Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Oxidative Dehydrogenation of 1-butene over BiFe0.65MoP0.1 Catalyst: Effect of Phosphorous Precursors

BiFe0.65MoP0.1 촉매 상에서 1-부텐의 산화탈수소화 반응 : 인 전구체의 영향

  • Park, Jung-Hyun (Department of Chemical Engineering, Chungbuk National University) ;
  • Youn, Hyun Ki (Industry-University Cooperation Foundation, Chungbuk National University) ;
  • Shin, Chae-Ho (Department of Chemical Engineering, Chungbuk National University)
  • Received : 2015.07.07
  • Accepted : 2015.10.07
  • Published : 2015.12.01
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Abstract

The influence of phosphorous precursors, $NH_4H_2PO_4$, $(NH_4)_2HPO_4$, $H_3PO_4$, $(C_2H_5)_3PO_4$, and $P_2O_5$, on the catalytic performance of the $BiFe_{0.65}MoP_{0.1}$ catalysts in the oxidative dehydrogenation of 1-butene to 1,3-butadiene was studied. The catalysts were characterized by XRD, $N_2$-sorption, ICP, SEM and TPRO analyses. It was not observed big difference on the physical properties of catalysts in accordance with used different phosphorous precursors, however, the catalytic performance was largely depended on the nature of the phosphorous precursors. Of various precursors, the $BiFe_{0.65}MoP_{0.1}$ oxide catalyst, which was prepared from a phosphoric acid precursor, showed the best catalytic performance. Conversion and yield to butadiene of the catalyst showed 79.5% and 67.7%, respectively, after 14 h on stream. The cation of phosphorous precursors was speculated to affect the lattice structure of the catalysts during catalyst preparation and this difference was influenced on the re-oxidation ability of the catalysts. Based on the results of TPRO, it was proposed that the catalytic performance could be correlated with re-oxidation ability of the catalysts.

1-부텐의 산화탈수소화에서 다양한 인 전구체가 촉매의 반응활성에 미치는 영향을 조사하기 위하여 $BiFe_{0.65}MoP_{0.1}$ 산화물 촉매를 모델 촉매로 선정하여 인산수소암모늄, 인산수소이암모늄, 인산, 트리에틸인산, 오산화인 등의 인 전구체를 사용하어 촉매를 제조하고 산화탈수소화 반응을 수행하였다. 제조한 촉매의 물리 화학적 특성을 알아보기 위하여 X-선 회절분석(XRD), 질소 흡착 탈착분석($N_2$ sorption), 원소분석(ICP), 전자주사현미경(SEM), 승온재산화분석(TPRD) 등의 특성분석을 수행하였다. 제조한 촉매의 물리적 특성은 인 전구체에 따른 큰 차이는 관찰되지 않았지만 산화탈수소화 반응에서 촉매의 활성은 사용된 인 전구체의 특성에 따라 다르게 관찰되었다. 인산을 전구체로 사용하여 제조한 $BiFe_{0.65}MoP_{0.1}$ 산화물 촉매가 사용된 촉매 중에서 가장 우수한 활성을 나타내었으며, 14시간 동안의 산화탈수소화 반응기준으로 n-부텐의 전환율은 79.5%, 1,3-부타디엔 수율은 67.7%의 수치를 보였다. 인 전구체의 양이온의 특성에 따라 촉매의 격자 구조가 영향을 받는 것으로 추측되며, 이러한 격자 구조의 차이는 촉매의 재산화 능력에 영향을 주는 것으로 사료된다. 환원 처리된 촉매의 승온재산화 실험으로부터 촉매의 반응활성은 촉매의 재산화 능력과 밀접하게 관련이 있었으며, 인산을 전구체로 사용하여 제조한 산화물 촉매가 다른 인 전구체와 비교하여 가장 좋은 재산화 능력을 나타내었다.

Keywords

References

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