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Efficiency of catalyst-coated ceramic filter with acid treatment  

Cho, Eul-Hoon (Dept. of Materials Science & Engineering, Korea Univ.)
Suh, Kwang-Suck (Dept. of Materials Science & Engineering, Korea Univ.)
Kim, Su-Hyo (Material Analysis Team, Korea Testing Laboratory)
Shin, Min-Chul (Material Analysis Team, Korea Testing Laboratory)
Shin, Byeong-Kil (School of Materials Science and Engineering, Pusan National Univ.)
Kim, Jin-Seong (School of Materials Science and Engineering, Pusan National Univ.)
Lee, Hee-Soo (School of Materials Science and Engineering, Pusan National Univ.)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.18, no.2, 2008 , pp. 91-95 More about this Journal
Abstract
Ceramic filter was prepared using cordierite powder and it was coated with $V_2O_5$ catalyst by vacuum impregnation method. The filter had the apparent porosity of 58 %, the compressive strength of 10 MPa and the pressure drop of 1200 Pa at the face velocity of 5 cm/see and 400$^{\circ}C$. $NO_x$ removal efficiency of only $V_2O_5$ coated on cordierite filter showed the removal efficiency of 80 %, and it was improved up to 90 % by increasing specific surface area of filter elements from the acid treatment. The high surface area is due to the removal of Mg and Al ions from the silicate structure and subsequent generation of free amorphous silicate on the surface of the cordierite.
Keywords
Ceramic filter; Catalyst; Surface treatment$NO_x$;
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