| 초록 |
Adipic acid is one of the essential materials to manufacture synthetic fibers like nylon-6/6. The effluent gas of adipic acid production mainly consists of N2O, O2, N2, CO2, and H2O. A significant amount of N2O is emitted from the process, and N2O is one of the representative non-CO2 greenhouse gases, it should be recovered from the effluent gases for the mitigation of global climate change. The recovered N2O can be widely applied to many industrial areas such as medicine, semiconductor, and optics. In this study, to select an appropriate adsorbent for equilibrium separation and kinetic separation, adsorption isotherms of N2O, O2 and N2 are measured on carbon type and silica type adsorbents by a volumetric method. Adsorbents for equilibrium separation are evaluated considering adsorption amount and affinity, and adsorbents for kinetic separation are evaluated considering the difference in adsorption rate. The adsorption uptake curves are derived from non-isothermal model and isothermal dual resistance model. The models applied to each system consider the adsorption characteristics. |
