Energy and Economic Analysis for Post-combustion CO2Capture using Amine-Functionalized Adsorbents in a Temperature Vacuum Swing Process

Post-combustion CO2capture using amine-functionalized solid adsorbents has been extensively investigated during the past 2 decades; however, the preparation of industrial adsorbents still underlies some key issues, and the energy consumption and economy of this process are not clear. Herein, we investigated the preparation of industrial M-MCM-T adsorbents via the conventional extrusion method, emphasizing the mechanical properties and CO2capture performance of the adsorbents. The 40M-MCM-55T adsorbent, with 40% montmorillonite as a binder and 55% tetraethylenepentamine, exhibited the maximum CO2adsorption capacity of 101.6 mg g–1at 75 °C and a high mechanical strength of 112.2 N cm–1. On the basis of the experimental results, the temperature vacuum swing (TVS) process with a capacity of 300 t/a CO2was designed to estimate the cost and energy requirements of this process; it revealed a cost of $29.68/tCO2and an energy consumption of about 4.20 GJ/tCO2. The results suggest the superiority and potential of using amine-functionalized solid adsorbents in the TVS process for CO2capture from flue gas in industry.