摘 要 溫室效應已對全球氣候造成重大的變遷。因此，如何回收工廠所排放出來的二氧化碳將是解決二氧化碳問題的首要步驟。 本研究是由模擬方式進行三塔式變壓吸附程序的探討。進料為16％CO2和84％N2的混合氣體，吸附劑採用13X沸石，氣體吸附量採Langmuir平衡吸附式，分離機構為平衡模式，忽略吸附塔內的壓降，考慮非恆溫的變壓吸附程序。 以模擬程式探討不同操作參數對產物濃度與回收率的影響，濃縮後的CO2純度可達73％（此時回收率為77％），回收率可達87％（此時純度為70％），並考慮所做的功來計算「實際回收率」，此實際回收率的值會比原本的回收率減少2?5％左右，再利用實驗設計方法找出影響濃度與回收率的重要參數，並建立預測方程式，預測的結果平均誤差約5?8％。 Abstract The global climate is greatly changed by greenhouse effect. The recovery of CO2 from flue gas is the first important step in solving CO2 problem. The three-bed pressure swing adsorption (PSA) processes were explored by simulation in this study. The feed gas contains 20% CO2 and 80% N2. The adsorbent is zeolite 13X. The amount of adsorption is calculated by Langmuir isotherm, and this study used the equilibrium model without the consideration of pressure drop. It is also considered non-isothermal operation. The simulation program has studied the influence of operation parameters. The higher purity of the concentrate CO2 is 73％ (the recovery is 77％), and the higher recovery is 87％ (the purity is 70％).It is also considered the work of the process to calculate the “actual recovery”. The values of the actual recovery reduce about 2?5％ from recovery. The important parameters that affect the purities and recoveries were found by the method of experiment design, and we found the polynomials to predict the results. The average errors of the polynomials are about 5?8％.