Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지

Efficiency of catalyst-coated ceramic filter with acid treatment

촉매담지 세라믹 필터의 표면 산처리 효과

  • 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.)
  • 조을훈 (고려대학교 재료공학과) ;
  • 서광석 (고려대학교 재료공학과) ;
  • 김수효 (한국산업기술시험원 재료평가팀) ;
  • 신민철 (한국산업기술시험원 재료평가팀) ;
  • 신병길 (부산대학교 재료공학부) ;
  • 김진성 (부산대학교 재료공학부) ;
  • 이희수 (부산대학교 재료공학부)
  • Published : 2008.04.30
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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.

코디어라이트를 원료로 하여 다공성 세라믹 필터를 제조하였고, 진공함침법으로 $V_2O_5$ 촉매를 코팅하였다. 제조된 세라믹 필터의 기공률은 58%, 압축강도는 10 MPa, 400$^{\circ}C$, 5 cm/sec의 유속에서 압력손실은 1,200 Pa이었다. $V_2O_5$ 촉매의 경우 $NO_x$에 대해 80% 이상의 처리효율을 나타내었고, 산처리에 의한 필터의 비표면적 증가를 통해 처리효율을 약 10%개선할 수 있었다. 이는 필터의 비표면적 증가를 통해 코팅된 촉매의 분산성을 향상시킴으로써 촉매의 활성점이 증대되었기 때문으로 판단된다.

Keywords

References

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