Kinetic Studies on Carbon Dioxide Capture using Activated Carbon

Abstract

Global warming and global climatic changes resulted from anthropogenic carbon dioxide (CO₂) emissions has become the main issue recently. Since the beginning of industrial revolution, the concentration of CO₂ has increased more than 30 % in the atmosphere, and resulted in various catastrophic occurrences. This study focused on the influence of temperature at 25, 50, and 100 ^oC towards the CO₂ adsorption capacity.
Maximum CO₂ sorption capacity on the synthesized activated carbon is found to be 80 mg CO₂ per gram adsorbent. Experimental data is modelled through Lagergren first-order, pseudo-second-order, and intra- particle diffusion model. From the correlation coefficient, it is found that the pseudo-second-order model is well-fitted with the experimental data. In addition, the activation energy is found to be less than 42 kJ/mol, and it is proved that the physical adsorption occurs.