Activated carbon (AC) prepared from corn cobs was used as anadsorbent for CO2 capture under different temperatures. The characterization byBoehm titration and TGA showed that the total acidic groups of AC weresignificantly higher than the total basic groups, and the increasing activatedtemperature resulted in increases in the total basicity and decreases in the totalacidity. The CO2 adsorption behavior of AC was predicted by four isothermmodels. It was found that the suitable order was Sips >
Tóth >
Freudlich >
Langmuir. The maximum monolayer coverage capacity and isosteric heat ofadsorption were in the range of 6.28 - 10.92 mmol g-1 and 26.48 - 21.55 kJ mol-1,respectively. High specific surface area and high amount of carboxylic groups werefound to be in favor of CO2 capture.Activated carbon (AC) prepared from corn cobs was used as anadsorbent for CO2 capture under different temperatures. The characterization byBoehm titration and TGA showed that the total acidic groups of AC weresignificantly higher than the total basic groups, and the increasing activatedtemperature resulted in increases in the total basicity and decreases in the totalacidity. The CO2 adsorption behavior of AC was predicted by four isothermmodels. It was found that the suitable order was Sips >
Tóth >
Freudlich >
Langmuir. The maximum monolayer coverage capacity and isosteric heat ofadsorption were in the range of 6.28 - 10.92 mmol g-1 and 26.48 - 21.55 kJ mol-1,respectively. High specific surface area and high amount of carboxylic groups werefound to be in favor of CO2 capture.