CO2 capture from exhaust gas using rice husk (RH) and oil palm fiber (OPF) as potential raw materials for the preparation of activated carbon (AC) was studied. Physical activation was employed using water vapour at 800 oC for preparation of the AC. Physicochemical properties were determined using standard methods, while FTIR was used to determine the functional group in the prepared AC. The effects of particle size, contact time, and adsorbent dosage were studied to evaluate the adsorption capacity of the activated carbons. The values of the physicochemical properties evaluated for RH and OPF activated carbons were respectively: moisture (2.100, 3.400%), ash (6.40, 4.90%), volatile matter (13.40, 24.50%), fixed carbon (78.10, 67.20%), bulk density (0.68, 0.56 g/cm3 ), surface area (850.00, 730.00 m2 g), and iodine number (814.40, 679.40 mg/g).The results of FTIR spectra of the activated carbons revealed the presence of hydroxyl, phenols, carboxyl, carbonyl, lacton