Reduction Kinetics of Cu-, Ni-, and Fe-based Oxygen Carriers Using Syngas (CO+H2) for Chemical-Looping Combustion
نویسندگان
چکیده
The reactivity of three Cu-, Fe-, and Ni-based oxygen carriers to be used in a chemical-looping combustion (CLC) system using syngas as fuel has been analyzed. The oxygen carriers exhibited high reactivity during reduction with fuel gases present in syngas (H2 and CO), with average values in the range 8-30 % min. No effect of the gas products (H2O, CO2) on the reduction reaction rate was detected. The kinetic parameters of reaction with H2 and CO have been determined by thermogravimetric analysis. The grain model with spherical or plate-like geometry in the grain was used for the kinetic determination, in which the chemical reaction controlled the global reaction rate. The * Corresponding author. Tel: +34976 733977. Fax: +46976 733318. E-mail: [email protected] Submitted, accepted and published by Energy & Fuels 2007, 21, 1843-1853
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