Korean Chemical Engineering Research

  • 제54권3호
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  • Pages.419-424
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  • 2016
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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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황이 포함된 중형기공성 탄소에 화학적으로 고정화된 H5PMo10V2O40 촉매 상에서 Benzyl Alcohol 산화반응

Benzyl Alcohol Oxidation over H5PMo10V2O40 Catalyst Chemically Immobilized on Sulfur-containing Mesoporous Carbon

  • 김민영 (서울대학교 공과대학 화학생물공학부) ;
  • 강태훈 (서울대학교 공과대학 화학생물공학부) ;
  • 최정호 (서울대학교 공과대학 화학생물공학부) ;
  • 송인규 (서울대학교 공과대학 화학생물공학부)
  • Gim, Min Yeong (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Kang, Tae Hun (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Choi, Jung Ho (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Song, In Kyu (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University)
  • 투고 : 2015.11.19
  • 심사 : 2016.01.09
  • 발행 : 2016.06.01
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초록

황이 포함된 중형기공성 탄소 담체(S-MC)에 화학적으로 고정화된 $H_5PMo_{10}V_2O_{40}$ ($PMo_{10}V_2$) 촉매를 제조하고, 이를 Benzyl alcohol 산화반응에 적용해보았다. 먼저 주형물질로 SBA-15, 탄소 전구체로 p-Toluenesulfonic acid를 이용하여 S-MC 지지체를 제조하였다. 이후, $PMo_{10}V_2$ 촉매가 화학적으로 고정화될 수 있는 위치를 제공하기 위해 S-MC 지지체의 표면이 양전하를 띠도록 개질시켰다. 전체적으로 음전하를 띠는 $[PMo_{10}V_2O4_{40}]^{5-}$를 이용함으로써 $PMo_{10}V_2$를 양이온을 띠는 S-MC 표면에 화학적으로 고정화하였다. 화학적 고정화를 통해 $PMo_{10}V_2$가 분자수준으로 균일하게 분산되었음을 확인하였다. Benzyl alcohol의 기상 산화반응에서 $PMo_{10}V_2$/S-MC 촉매는 무담지 상태의 $PMo_{10}V_2$보다 높은 전화율 및 수율을 나타냈다. $PMo_{10}V_2$/S-MC 촉매의 반응 활성이 향상된 이유는 화학적 고정화를 통해 $PMo_{10}V_2$이 S-MC 지지체에 고르게 분산되었기 때문이다.

$H_5PMo_{10}V_2O_{40}$ ($PMo_{10}V_2$) catalyst chemically immobilized on sulfur-containing mesoporous carbon (S-MC) was prepared, and it was applied to the benzyl alcohol oxidation reaction. S-MC was synthesized by a templating method using SBA-15 and p-toluenesulfonic acid as a templating agent and a carbon precursor, respectively. S-MC was then modified to have a positive charge, and thus, to provide sites for the immobilization of $PMo_{10}V_2$. By taking advantage of the overall negative charge of $[PMo_{10}V_2O4_{40}]^{5-}$, $PMo_{10}V_2$ catalyst was immobilized on the S-MC support as a charge matching component. It was revealed that $PMo_{10}V_2$ species were finely and molecularly dispersed on the S-MC via chemical immobilization. In the vapor-phase oxidation of benzyl alcohol, $PMo_{10}V_2$/S-MC catalyst showed higher conversion of benzyl alcohol and higher yield for benzaldehyde and benzoic acid than unsupported $PMo_{10}V_2$ catalyst. The enhanced catalytic performance of $PMo_{10}V_2$/S-MC was due to fine dispersion of $PMo_{10}V_2$ species on the S-MC via chemical immobilization.

키워드

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