Abstract:

Zeolites, metal organic frameworks (MOFs), carbon nanotubes, polymers, and activated carbons have been commonly used as porous adsorbents for CO2 adsorption. The objective of the study was to prepare low-cost activated carbon from carob stones and compare its adsorption capacities for CO2 with that of commercial mesoporous silica and four zeolites (zeolite, 4A zeolite, ammonium Y and sodium Y zeolites). CO2 adsorption on these porous adsorbents was investigated by using volumetric adsorption apparatus, TriStar II 3020 at room temperature and at pressures up to 900 mmHg. The CO2 adsortion capacities (wt%) were determined using the values of the quantity adsorbed at 900 mmHg. It could be confirmed that chemical activation plays an important role in determining the porous structure and amount of CO2 adsorbed.

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