Activated Carbon for Carbon Dioxide Gas Adsorbent

Carbon dioxide from the biogas resulted in vinasse fermentation should be treated. One of the methods that could reduce carbon dioxide was the adsorption process. A chemical and physical process could modify the characteristic of carbon and obtain activated carbon as an adsorbent. Chemical activation using H2SO4 ranged from 5% to 30%, and physical activation using pyrolysis at 400oC for 3 hours. The adsorption process was done by inserting 98.68% synthetic CO2 range from 0.002 to 0.0058 L/min from the bottom of the adsorption column with 5 cm in diameter and 30 cm in height. Chemical activation with 25% H2SO4 achieved the best result. Characteristics of activated carbon were analyzed using proximate and BET analysis, where the ash content was 3.93%, fixed carbon 80.015, the surface area was 5992.65 m2/gr with a total pore volume of 39.4620 cc/gr, and pore radius average was 2.6072 Å. The value of CO2 adsorbed was 99.939% at a gas rate of 0.0022 L/min.