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http://dx.doi.org/10.4491/eer.2005.10.1.031

REACTIVITY AND DURABILITY OF V2O5 CATALYSTS SUPPORTED ON SULFATED TIO2 FOR SELECTIVE REDUCTION OF NO BY NH3  

Choo, Soo-Tae
Nam, Chang-Mo
Publication Information
Environmental Engineering Research / v.10, no.1, 2005 , pp. 31-37 More about this Journal
Abstract
The selective catalytic experiments using both sulfated/sulfur-free titania and V2O5/TiO2 catalysts have been conducted for NO reduction by NH3 in a packed-bed, down-flow reactor. The sulfated and vanadia loaded titania exhibited higher activity for NO removal than the sulfur-free catalysts, where > 90% NO removal was achieved over the sulfated V2O5/TiO2 catalyst between 280∼500 C. The surface structure of vanadia species on the catalyst surface played a critical role in the high performance of catalysts in which the existence of monomeric/polymeric vanadate is revealed by Raman spectra studies. Water vapor and SO2 were added to the reacting system for the catalyst deactivation tests. At higher temperatures (T ≥ 350 C), little deactivation was observed over the sulfated V2O5/TiO2 catalysts, showing good durability against SO2 and water vapor, which is compared with deactivation at lower temperatures.
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