Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on the Characteristics of a Pt/TiO2 Catalyst Prepared by Liquid-Phase Ruduction for Formaldehyde Oxidation at Room Temperature

액상환원 기반 Pt/TiO2 촉매 제조를 이용한 포름알데히드 상온 산화 반응 특성 연구

  • Jae Heon Kim (Department of Environmental Energy Engineering, Graduate School of Kyonggi University) ;
  • Younghee Jang (Department of Environmental Energy Engineering, Graduate School of Kyonggi University) ;
  • Geo Jong Kim (Korea Research Institute of Chemical Technology) ;
  • Sung Chul Kim (Department of Environmental Energy Engineering, Kyonggi University) ;
  • Sung Su Kim (Department of Environmental Energy Engineering, Kyonggi University)
  • 김재헌 (경기대학교 일반대학원 환경에너지공학과) ;
  • 장영희 (경기대학교 일반대학원 환경에너지공학과) ;
  • 김거종 (한국화학연구원) ;
  • 김성철 (경기대학교 환경에너지공학과) ;
  • 김성수 (경기대학교 환경에너지공학과)
  • Received : 2023.11.08
  • Accepted : 2023.11.20
  • Published : 2023.12.10
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Abstract

Modern society spends more than 80% of its daily life indoors, emphasizing the need for attention to indoor air pollution due to the improvement in living standards. In this study, the performance and reaction characteristics of the Pt/TiO2 catalysts prepared by liquid-phase reduction for the removal of formaldehyde (HCHO), one of the indoor air pollutants, at room temperature without the need for additional light or heat were investigated. As a result, it showed that catalysts prepared by the same method showed approximately 40~80% various activities depending on the type of TiO2. XRD, BET, and XPS analyses were performed to investigate the particle size, crystal structure, specific surface area, and O/Ti molar ratio of the support material, and it revealed that the correlation between the properties and performance was insignificant. To explore the oxidation reaction pathway of formaldehyde (HCHO), in situ DRIFT analysis using carbon monoxide and H2-TPR was perfomed. The results revealed that the performance was demonstrated by the oxidation state of the active metal and the adsorption-desorption characteristics of the adsorbate species.

현대 사회는 일상생활 중 80% 이상을 실내에서 생활하고, 생활수준의 향상으로 실내오염물질 노출에 대한 유의가 필요하다. 본 연구에서는 실내오염물질 중 하나인 포름알데히드(HCHO)를 별도의 빛 또는 열 없이 상온에서 제거할 수 있는 액상환원법 기반 Pt/TiO2 촉매의 성능 및 반응 특성을 조사하였다. 활성실험을 통해, 동일한 방법으로 제조된 촉매라도 TiO2 종류에 따라 약 40~80%의 서로 다른 활성을 나타냄을 확인하였다. XRD, BET, XPS 분석을 통해 지지체의 입사 사이즈, 결정구조, 비표면적 및 O/Ti molar ratio를 조사하였고, 지지체 자체의 물성과 성능 간 상관성은 미미함을 확인하였다. HCHO 산화 반응 경로를 조사하기 위해 일산화탄소를 활용한 In situ DRIFT 분석과 H2-TPR을 수행하였다. 그 결과, 촉매의 성능이 활성금속의 산화상태 및 흡착종의 흡탈착 특성에 지배받음을 확인할 수 있었다.

Keywords

Acknowledgement

본 연구는 한국환경산업기술원의 대기 환경산업 경쟁력 강화 국산화 기술 개발사업을 지원받아 수행된 연구로 이에 감사드립니다(No. RS-2023-00220022).

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