Liquid phase hydrogenation of crotonaldehyde over copper incorporated in MCM-48

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• 作者：Victoria Gutierrez ; Mariana Dennehy ; Alej ; ra Diez ; Mar¨ªa A. Volpe
• 关键词：Copper catalysts ; MCM-48 ; Crotonaldehyde ; CO adsorption ; Selective hydrogenation
• 刊名：Applied Catalysis A: General
• 出版年：2012
• 出版时间：26 September, 2012
• 年：2012
• 卷：437-438
• 期：Complete
• 页码：72-78
• 全文大小：641 K

文摘

A series of Cu/MCM-48 catalysts is studied for the liquid phase hydrogenation of crotonaldehyde. Copper is incorporated in MCM-48 following a classical hydrothermal synthesis or by wet impregnation of the MCM-48 precursor (before eliminating the directing agent) with Cu(AcAc)₂. The copper loading is in the 2-20 wt % range. Characterization results from TPR and XRD indicate that copper crystals supported on MCM-48 surface coexist with copper incorporated in the MCM-48 walls. The presence of Cu⁺ in MCM-48 is concluded from characterization with FTIR of adsorbed CO. This species would be the responsible for the relatively high selectivity of Cu/MCM-48. These catalysts show approximately 50 % of selectivity against 7 % of Cu/SiO₂ (both values measured at 10 % of conversion).