Effect of Water Gas Shift Reaction on the Non-Isothermal Reduction of Wustite Porous Pellet Using Syngas

Abstract

Effect of water gas shift reaction (CO+H2O=CO2+H2) on wustite reduction has been investigated by a transient, non-isothermal mathematical model based on grain model. In this model, wustite porous pellet is reduced using Syngas, namely a mixture of hydrogen, carbon monoxide, carbon dioxide and water vapor. For this purpose, governing equations containing continuity equation of species and energy equation have numerically been solved by finite volume fully implicit method. The model has been validated by comparing it with experimental data from literature. It was found a good agreement between model results and experimental data. Model results have beenpresented for the pellet reduction including with and without Water Gas Shift Reaction (WGSR). It was foundthat in pellet scale model, the effect of WGSR is not considerable on the rate of wustite reduction and temperaturedistribution inside the pellet. However it affects the distribution of mole fraction of gaseous species considerably.