Reduction Of CO(2) emissions especially for power plants is inevitable. Highly-efficient solid sorbent for CO(2) has been demanded so far. In this work, Ca(2)SiO(4) was synthesised from CaCO(3) Plus SiO(2) at 800 degrees C under essential inert gas atmosphere, then the product was characterised via XRD analysis. Ca(2)SiO(4) can absorb CO(2) fast at a broad temperature gap ranging from 500 degrees C to 800 degrees C. Reaction in CO(2) sorption and desorption of Ca(2)SiO(4) was found to be reversible. CO(2) sorption efficiency increased with increasing temperature within the temperature range below 800 degrees C, reaching a peak of 45.68%, and it decreased when the temperature exceeded 850 degrees C. The optimal temperature for the reaction is 800 degrees C. CO(2) sorption-desorption efficiency descended with rising cycle time. The decaying rate is averagely about 1.92% per cycle with 40 min or so. Ca(2)SiO(4) could maintain its original block shape during the cycle processes. The spent Ca(2)SiO(4) can be replaced due to low cost and easy preparing techniques. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.