A catalyst for removing NO from flue gas is prepared by using different alkali-modified gas ash,a kind of solid waste,to achieve the goal of"treating wastes with wastes".The influences of the preparation conditions such as impregnation concentration,solid-to-liquid ratio and sonication time on the denitrification performance of the gas ash-derived are investigated,and the catalyst is characterized by means of XRF,XRD,SEM,EDS-Mapping and FT-IR.The results show that the gas ash modified with KOH shows the best denitrification performance,which can deliver a denitrification rate of about 100％under the best preparation conditions that KOH concentration is 2 mol·L-1,solid-liquid ratio is 1∶2,and sonication time is 40 min.After the modification,K has successfully been loaded on the material surface,the microstructure of gas ash has been changed,and the new substances generated provide more active sites for NO removal.
维普
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