Changes in the chemical composition of V2O5-loaded CVC-TiO2 materials with calcination temperatures for NH3-SCR of NOx

Title
Changes in the chemical composition of V2O5-loaded CVC-TiO2 materials with calcination temperatures for NH3-SCR of NOx
Authors
차우준박은석진성민윤성택정종수
Keywords
TiO2; Chemical vapor condensation; NH3-SCR; V4+/5+; NOx reduction; Formic acid; calcination temperature
Issue Date
2013-10
Publisher
Journal of porous materials
Citation
VOL 20, NO 5, 1069-1074
Abstract
In this study, the aim was to evaluate the effect of calcinations temperature on the catalytic activity and chemical composition of V2O5/TiO2. We prepared V2O5- loaded CVC-TiO2 catalysts by a combination of chemical vapor condensation (CVC) and impregnation method at different calcination temperatures. These catalysts were analyzed for their ability to catalyze NH3-based selective catalytic reduction of NOx. Compared with V2O5 loaded P25-TiO2 (commercial). V2O5/CVC-TiO2 catalysts calcined above 200 ℃ exhibited better performance towards NOx conversion than that by a commercial catalyst prepared using P25-TiO2 (calcined at 500 ℃). In addition, the NOx conversion rate obtained with the sample calcined at 500 ℃ gave the best result (90 %) at a reaction temperature of 200 ℃. From the XPS results, we observed that the V4+/5+ ratio was well balanced when the V2O5 loaded CVC-TiO2 sample was calcined at 500 ℃.
URI
http://pubs.kist.re.kr/handle/201004/45820
ISSN
13802224
Appears in Collections:
KIST Publication > Article
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