Tungsten oxide zirconia as solid superacid catalyst for esterification of waste acid oil (dark oil).
Biodiesel is a renewable fuel which can be produced through an esterification reaction. The cost of feedstock which resulted in that of biodiesel is a large problem to be resolved. Dark oil from industrial process can be a better alternative for biodiesel production because of its low price. In spite of this, the study of biodiesel production using the dark oil has not been reported. This study provides technical information and catalytic properties on this system. Among the several catalysts, WO(3)/ZrO(2) catalyst was the most effective catalyst in the esterification of the dark oil to fatty acid methyl esters (FAMEs). The catalytic reaction parameters were optimized that 20 wt.% WO(3)/ZrO(2) has a high FFA conversion of 96% at 150 degrees C, 0.4 g/ml (oil), 1:9 (oil to alcohol, molar ratio) and 2h reaction time. The physical and chemical properties of the catalyst were characterized by XRD, Raman spectrometer, BET and NH(3)-TPD.
Park
Young-Moo
YM
Department of Chemical and Biological Engineering, Korea University, 5-1, Anam-dong, Sungbuk-ku, Seoul 136-701, Republic of Korea.
Chung
Sang-Ho
SH
Eom
Hee Jun
HJ
Lee
Jin-Suk
JS
Lee
Kwan-Young
KY
D000143:Acids / Q000737:chemistry*; D055162:Biocatalysis; D004951:Esterification; D010087:Oxides / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*; D014961:X-Ray Diffraction; D015040:Zirconium / Q000737:chemistry*
D000143:Acids; D010087:Oxides; C511604:tungsten oxide; D015040:Zirconium; C028541:zirconium oxide; D014414:Tungsten