REACTIVITY AND DURABILITY OF V205 CATALYSTS SUPPORTED ON SULFATED Ti02 FOR SELECTIVE REDUCTION OF NO BY NH3

Choo, Soo Tae; Nam, Chang Mo

doi:2005.10.1.31

Environmental Engineering Research 2005;10(1): 31-37. DOI: https://doi.org/10.4491/eer.2005.10.1.031

REACTIVITY AND DURABILITY OF V205 CATALYSTS SUPPORTED ON SULFATED Ti02 FOR SELECTIVE REDUCTION OF NO BY NH3

¹Plant Engineering Center, Institute for Advanced Engineering (IAE), IAE Suwon branch, Energy System Research Center Bldg., Ajou University, Suwon, Kyonggi-do 442-749, Korea
²Div. of Health & Environmental Engineering, Yeungnam College of Science and Technology, 1737 Daemyung, Namgu, Daegu City 705-037, Korea

Corresponding Author: Soo Tae Choo ,Tel: +82-31 -219-2679, Fax: +82-31 -216-9125, Email: stchoo@iae.re.kr

Received: July 9, 2004; Accepted: February 8, 2005.

ABSTRACT

The selective catalytic experiments using both sulfated/sulfur-free titania and V^Os/TiOi 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/T1O2 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/poiymeric 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 V205/Ti02 catalysts, showing good durability against SO2 and water vapor, which is compared with deactivation at lower temperatures.