汽油為汽車不可或缺之燃料，而將無水酒精摻入汽油中製成汽油酒精作為車用取代燃料已被廣泛利用。其中無水酒精為將生質材經醣解作用發酵生成生質酒精製得，但由於生質酒精皆含大量水分，雖經蒸餾可製得95.6wt% 酒精及4.4wt% 水的共沸物。因此將此酒精-水共沸物再脫水製成無水酒精實為重要。而傳統利用共沸或萃取蒸餾製得無水酒精為一種耗能程序，而吸附分離為一種較節能程序，因此已被廣泛注意將其應用於酒精脫水。本研究擬以實驗方式找尋最佳的酒精脫水吸附劑，並找出最佳吸附劑之吸附曲線。將此結果用數值模擬的方式探討其酒精-水蒸氣之吸附貫流行為及效能。此外並將此數學模式延伸發展酒精-水蒸氣變壓吸附分離程序，進而利用我們的模擬程式發展實用性之變壓吸附程序。 ; Liquid fuels are indispensable to automobiles. Anhydrous ethanol blended into gasoline, which is called gasohol, is one of the most studied renewable alternates and is widely used as motor car fuel in Brazil and USA. The anhydrous ethanol is made from bio-ethanol which is fermented from biomass by hydrolysis. However, the ethanol from fermentation typically contains a lot of water. Although the traditional distillation can obtain 95.6wt% ethanol and 4.4wt% water, which forms an azeotrope at 78.15℃ and 1.013 bar. To obtain anhydrous ethanol from the azeotrope is an important technology. Traditional azeotropic distillation and extractive distillation to obtain anhydrous ethanol need a lot of energy. Adsorption as a low energy consumption process has attracted attention to apply in ethanol dehydration. This study plans to find a suitable adsorbent and to obtain the isotherm of ethanol and water adsorption by adsorption equilibrium experiment. Then this study intends to apply the isotherm and to develop a numerical model to analyze the effect of variables such as flow rate, length, inlet temperature, etc. to find its breakthrough performance. In the second year, the model is extended to simulate pressure swing adsorption process for dehydration of ethanol, which is to be analyzed for defined purity and recovery. The aim of our study is to develop a practicable pressure swing adsorption process for ethanol dehydration. ; 研究期間 9708 ~ 9807
