Study on CO₂ recovery system from flue gas by honeycomb type adsorbent I (results of tests and simulation)

Carbon dioxide (CO₂) included in the exhaust gas from heat power plants is the chief cause of global warming. In the present study, we focused on the rotary adsorption towers filled with honeycomb-type adsorbent and conducted the following experiments and simulations. 1. Preliminary experiment for ablation and condensation of CO₂ by thermal swing adsorption (TSA) method. 2. Pilot plant tests. 3. Simulations of adsorption and desorption of CO₂ for the system optimization. From the preliminary experiment, it was clarified that the equilibrium adsorption of CO₂ followed the Langmuir model as a function of concentration and temperature, and the J factor for mass and heat transfer between gas and solid was obtained as a function of Reynolds number. The CO₂ recovery rate of the pilot plant, having an inner diameter of 460 mm. and height of adsorbent is 480 mm. could be greater than 80%. These experimental results were compared with simulation results and showed good agreement. Furthermore, adsorption and desorption of CO₂ were successfully simulated at each adsorption, heating, purge, and cooling stage. These results could be helpful guidance for the system optimization of rotary CO₂ plants.