在旋轉填充床中氣提蔗糖水溶液中溶氧之研究

Abstract

程序強化(process intensification)或許會成為新的化學工業範例，而旋轉填充床為程序強化的重要項目之一，其是透過旋轉產生離心力取代地球重力場強化氣液間分離、混合與反應的程序，達到提昇質傳與提高效率達千倍、百倍的效果，使設備體積得以大幅度縮小，可以廣泛運用在化工分離、能源、環保等領域，減省設備成本及能源耗損。

在食品工業中，飲料用水溶液對於溶氧一樣有著嚴格的要求，低溶氧量可以減少水溶液中細菌的繁殖與幫助二氧化碳溶解等效益，故本實驗利用旋轉填充床能明顯提昇質傳效果的特性，使用氮氣氣提移除蔗糖水中的溶氧，實驗變數包含轉速、液體流量與液體濃度、氣體流量，同時亦分析液膜體積質傳係數。

As a novel chemical process equipment, rotating packed bed (RPB) can greatly intensify mass transfer. RPB enhances mass transfer by high centrifugal field instead of gravity, which has been substantially applied in chemical separation, energy and environmental protection. Compared with the traditional mass transfer equipment, it has many remarkable advantages especially the high efficiency. This research mainly investigated the stripping of oxygen in sucrose solution in a RPB. Various factors affect dissolved oxygen (DO) and overall volumetric mass transfer coefficient(KLa) were investigated, such as rotating speed, gas flow rate, liquid flow rate and sucrose concentration.