Izvorni znanstveni članak
Effect of Calcination Temperature on Catalytic Activity of Synthesis SrO/S-ZrO2 by Solvent-free Method in Esterification of Oleic Acid
H. Nayebzadeh
; Department of Chemical Engineering, Ferdowsi University of Mashhad, Marshad, Iran
N. Saghatoleslami
; Department of Chemical Engineering, Ferdowsi University of Mashhad, Marshad, Iran
A. Maskooki
; Department of Food Technology, Khorasan Research Institute for Food Science and Technology, Mashhad, Iran
B. R. Vahid
; Department of Chemical Engineering, Ferdowsi University of Mashhad, Marshad, Iran
Sažetak
Currently, the major concern in production of biodiesel fuel is to exploit new catalysts with the optimal conditions. In this study, the effect of calcination temperature on the synthesis of 20 mol % SrO/S-ZrO2 was examined by solvent-free method. Moreover,
the ability of the catalyst for esterification reaction of oleic acid with methanol was also assessed. To obtain this objective, X-ray diffraction and infra-red spectroscopy method was employed to characterize the structure of the catalysts. The results of this study reveal that the calcined strontium oxide promoted sulfated zirconia at 500 °C has the highest percentage of tetragonal phases of zirconia. It has also been demonstrated that owing to the high percentage of the tetragonal phases of zirconia and the acidity of the catalyst,
conversion of oleic acid to fatty acids methyl esters (i.e., FAME) could be enhanced from 88.36 % to 91.13 %. Moreover, it has also been shown that 20 mol % SrO/S-ZrO2 exhibits higher activity in comparison with S-ZrO2 at 500 °C in esterification reaction due to
the presence more sulfate ions and higher activity of strontium ions.
Ključne riječi
Solvent-free; strontium; sulfated zirconia; calcination temperature; esterification
Hrčak ID:
108941
URI
Datum izdavanja:
30.9.2013.
Posjeta: 1.959 *