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

• Published in: Applied catalysis. A, General General, 2012-09, Vol.437-438, p.72-78
• Main Authors: Gutierrez, Victoria, Dennehy, Mariana, Diez, Alejandra, Volpe, María A.
• Format: Article
• Language: English
• Subjects: Carbon monoxide; Catalysis; Catalysts; CO adsorption; Copper; Copper catalysts; Crotonaldehyde; Hydrogenation; Liquid phases; MCM-48; Selective hydrogenation; Selectivity; Walls
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2012.06.011

[Display omitted] ► Cu/MCM-48 catalysts are prepared and characterized. ► Copper crystals coexists with highly dispersed copper species. ► The Cu/MCM-48 catalysts are selective toward crotyl alcohol.► The catalytic patterns can be explained on the basis of characterization results. 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 2–20wt% 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).