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The microkinetics of H2S removal by ZnO desulfurization in H2O-CO2-N2, H2O-CO-N2 and H2O-O2-N2 gas mixtures was studied by thermogravimetric analysis. Experiments were carried out with 100-120 mesh ZnO powder at temperatures from 473 K to 563 K. The results show that the kinetic behaviors of desulfurization could all be described by an improved shrinking-core model. The activation energies of the reaction and the diffusion in different gas atmospheres were estimated.
The microkinetics of H2S removal by ZnO desulfurization in H2O-CO2-N2, H2O-CO-N2 and H2O-O2-N2 gas mixtures was studied by thermogravimetric analysis. Experiments were carried out with 100-120 mesh ZnO powder at temperatures from 473 K to 563 K. The results show that the kinetic behaviors of desulfurization could all be described by an improved shrinking-core model. The activation energies of the reaction and the diffusion in different gas atmospheres were estimated.