Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Photocatalytic Degradation of Gaseous Acetaldehyde through TiO2-Coated Fly Ash Composites

TiO2 코팅 석탄회 복합체의 기상 Acetaldehyde 광분해 특성

  • Shin, Dae-Yong (Department Advanced Materials Science & Engineering, Samcheok Campus, Kangwon National University) ;
  • Kim, Kyung-Nam (Hub University for Industrial Collaboration, Kangwon National University)
  • 신대용 (강원대학교 삼척캠퍼스 신소재공학과) ;
  • 김경남 (강원대학교 산학협력중심대학)
  • Published : 2008.01.31
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Abstract

The photocatalyst of $TiO_2$ coated on a fly ash composites (TCF) was prepared from precipitant dropping method to remove the acetaldehyde by photocatalytic reaction. The TCF were characterized by crystal aize, crystal structure and specific surface area. The photodegradation of acetaldehyde has been investigated using a UV-illuminated fixed photocatalytic reactor with TCF catalyst and P-25 catalyst in gas phase. The effect of photodegradation reaction conditions, such as initial concentration of acetaldehyde, concentration of oxidant in mixed gas and the light intensity on the photodegradation of acetaldehyde were investigated. P-25 catalyst showed the highest photodegradation of acetaldehyde and anatase $TiO_2$ coated TCF showed higher decomposition rate than rutile coated TCF. The photodegradation rate of acetaldehyde increased with the decrease of flow rate, initial concentration of acetaldehyde ($C_i$) and water vapor, however, it was increased with the increas of UV light intensity. The optimum conditions were weight of TCF=10 g, flow rate=50 ml/min $C_i$=100 ppm, concentration of oxygen=20%, concentration of water vapor=100 ppm.

Keywords

References

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