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HWAHAK KONGHAK,
Vol.22, No.1, 25-34, 1984
Vol.22, No.1, 25-34, 1984
여러 가지 혼합 금속 산화물 촉매상에서의 톨루엔의 기상 산화 반응
Gas Phase Oxidation of Toluene on Various Mixed Metal Oxide Catalysts
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 V2O5-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.
It has been found that V2O5-CuO and V2O5-ZnO catalysts have high activity whereas V2O5-Fe2O3 and V2O5-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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