, is introduced as an index of operation mode. A kinetic model is developed for a semi-batch reactor under continuous (.tau.=1) and periodic operation (1>.tau.>0). In the steady-state operation, the optimal overall efficiency (.eta./sub 0/) was found to be as high as 89% under the electrolysis conditions of .tau.=0.23 and .thetabar.=0.55. Meanwhile, the energy efficiency(.eta./sub 0/) was substantially enhanced by periodic mode to be more than 30 times compared with the continuous operation.
• 中文關鍵字： 硫化物氧化; 硫回收; 萃取反應器; 萃取; 電化學反應
• 英文關鍵字： Sulfide Oxidation; Sulfur Recovery; Extractive Reactor; Extraction; Electrochemical Reaction