動力工廠所排放出含硫量過高之氣體是造成酸雨現象的主要原因。使用變壓吸附法濃縮及回收煙道氣中二氧化硫，使之再利用，為解決問題方法之一。近來這方面的研究已成為處理這類工廠廢氣之首要。 本研究主要利用模擬方式，採用三塔六步驟真空變壓吸附程序，處理進料為0.5﹪SO2，17﹪CO2，其餘為N2之煙道氣，吸附劑採用XAD-16（NO-treated）。模擬時所用的氣體分離機構為平衡模式，假設吸附塔內的同一截面積上固、氣兩相瞬間達成平衡，且為非恆溫之變壓吸附模式，因吸附劑顆粒大，故可忽略吸附塔內壓力降。 此一新程序可將濃度為0.5﹪SO2濃縮至12.54%，回收率達100%;本研究並探討各操作參數(諸如：各個步驟操作時間、進料壓力與沖洗比等等)對程序效能的影響，且利用直交表之實驗計畫法對此製程做模擬結果分析，可由結果得到準確的預測模式，其與模擬結果相比較，準確度約98%。 The major cause for acid-rain phenomena is the emission of SO2 from power plants that burn fossil flues. It is all-important that the recovery and concentration of SO2 from flue gas in solving SO2 problem by pressure swing adsorption. The study is on a three-bed six-step vacuum swing adsorption process using XAD-16 with NO-treated. It was performed simulation for bulk separation of SO2/CO2/N2 (0.5/17/82.5 vol %) system. This study used the equilibrium model and the pressure drop can be neglected. We assumed instantaneous equilibrium between the solid and gas phase with non-isothermal operation. The 0.5%SO2 in the feed could be concentrated to 12.54% in the product with a recovery of 100% by this study. The effects of three operating variables such as adsorption pressure, P/F ratio, steps time were investigated on the performance of this study. The design of experiment was used in analysis of simulation process and could get predictive polynomial function of result. The accuracy of function which descries performance of this study is near to 98%.