Comparison study on nanocrystalline alkali and alkali-earth based materials as high-temperature CO2 acceptors

FUEL 7

Tiejun Zhao, tiejun@chemeng.ntnu.no, Esther Ochoa-Fernández, esther.ochoa@chemeng.ntnu.no, Magnus Rønning, and De Chen. Department of Chemical Engineering, Norwegian University of Science and Technology, Sem Saelands Vei 4, Trondheim, NO-7491, Norway
The effect of the preparation methods on the properties of alkali and alkali-earth based materials as carbon dioxide acceptors are systematically studied. It is found that a two-step calcination procedure is suitable for synthesizing the nanocrystalline acceptors with porous structures. All the obtained acceptor candidates are evaluated on a tapered element oscillating microbalance, and the results indicate that the CO2 capture rate is probably determined by the base strength and particle size of these acceptor candidates. Stable capture/regeneration behavior is also observed on these CO2 acceptors due to their peculiar physico-chemical properties of these synthetic materials. Sodium zirconate and calcium-based oxides is found very promising for further applications in sorption-enhanced steam reforming.
 

Green Chemistry for Sustainable Energy Supply and Conversion
8:25 AM-12:10 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 242, Oral

Sci-Mix
8:00 PM-10:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Sci-Mix

Division of Fuel Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008