کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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684916 | 889029 | 2008 | 6 صفحه PDF | دانلود رایگان |
Two sulfated zirconias were synthesized and characterized by X-ray diffraction and infrared spectroscopy. They were used as catalysts in the alcoholysis of soybean oil and in the esterification of oleic acid. Using sulfated zirconia prepared by the solvent-free method (S–ZrO2) as catalyst, the alcoholysis conversions of soybean oil under optimized conditions (120 °C, 1 h and 5 wt% of catalyst) were 98.6% (methanolysis) and 92% (ethanolysis), respectively. The esterification of oleic acid with methanol was complete after 2 h. Zirconia sulfated by standard methods (SZ) had low activity in the methanolysis of soybean oil (conversion of 8.5%) and conventional zirconia (NS) was inactive for methanolysis under the conditions optimized for S–ZrO2.
Journal: Bioresource Technology - Volume 99, Issue 14, September 2008, Pages 6608–6613