Korean Chemical Engineering Research

  • 제57권6호
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  • Pages.891-897
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  • 2019
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
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기상 포름알데히드 반응을 위한 활성탄에 담지한 P-V-Mo 촉매의 조성에 따른 영향

Effects of Composition in P-V-Mo Catalysts Supported on Activated Carbon for Vapor Formaldehyde Reaction

  • 이소은 (한국에너지기술연구원 기후변화연구본부) ;
  • 김성수 (한국에너지기술연구원 기후변화연구본부) ;
  • 정도영 (한국원자력연구원 양자광학연구부) ;
  • 강용 (충남대학교 응용화학공학과) ;
  • 이승재 (한국에너지기술연구원 기후변화연구본부)
  • Lee, So-eun (Climate Change Research Division, Korea Institute of Energy Research (KIER)) ;
  • Kim, Seong-Soo (Climate Change Research Division, Korea Institute of Energy Research (KIER)) ;
  • Jeong, Do-Young (Quantum Optics Division, Korea Atomic Energy Research Institute (KAERI)) ;
  • Kang, Yong (Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Lee, Seung-Jae (Climate Change Research Division, Korea Institute of Energy Research (KIER))
  • 투고 : 2019.08.01
  • 심사 : 2019.08.21
  • 발행 : 2019.12.01
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초록

본 연구에서는 Phosphoric acid ($H_3PO_4$)와 Vanadium (V) pentoxide ($V_2O_5$), Molybdenum (VI) trioxide ($MoO_3$)으로 부터 조성을 달리하여, heteropoly acid의 PVMo 촉매를 활성탄 지지체에 담지하였다. 촉매의 반응성 조사를 위해, 기상의 포름알데히드를 $140^{\circ}C$의 온도에서 1시간 동안 반응시켰다. 반응전후의 촉매는 XRD와 BET 분석을 수행하였으며, 촉매의 산도 측정을 위해 $NH_3-TPD$을 수행하였다. 포름알데히드의 전환율은 $MoO_3$와 $H_3PO_4$ 성분이 감소하고 $V_2O_5$ 성분이 증가함에 따라 증가하였다. 대부분의 촉매에서 비교적 낮은 촉매 결정성이 관찰되었으며, 비표면적은 반응후 다소 감소하는 것으로 나타났다. $NH_3-TPD$ 분석 결과, $400^{\circ}C{\sim}500^{\circ}C$에 해당하는 강한 산점의 비율이 $MoO_3$와 $H_3PO_4$ 성분의 함량이 감소하고 $V_2O_5$ 성분의 함량이 증가함에 따라 증가하였다. 이러한 강한 산점의 비율이 포름알데히드의 전환율에 영향을 미치는 것으로 나타났다.

In this study, heteropoly acid PVMo catalysts were supported on activated carbon with various composition of phosphoric acid ($H_3PO_4$), vanadium (V) pentoxide ($V_2O_5$) and molybdenum (VI) trioxide ($MoO_3$). Catalytic performance was examined at $140^{\circ}C$ for 1hour in vapor formaldehyde. XRD and BET analyses were carried with the catalysts before and after the reaction. Formaldehyde conversion was increased with decreasing Mo and $H_3PO_4$ content and increasing $V_2O_5$ content. Acidity of the catalysts was investigated with $NH_3-TPD$. Crystallinity of the catalysts was relatively low, and surface area was decreased after the reaction. In $NH_3-TPD$ result, the ratio of strong acid site corresponding to $NH_3$ desorption between $400^{\circ}C$ and $500^{\circ}C$ was increased by decreasing $MoO_3$ and $H_3PO_4$ content and increasing $V_2O_5$ content. Therefore, it was found that the strong acid site could affect the catalytic reactivity in vapor formaldehyde conversion.

키워드

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