A reaction kinetic study of CO2 gasification of petroleum coke, coals and mixture

Abstract

Characteristics of Char-CO2 gasification for petroleum coke, biomass and mixed fuels were compared in the temperature range of 1,100∼1,400 ℃ using TGA (Thermogravimetric analyzer). Kinetic constants with respect to reaction temperature were de- termined by using different gas-solid reaction models. Also activation energy (Ea) and pre-exponential factors (K0) in each models were calculated by using Arrhenius equation and then were compared with experimental values to determine reaction rate equation for char-CO2 gasification. Reaction time for CO2 gasification decreased with an increase of reaction temperature. Also, the activation energy of CO2 gasification reaction for mixture with petroleum coke and biomass decreased with increas- ing biomass contents. This indicates that mixing with biomass could bring synergy effects on CO2 gasification reaction.