کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
688035 | 1460082 | 2015 | 6 صفحه PDF | دانلود رایگان |
• Hydrodynamic cavitation resulted in significant process intensification.
• Waste cooking oil is a sustainable feedstock for biodiesel production.
• The properties of the produced fuel met EN 14214 and ASTM D 6751.
ABSTRACTThis paper investigates a new route for intensification of methyl ester synthesis in Malaysia via alkali-catalysed transesterification of waste cooking oil derived from palm olein using a hydrodynamic cavitation reactor. The effects of the oil to methanol molar ratio (1:4–1:7), catalyst loading concentration (0.5–1.25 wt%) and reaction temperature (50–65 °C) have been investigated using an optimised plate with 21 holes of 1 mm diameter and an inlet pressure of 2 bar in a 50 L of hydrodynamic cavitation reactor assisted by a double diaphragm pump. Optimal conversion of 98.1% was achieved in 15 min in a hydrodynamic cavitation reactor with 1:6 molar ratio of oil to methanol, 1 wt% of catalyst and 60 °C of reaction temperature. It has been observed that a significant reduction in the optimum reaction time (about 6 fold) for transesterification from 90 min for mechanical stirring approach to 15 min for the hydrodynamic cavitation approach. Optimal yield efficiency of 12.50 × 10−4 g/J was found using hydrodynamic cavitation and it was 8 fold higher than 1.5 × 10−4 g/J when mechanical stirring was used.
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Journal: Chemical Engineering and Processing: Process Intensification - Volume 95, September 2015, Pages 235–240