Temperature swing adsorption process for CO₂ capture using polyaniline solid sorbent

To capture carbon dioxide from power plant flue gas which consists of 15% CO₂ and 85% N₂, with a temperature swing adsorption (TSA) by using polyaniline solid sorbent as the adsorbent, is explored experimentally and theoretically. First, single component adsorption equilibrium data of carbon dioxide on polyaniline solid sorbent is obtained by using Micro-Balance Thermo D-200. Then isotherm curves and the parameters are obtained by numerical method. The adsorption is expressed by the Langmuir-Freundlich isotherm. After accomplishment of isotherm curves, the breakthrough curve experiment is investigated with single adsorption column. The experiments test the change in adsorbed gas concentration at the outlet by adsorbed gas, CO₂, and non-adsorbed gas, helium. Finally, this study accentuates the TSA experiments on CO₂ purity and recovery by operation variable discussion which includes feed pressure, adsorption temperature and desorption temperature to find optimal operation condition. The results of optimal operation condition are CO₂ purity of 47.65% with a 92.46% recovery.