• 作者： Chou, Cheng-Tung; Huang, Wen-Chun; Chiang, Anthony S.T.
• 中文摘要： 對壓變式吸附程序而言,陡峭之濃度波有助於氣體混合物之分離,但不易模擬。本研究係利用含三次多項式估計函數之直線法模擬會形成陡峭濃度波的5A沸石分離空氣系統之貫流曲線及非恆溫壓變吸附程序,並在二次空間微分估計值過大之區域,插入額外節點以確保在濃度波附近有足夠多的節點。在模擬程序中,並利用DDS/2軟體的LSODE程式對時間作積分。所得結果與實驗數據比較顯示此數值方法可合理地模擬非線性等溫線之壓變式吸附系統。
• 英文摘要： For pressure swing adsorption (PSA) processes, the sharp concentration wavefront is beneficial to the separation of gas mixtures, yet such a phenomenon is difficult to simulate. In this study, a method of lines with cubic spline approximating fuctions is used to simulate breakthrough curves and a nonisothermal PSA process with 5A zeolite for separating air, which can bring up a sharp concentration wavefront. In the region the estimated value of the second spatial derivative of approximating function becomes large, extra grid points will be specified to insure enough grid points around concentration wavefront. This method is combined with the integration program LSODE of DSS/2 package in this study. The simulation is compared with experimental data. The results show that this method can reasonably simulate such a PSA system with nonlinear isotherm.
• 中文關鍵字： 壓變式吸附; 5A沸石; 非等溫; 空氣分離; 貫流曲線
• 英文關鍵字： Pressure Swing Adsorption; 5A Zeolite; Nonisothermal; Air Separation; Breakthrough Curve