Calcium-oxide-based sorbents were coated onto Saffil ceramic fibers by means of a wet impregnation method. The effect of synthesis parameters on the crystalline structure, morphology, and texture of the CaO layer was investigated by Xray diffraction, scanning electron microscopy, and gas adsorption techniques. The analyses revealed that the optimized synthesis method produced a uniform coating composed of a network of CaO nanoflakes. The evaluation of the materials as CO2 sorbents was performed under repeated carbonation-decarbonation cycles using thermogravimetric analysis (TGA). A nominal 2S wt % loading of CaO gave a CO2 uptake capacity of 0.118 mg of CO2/mg of sorbent (carbonation at 650 degrees C in 90% CO2 and decarbonation at 850 degrees C in N-2). A S wt % loading exhibited improved durability with a similar to 30% decay in carrying capacity after 30 TGA cycles but at the expense of the initial uptake capacity.