| A mathematical and experimental investigation of the reaction of a chromite ore with an air-sulfur dioxide gas stream has been performed. The effects of gas flow rate, gas composition, temperature, chromite grain size, porosity, sodium sulfate addition, and time on reaction were studied. The results indicate that appreciable reaction of the sulfur dioxide is possible and that the reaction forms FeS and Cr(,2)O(,3). Fluidized bed experiments, followed by ferric sulfate leaching, indicate that chromite ores may be used to scrub SO(,2) from gas streams with the resultant solid product being upgradable. The kinetics of the gas-solid reaction are modeled using a pore change, molar volume change, diffusion controlled model. |
