The impregnation method was employed to prepare the CeO_2-Fe_2O_3/TiO_2 catalyst and the influence of reaction temperature on denitrification efficiency of the CeO_2-Fe_2O_3/TiO_2 catalyst with different amounts of CeO_2 was studied.Moreover

the SO_2 resistance and alkali metal poisoning resistance of the10%CeO_2

3%Fe_2O_3catalysts were investigated.The experimental results show that

the optimum reaction temperature for the CeO_2-Fe_2O_3/TiO_2 catalyst is 350℃.The optimum proportion of iron cerium oxide catalyst is CeO_2 in 10%and Fe_2O_3 in 3%

with this proportion

the NO_ removal rate can reach up to 95.65%.The 10%-3%CeO_2-Fe_2O_3/TiO_2 catalyst has good performance of SO_2 resistance.The alkali metal(K

Na)salt has poisoned effect on the catalyst

but has no influence on the catalytic active ingredient of crystal phase

it just weakened the combination between the active ingredient and the carrier.The potassium salt has more significant influence than the sodium salt.The denitration performance degradation may be caused by the reduction in NH_3 adsorption ability.