Production of Biodiesel from Waste Cooking Oil via a Two-Step Catalyzed Process and Molecular Distillation

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• 作者：Yong Wang ; Jieyu Nie ; Mouming Zhao ; Shun Ma ; Lina Kuang ; Xue Han ; Shuze Tang
• 刊名：Energy & Fuels
• 出版年：2010
• 出版时间：March 18, 2010
• 年：2010
• 卷：24
• 期：3
• 页码：2104-2108
• 全文大小：681K
• 年卷期：v.24,no.3(March 18, 2010)
• ISSN：1520-5029

文摘

In this work, a two-step catalyzed process was developed to produce biodiesel from waste cooking oil (WCO). First, free fatty acid (FFA) of the WCO with an acid value of 66.40 ± 1.08 mg KOH/g was esterified with methanol catalyzed by polyferric sulfate (PFS). Second, the esterified WCO was transesterified with methanol catalyzed by potassium hydroxide to produce crude biodiesel. The crude biodiesel was purified by molecular distillation to produce purified biodiesel (fatty acid methyl ester, FAME). The highest yield of FAME by molecular distillation from the crude biodiesel was 98.32% ± 0.17% at an evaporator temperature of 120 °C. PFS was removed efficiently from the esterified WCO by washing water after the recovery of methanol. The results revealed that this two-step process using a polyferric sulfate catalyst and molecular distillation is probably a promising method for the conversion of WCO.