The highly
dispersed supported ruthenium-yttrium (Ru-Y) bimetallic catalysts were prepared
by impregnation method and their catalytic performance for hydrogenation of ester
was fully investigated. The catalyst was characterized by X-ray diffraction and
field emission scanning electron microscopy. The results show that the average
particle diameter of the bimetallic crystallites was less than 10 nm. The
effects of the reaction temperature, the hydrogen pressure, the amount of catalyst
and the proportion of yttrium in catalyst on the hydrogenation of ester were studied.
The experimental results show that the introduction of yttrium not only changed
the chemical and textural properties of ruthenium-based catalyst but also controlled
the formation of Ru-Y alloy. The Ru-Y catalyst (Ru-2%Y/TiO2) exhibited
high catalytic activity and good selectivity towards the higher alcohols. Under
optimal reaction conditions of 240°C and 5 MPa hydrogen pressure, the
conversion of palm oil esters was above 93.4% while the selectivity towards
alcohol was above 99.0%.
References
[1]
Weissermel, K. and Arpe, H.-J. (1994) Industrielle Organische Chemie. 4th Edition, VCH Verlagsgesellschaft mbH, Deerfield Beach.
[2]
Echeverri, D.A., Marín, J., Restrepo, G. and Riso, L. (2009) Characterization and Carbonylic Hydrogenation of Methyl Oleate over Ru-Sn/Al2O3: Effects of Metal Precursor and Chlorine Removal. Applied Catalysis A: General, 366, 342-347. http://dx.doi.org/10.1016/j.apcata.2009.07.029
[3]
Yuan, P., Liu, Z.Y., Sun, H.J. and Liu, S.C. (2010) Influence of Calcination Temperature on the Performance of Cu-Al-Ba Catalyst for Hydrogenation of Esters to Alcohols. Acta Physico-Chimica Sinica, 26, 2235-2241. http://dx.doi.org/10.3866/PKU.WHXB20100642
[4]
Figueiredo, F.C.A., Jordao, E. and Carvalho, W. (2008) Adipic Ester Hydrogenation Catalyzed by Platinum Supported in Alumina, Titania and Pillared Clays. Applied Catalysis A: General, 351, 259-266. http://dx.doi.org/10.1016/j.apcata.2008.09.027
[5]
He, L., Li, X., Lin, W., Cheng, H., Yu, Y., Fujita, S., Arai, M. and Zhao, F. (2014) The Selective Hydrogenation of Ethyl Stearate to Stearyl Alcohol over Cu/Fe Bimetallic Catalysts. Journal of Molecular Catalysis A: Chemical, 392, 143-149. http://dx.doi.org/10.1016/j.molcata.2014.05.009
[6]
Vigier, K., Pouilloux, Y. and Barrault, J. (2012) High Efficiency CoSn/ZnO Catalysts for the Hydrogenation of Methyl Oleate. Catalysis Today, 195, 71-75. http://dx.doi.org/10.1016/j.cattod.2012.04.027
[7]
Zheng, J., Lin, H., Wang, Y., Zheng, X., Duan, X. and Yuan, Y. (2013) Efficient Low-Temperature Selective Hydrogenation of Esters on Bimetallic Au-Ag/SBA-15 Catalyst. Journal of Catalysis, 297, 110-118. http://dx.doi.org/10.1016/j.jcat.2012.09.023
