ACTIVITY PROMOTION OF THE CrOx/Al2O3 CATALYST WITH Ce, Mn OR Ru IN THE OXIDATIVE DECOMPOSITION OF TRICHLOROETHYLENE

Lee, Deuk Ki; Cho, Jeong Shik; Park, Jong Soo; Yoon, Wang Lai

doi:2002.7.1.11

Environmental Engineering Research 2002;7(1): 11-19. DOI: https://doi.org/10.4491/eer.2002.7.1.011

ACTIVITY PROMOTION OF THE CrO_x/Al₂O₃ CATALYST WITH Ce, Mn OR Ru IN THE OXIDATIVE DECOMPOSITION OF TRICHLOROETHYLENE

Deuk Ki Lee¹^†, Jeong Shik Cho¹, Jong Soo Park², and Wang Lai Yoon²

¹Division of Civil and Environmental Engineering, Kwangju University, Kwangju 503-703, Korea
²Conversion Process Research Team, Korea Institute of Energy Research, Daejeon 305-343, Korea

Corresponding Author: Deuk Ki Lee ,Tel: +82-62-670-2394, Fax: +82-62-670-2192, Email: dklee@hosim.kwangju.ac.kr

Received: July 6, 2001; Accepted: November 7, 2001.

ABSTRACT

Alumina-supported metal oxide catalysts of Cr, Co, Ru, Cu, V, Ni, Mn and Ce were prepared and evaluated in their comparative catalytic activities in the oxidative decomposition reaction of trichloroethylene (TCE) in air. The highest catalytic activity was observed for the CKVAI2O3 catalyst. Catalytic activity promotion was found to exist for the Cr-based catalysts containing Ce, Mn or Ru as a promoter. The binary component catalytic systems of Ce-Cr, Mn-Cr and Ru-Cr were optimized in their metal compositions to get the highest activity in the TCE decomposition reaction. Ru(0.4 wt%)Cr(9.6 wt%)/Al203 catalyst showed the highest activity with the increased reaction rate 2.1 times higher than the Cr(10 wt%)/Al203 catalyst. Catalytic activities of the CrCX-based catalysts were discussed in relation with the redox properties and acidities which were determined by temperature programmed reduction (TPR) and temperature programmed desorption of NH3 (NH3-TPD), respectively.

Keywords: catalytic oxidative decomposition | CrO_x/Al₂C₃> | Ru | Mn | Ce | promoter effect | trichloroethylene