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여러 가지 혼합 금속 산화물 촉매상에서의 톨루엔의 기상 산화 반응

Gas Phase Oxidation of Toluene on Various Mixed Metal Oxide Catalysts

이근대 이호인

Lee GD Lee HI

HWAHAK KONGHAK, February 1984, 22(1), 25-34(10), NONE

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Abstract

여러 가지 혼합 금속 산화물 촉매상에서 toluene으로부터 benzaldehyde로의 기상 산화반응을 연구하였다. 모든 촉매에 있어서 V₂O₅가 주촉매로 사용되었으며, 또 다른 여러 가지 전이금속 산화물이 조촉매로 선택되어졌다. 각 촉매의 물리적 성질과 활성을 조사하였다. 생성물은 기체크로마토그래피로 분석하였으며 주생성물은 benzaldehyde와 CO₂이었다. V₂O₅-CuO와 V₂O₅-ZnO촉매가 높은 활성을, 반면에 V₂O₅-Fe₂O₃와 V₂O₅-Cr₂O₃가 비교적 낮은 활성을 지닌 것으로 나타났다. 또한 V₂O₅-CuO, V₂O₅-ZnO가 toluene의 부분산화에 의한 benzaldehyde로의 선택도를 증가시키는 경향을 보이는 반면, V₂O₅-Cr₂O₃, V₂O₅-MoO₃, V₂O₅-WO₃ 등이 toluene의 완전산화에 의한 CO₂로의 선택도를 증가시키는 경향을 나타내었다.

Vapour phase oxidation of toluene to benzaldehyde was studied on various mixed metal oxide catalysts. For all catalysts, vanadium pentoxide was used as a main catalyst and some transition metal oxides were selected as co-catalysts. The physical properties and activity of each catalyst have been investigated. The products were analyzed by gas chromatography and the main products were benzaldehyde and carbon dioxide.
It has been found that V₂O₅-CuO and V₂O₅-ZnO catalysts have high activity whereas V₂O₅-Fe₂O₃ and V₂O_5-Cr₂O₃ relatively low one. It is also observed that V₂O₅-CuO and V₂O₅-ZnO show a trend to enhance the selectivity of benzaldehyde due to prevailing partial oxidation, whereas V₂O₅-Cr₂O₃, V₂O₅-MoO₃ and V₂O₅-WO₃ show a trend to enhance that of carbon dioxide, which suggests that complete oxidation of toluene occurs mainly on these catalysts.

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