화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.22, No.6, 844-851, November, 2005
DOI10.1007/BF02705663  Export Citation
Pt-V2O5-WO3/TiO2 Catalysts Supported on SiC Filter for NO Reduction at Low Temperature
Joo-Hong Choi†, Jin-Hyun Kim, Young-Cheoul Bak, Rose Amal1, and Jason Scott1
  • Department of Chemical and Biological Engineering/ERI, Gyeongsang National University, 900 Gazwa-Dong, Jinju 660-701, Korea
  • 1School of Chemical Engineering and Industrial Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
E-mail:
The catalytic filter, V2O5-WO3-TiO2 supported on a ceramic filter, is known as a promising material for treating particulates and NOx simultaneously at optimum temperatures around 320 ℃. In order to improve its catalytic activity at low temperatures, the effect of Pt addition on the catalytic filter has been investigated. Catalytic filters, Pt-V2O5-WO3-TiO2 /SiC, were prepared by co-impregnation of Pt, V, and W precursors on TiO2 coated-SiC filter by vacuum aided-dip coating. The Pt-added catalytic filter shifted the optimum working temperature from 280-330 ℃ (for the non Pt-impregnated filter) to 180-230 ℃, providing Nx slip concentration less than 20 ppm for the treatment of 700 ppm NO at a face velocity of 2 cm/s with the same value over the non Pt-added catalytic filters. The promotional effect following the addition of Pt is believed to result from electrical modification of the catalyst maintaining a high electron transfer state. Ammonia oxidation was also observed to be dominant above the optimal temperature for SCR.
Keywords:Catalytic Filter;NO Reduction;Ammonia;Platinum Effect;Low Temperature;Ceramic Filter
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