Effect of Hydrothermal Pretreatment on Kitchen Waste for Biodiesel Production Using Alkaline Catalyst

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• 作者：Chunming Wang ; Senyang Xie ; Meixin Zhong
• 关键词：Waste cooking oil ; Hydrothermal pretreatment ; Biodiesel productivity ; Alkaline catalyst ; Sodium methoxide
• 刊名：Waste and Biomass Valorization
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：8
• 期：2
• 页码：369-377
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Engineering, general; Environment, general; Renewable and Green Energy; Industrial Pollution Prevention; Waste Management/Waste Technology; Environmental Engineering/Biotechnology;
• 出版者：Springer Netherlands
• ISSN：1877-265X
• 卷排序：8

文摘

The catalyzed conversion of waste cooking oil by transesterification into biodiesel yields exceptional environmental benefits and is the focus of this study. Sodium methoxide (CH₃ONa), an alkaline catalyst, was selected for transesterification. A hydrothermal pretreatment was first applied to heat the kitchen waste to 140–170 °C. The pretreated waste cooking oil was then extracted from kitchen waste after a set time for use as a reactant. The aim of this study was to discuss whether hydrothermal pretreatment affects biodiesel productivity of waste cooking oil by alkali catalyst. Transesterification was conducted following hydrothermal pretreatment. Transesterification conditions were obtained from results of single factor experiments at 60 °C for 80 min, 0.9 wt% sodium methoxide concentration and 5:1 methanol/oil molar ratio. Maximum transesterification productivity reached 80.9 % locating the maximum increment of biodiesel productivity at 2.88 wt% relative to the control obtained under hydrothermal conditions at 160 °C for 80 min and a 1:1 volume ratio of kitchen waste to water. Biodiesel productivity was not impacted by hydrothermal temperature or hydrothermal time and analysis indicates principal properties of the final product complied with the European EN14214 Standard.