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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
Soo Tae Choo1, and Chang Mo Nam2
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.
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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.
Keywords: Catalytic activity | Deactivation | V20s/Ti02 | Sulfated catalyst | Nitric oxide | SCR
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