臺灣博碩士論文加值系統

本論文主要目的在於研究旋轉填充床中，外殼對液膜體積質傳係數的影響。實驗中以氮氣氣提水中溶氧為實驗系統，比較液膜體積質傳係數(kLa)大小以得知質傳效率的優劣。實驗的部份改變氣量、液量、轉速、外殼半徑及填充床分別進行探討。
經由實驗結果發現，在同一填充床下，液膜體積質傳係數隨液量及轉速上昇而上昇，與氣量無關。外殼對質傳有不同的影響程度，大致上可看出填充物越少的填充床，外殼的影響越大。這暗示填充床越小，外部端效應越大。且液膜體積質傳係數隨填充床體積減少而上昇，這項特性可於Chen et al.(2005)觀察到。

This study examined the mass transfer of rotating packed bed (RPB) with various radii of the stationary housing. The volumetric liquid-side mass transfer coefficients (kLa) were obtained using stripping of oxygen from water by nitrogen under various operating conditions including gas flow rate, liquid flow rate, rotor speed, inner and outer radii of packed bed.
According to the experimental results, the kLa values appeared to increase with an increasing liquid flow rate and rotor speed but be independent of the gas flow rate. Also, it was found that the effect of stationary housing on the mass transfer rotating packed bed was larger as the volume of packed bed was reduced. This implied that the outer end effect was significant for the smaller size of RPB. Moreover, it was noted that the kLa values increased with a decreasing volume of packed bed. This characteristic was also observed in the previous work presented by Chen et al. (2005). A correlation taking end effects into consideration was obtained to predict the liquid-side mass transfer coefficient.

中文摘要 I
英文摘要 II
目錄 III
表目錄 V
圖目錄 VII
第一章 緒論 - 1 -
1-1 序言 - 1 -
1-2 研究方向 - 1 -
第二章 文獻回顧 - 2 -
2-1 旋轉填充床簡介 - 2 -
2-1 旋轉填充床液膜質傳係數 - 7 -
第三章 實驗設備與研究方法 - 21 -
3-1 實驗設備 - 21 -
3-2 實驗方法 - 27 -
第四章 結果與討論 - 29 -
4-1 不同操作條件對質傳的影響 - 29 -
4-1-1 氣量對質傳的影響 - 29 -
4-1-2 液量對質傳的影響 - 34 -
4-1-3 轉速對質傳的影響 - 40 -
4-2 外殼半徑對質傳的影響 - 46 -
4-2-1 RPB-1之結果 - 46 -
4-2-2 RPB-2之結果 - 52 -
4-2-3 RPB-3之結果 - 56 -
4-3 填充床內外徑對質傳的影響 - 60 -
4-3-1 固定內徑，改變外徑 - 60 -
4-3-2 固定外徑，改變內徑 - 61 -
4-4 液膜質傳係數經驗式討論 - 75 -
4-4-1 陳經驗式與質傳係數實驗値之比較 - 75 -
4-4-2 經驗式討論 - 75 -
第五章 結論 - 79 -
參考資料 - 81 -
附錄A 校正曲線圖 - 86 -
附錄B 液膜體積質傳係數實驗數據 - 88 -

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陳昱劭,旋轉填充床中黏度對質傳影響之研究,台灣大學化學工程研究所博士論文(2004)