Characterization of Zeolite as an Adsorbent for Capturing CO2

The characterization of zeolites as an adsorbent for capturing CO2 from biogas has been done chemically and physically. The chemically treatment is using H2SO4 as an activator with varying concentrations in the range of 5%-30% and physically treatment is calcination at 500 degrees C for 4 hr. Adsorption process carried out by flowing CO2 synthetic gas (98.86%) from the bottom of the adsorber column with a flow rate of 0.22 cc/min until 0.58 cc/min. Absorber column have a diameter 5 cm and height of 30 cm, height of adsorbent 28 cm and the grain size of the zeolite -20/+28 mesh. The research resulted in the best condition in chemical activation of 25% H2SO4 and calcination increasing ratio Si/Al of 5.5 to 9.73. Characterization of zeolites have a total pore volume of 15.001 cc/g, pore surface area of 998.032 m(2)/g, mean pore radius 28.997 angstrom and CO2 absorption capacity of about 75.5% at the gas rate penetrating to the adsorber of 0.22 cc/minute.