Microwave assisted transesterification of waste frying oil and concentrate methyl ester content of biodiesel by molecular distillation
2013
Azcan, Nezihe | Yilmaz, Ozlem
In this study, microwave assisted transesterification of waste frying oil was carried out in the presence of sodium methoxide (NaOCH₃). Parametric studies were performed to investigate suitable reaction conditions such as catalyst amount (0.5–0.75–1.0–1.5wt.%), reaction time (3–5–7–9min), temperature (55–60–65°C), and oil:methanol ratio (1:4–1:5–1:6). Methyl ester content of biodiesel was determined as 90.04–98.85%. Methyl ester content of biodiesel was increased from 90.04% to 97.74% by molecular distillation at 170–200°C, 10mbar and 0.12–0.24mL/min feed flow rate. Optimum distillation conditions were determined as 0.18mL/min feed flow rate and 170°C evaporator temperature by using 4×3 factorial design.
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