regeneration study on active components supplement of waste v2o5-wo3/tio2 scr catalyst

The waste selective catalytic reduction (scr) catalysts were regenerated by active components supplement on the basis of alkali/acid washing treatment. through orthogonal design, the regenerated scr catalyst restored the denitration activity of 98.36% at optimal regeneration parameters of 6% wo3 loaded after 1.2% v2o5 loaded and then calcined at 500 oc. the catalysts were characterized by xrd and h2-tpr techniques. the xrd patterns and the ft-ir spectrogram showed that the supplemented v2o5 and wo3 were dispersed uniformly in an amorphous state on the surface of tio2 support which remained as the anatase phase. the h2-tpr characterization reported that v2o5 significantly affected the low-temperature activity while wo3 mainly affected the high-temperature activity, the loading sequence of v2o5 before wo3 not only enhanced the interaction between v2o5 and tio2 but also facilitated the enrichment of wo3 on tio2 surface.