• 作者： Wang, Maw-Ling; Hu, Kwan-Hua
• 中文摘要： 本篇論文主要提供一簡易方法用於測定溶質在兩互不相溶異相間之質量傳送係數,溶質之質量傳送速率乃靠具有固定界面面積之 Lewis cell達成。在文中,同時提供一個簡單之模式做為計算之依據,此模式乃依溶質在兩相間之平衡關係及雙膜理論之估計質量傳送速率而建立,利用此種方法以估計質量傳送係數最大之優點在於有效涵蓋範圍甚大之溶質分配係數,而實驗部分乃利用三正辛基胺硫酸鹽做為萃取劑以萃取水相中之酚化合物,由實驗得知,質量傳送係數與二相之界面面積無關,而水中具有較低濃度之酚化合物時,則可獲得較佳之質量傳送係數數值,同時,增加油相中三正辛基胺硫酸鹽濃度也將使質量傳送係數稍為增加。
• 英文摘要： In the present study, a simple method was provided in determining the mass transfer coefficients of solutes between two immiscible phases. A constant interfacial area cell (or Lewis type cell) was used as the apparatus for measuring the mass transfer rates of solute. A simple model, which included the equilibrium of solute between two phases and the two-film theory to account for the rate of mass transfer across the interface, was derived. The greatest advantage in using this method to estimate the mass transfer coefficients of substances is its validity for covering a wide range of distribution coefficients of solutes. Experimental work, in which phenol was extracted from the aqueous phase with sulfuric acid salt of trioctylamine,.lbrak.(TOA)/sub 2/S.rbrak., was conducted to get the mass transfer coefficients. The obtained mass transfer coefficient is independent of the interfacial area between two phases. A lower initial concentration of phenol in the aqueous phase will provide a higher value of the mass transfer coefficient. Increasing the concentration of(TOA)/sub 2/S will lead to a slight increase in the mass transfer coefficient.
• 中文關鍵字： 質傳係數; 萃取速率; 界面面積; 酚; 雙膜理論
• 英文關鍵字： Mass Transfer Coefficient; Extraction Rate; Interfacial Area; Phenol; Two-Film Theory