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The effect of desorption pressure on CO2 /N 2 breakthrough behaviors for 4 different adsorbents was studied at a fixed bed. Zeolite 3A, 4A, 5A, and 13X pellets were used as adsorbents. Cyclic operations were executed with varying desorption pressure from vacuum (0 bar) to 3 bar while other conditions such as adsorption step pressure (3 bar), temperature (293 K), composition (CO2 :N 2 = 10 : 90 vol%) and flow rate (400 ccm) were fixed at constant values. Each adsorption and desorption step was set as 80 min, which totaled up to 160 min per a cycle. 5 cycles with adsorption and desorption steps were run overall. After the experiment, breakthrough time, saturation time, and adsorption amount were measured and compared in order to find an optimum adsorbent and a proper operating condition for a post combustion CO2 capture process.

Effect of Desorption Pressure on Adsorption and Desorprtion Breakthrough Behaviors of Carbon Dioxide with Zeolite 3A, 4A, 5A, and 13X Pellets