氧氣濃縮機藉由電力運作，提供高純度的氧氣給長期需要氧氣維生的居家病患使用。濃縮機發展至今已有十到十五年，藉由變壓吸附的原理來提供高純度的氧氣。此原理是利用壓力的變化來進行分離，已普遍的應用在分離空氣的氧氣。 本研究主要利用模擬方式，採用雙塔六步驟變壓吸附程序，處理進料為78.3%N2、20.762﹪O2與0.938%Ar， 程序吸附劑採用OXYSIV-5XP。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。 此一程序可將濃度為20.762﹪O2之空氣濃縮至92%，回收率31%，本研究並探討各操作參數(諸如：塔長、吸附壓力、環境溫度、各個步驟操作時間)對程序效能的影響，此外針對小型化濃縮機尋找最佳化條件。 Oxygen concentrators are electrically powered devices which are designed to provide oxygen for patient who require long-term oxygen supply at home. The machine has been available for the last 10 to 15 years. It produces high oxygen concentration by pressure swing adsorption (PSA) process. The process uses variation of pressure as the main operating parameter to achieve separation and is becoming increasingly popular for the production of oxygen from air. This study uses a two-bed six-step process. Simulation is performed for the bulk separation of N2/O2/Ar(78.3/20.762/0.938 vol %) feed. The process utilizes OXYSIV-5XP as adsorbent. This study uses 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 20.762%O2 in the feed can be concentrated to 92%O2 in the product with a recovery of 31%. The effects of operating variables such as bed length, adsorption pressure, surrounding temperature, and steps time are investigated on the performance of this study. In addition we aim at small-scale concentrator and seek for to optimal operation.