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題名 | The Effect of Accumulation of Cathodic Decomposition on the Anodic Conversion of Sulfide Ions to Sulfur in a Continuous Extractive Electrochemical Reactor=陰極反應產物累積對萃取式硫離子電化學氧化系統效率之影響 |
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作者 | 郭貹隆; 施顏祥; | 書刊名 | 中國工程學刊 |
卷期 | 14:1 1991.01[民80.01] |
頁次 | 頁117-123 |
分類號 | 341.37 |
關鍵詞 | 反應產物; 氧化系統; 硫離子; 累積; 陰極; 萃取式; 電化學; |
語文 | 英文(English) |
中文摘要 | 硫離子萃取電化學反應,當有機溶劑循環地有效萃取出陽極上硫磺時,連繼地補 充高濃度之硫離子入半批次反應器中,則可保持系統之反應速率,且可用總電流效率(η�� )為系統之參考指標。 經由理論分析,該系統在長期操作下,因陽極上之吸附硫磺,受電解質中不可移去的氫氧根 離子 OH �狺峖h硫離子 Sx �滋狺坐ずЙ遘恁A造成總電流效率(η�諢^隨反應時間之進行而 下降,而部分氫氧根離子,係由系統中陰極之水電解反應,產生出之氫氧根離子累積而成, 使電解質濃度上升,加速了總電流效率(η�諢^之下降。 本文在長期操作中,經由小心的保持電解質濃度,降低硫磺產物之化學溶解量,則可以改進 總電流效率(η�諢^之下降速率達 15 %左右,使該系統更適合於應用之操作。 |
英文摘要 | The continuous and direct conversion of sulfide ions to sulfur using an extractive electrochemical method was studied. A concentrated sulfide ion solution was continuously supplied into a semi-batch reactor to keep the reaction rate stable. The overall efficiency (η�� ) was used as an index for this conversion. Theoretical analysis indicates that the decay of the overall efficiency (η�� ) is inevitable due to the chemical dissolution of the adherent sulfur by the unremovable hydroxide ions and polysulfide ions in the alkaline electrolysis solution under long-term operation. The concentration of hydroxide ions increases as a result of the cathodic decomposition of water. The polysulfide ions are produced from the combination of adherent sulfur and hydroxide ions. However, the decaying rate of the overall efficiency (η�� ) was improved experimentally to be more than 15% by carefully regulating the electrolyte concentration under long-term operation. This paper reports on two key factors in controlling the decaying rate such that it is within an acceptable range for industrial operation:feeding interval (�晻n ) and feeding concentration (�� C). |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。