Study On Reactions Between Hydrogen Chloride And Oxygen Carrier Fe₂O₃

In order to avoid dioxin emission from municipal solid waste combustion(MSW), chemical looping combustion was considered.Thermodynamic equilibrium was used to calculate the interactions between HC1 and CuO,Fe₂O₃,NiO and CaSO₄.The chlorine gas quantity,as well as the distribution of chlorides,metal elements,the Ca element and S element distribution were studied.The H₂O and C effect on the chlorine quantity was also investigated.The possible intermediate reactions were calculated with standard Gibbs free energy and reaction equilibrium constants for HCl and Fe₂O₃ reaction.The experiments about the reactions between HCl and Fe₂O₃ were carried out.Chlorine gas was measured by methyl orange spectrophotometric method.Results showed that rare chlorine beyond the detection limit was produced under 700 to 900℃,small amount of chlorine(＜1.5μg)was detected at 950℃.It was suggested that Fe₂O₃ could be used as an oxygen carrier for MSW disposing under 700 to 900℃.