Role of preparation parameters on the structure–selectivity properties of MoO₃/Al₂O₃ catalysts for the oxidative dehydrogenation of ethane

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• 作者：E. Heracleous ; J. Vakros ; A. A. Lemonidou ; Ch. Kordulis
• 刊名：Catalysis Today
• 出版年：2011
• 出版时间：2011
• 年：2011
• 卷：91-92
• 期：Complete
• 页码：289-292
• 全文大小：82 K

文摘

Two MoO₃/γ-Al₂O₃ catalysts containing 11 % (w/w) MoO₃ prepared by equilibrium-deposition-filtration at two different pairs of pH and Mo concentration values (pH=3.9, C_Mo=1.1×10⁻³ mol L⁻¹ and pH=6.3, C_Mo=2.7×10⁻² mol L⁻¹) were studied for the ethane oxidative dehydrogenation.

The two catalysts demonstrated similar ethane conversions in a temperature range 450–600 °C. Selectivity to ethene was 15 % higher for the catalyst prepared at relatively low pH than for the sample prepared at a higher pH. The observed difference in ethylene selectivity was related to the different structural characteristics of the molybdena phase in the two catalysts.