Experimental Research on Low Temperature Denitration of Fe₂O₃/CAC

Fe₂O₃ was loaded on coke with impregnation method, and the activated coke modified by the load was column-shaped,and the low temperature denitration performance of Fe₂O₃/CAC (columnar activated coke, CAC) of different loadings was studied. The results show that denitrification efficiency of Fe₂O₃/CAC is the best when the mass fraction of Fe is 6%, especially at 140℃, the denitration is up to 75.6%. When SO₂ content is changed, the desulfurization efficiency of Fe₂O₃/CAC is stable at 90%, and the denitration efficiency is at least 59.2%. SO₂ and H₂O have great influence on the desulfurization and denitrification efficiency of Fe₂O₃/CAC.When the volume fraction of SO₂ and H₂O is 0.04% and 9.5%, the desulfurization and denitrification efficiency is stable at 60% and 40% respectively. At the optimum loading, the adsorption-desorption curve of Fe₂O₃/CAC belongs to the type II isotherm of H4 hysteresis ring.The content of SiO₂ and Fe₂O₃ in Fe₂O₃/CAC is high and Fe mainly exists in the form of γ-Fe₂O₃, which improves the low temperature denitration performance of Fe₂O₃/CAC.The drop strength of columnar Fe₂O₃/CAC of different loads is about 50%.