頁籤選單縮合
題名 | Effective Isotherms and Equilibrium Characteristics of a Weak Acidic Cation Resin=弱酸性陽離子交換樹脂之有效等溫線及平衡特徵 |
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作者 | 莊亨立; Tan, Henry K. S.; |
期刊 | Journal of the Chinese Institute of Chemical Engineers |
出版日期 | 20010700 |
卷期 | 32:4 2001.07[民90.07] |
頁次 | 頁383-389 |
分類號 | 460.02 |
語文 | eng |
關鍵詞 | 弱酸性陽離子交換樹脂; Ion exchange; Weak acidic resin; Equilibrium theory; |
中文摘要 | 本文以理論及實驗探討弱酸性陽離子交換樹脂之平衡性質。由樹脂官能基分離常數及交換糸統之選擇係數導出此類樹脂之有效等溫線。導出之程式可用於氫離子與任何原子價之金屬離子的交換。以平衡理論為基礎及利用有效等溫線程式導出貫穿曲線。實驗作業係用一弱酸性陽離子樹脂,IRC-50。樹脂床實驗使用0.05至0.1N的NaCl及CaN□溶液。實驗所得□-□及C□-□交換糸統的貫穿曲線顯示貫穿很快就出現而且操作容量只有最終交換容量的2至3%。比較理論及實驗貫穿曲線顯示樹脂之規格化分離常數在0.001至0.003之間,而N□-□及□-□交換糸統之規格化選擇係數應在0.2至0.5之間。 |
英文摘要 | The equilibrium properties of a weak acidic cation resin were studied theoretically and experimentally. Equations were derived for the effective isotherm of this type of resin. The derived equations are applicable to the exchange of hydrogen ions with any metallic ions with a valence of n. based on equilibrium theory, theoretical breakthrough curves were derived from the effective isotherm expressions. Experiments were performed using IRC-50, a weak cationic resin. Column runs were conducted with 0.05 to 0.1Jn of both NaCl and Ca(N□)□ solutions. The experimental breakthrough curves obtained for both N□-□ and C□□ exchange show that the breakthrough occurs very early and that the operating capacity is only 2-3% of the ultimate capacity of the resin. Comparing the theoretical breakthrough curves with the experimental one suggests that the value of the normalized dissociation constant is between 0.001 and 0.003, and that for both the N□-□ and C□-□ exchange systems, the normalized selectivity coefficient is between 0.2 and 0.5. |
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