Upgrading bio-oil from waste cooking oil by esterification using SO42−/ZrO2 as catalyst. (15th September 2020)

• Record Type: Journal Article
• Authors: Yu, Shitao; Wu, Shasha; Li, Lu; Ge, Xiaoping
• Is Part Of: Fuel. Volume 276(2020)
• Publication Date: 2020-09-15
• Subjects: Bio-oil -- Waste cooking oil -- Free fatty acids -- SO42−/ZrO2 -- Esterification -- Kinetics; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2020.118019
• Languages: English
• ISSNs: 0016-2361

Abstract

Abstract: High-acid value of bio-oil from biomass is the important reason to restrict its application. Here acid value of bio-oil from waste cooking oils (WCO) was decreased by methyl esterification with the FFAs (Free Fatty Acids) in the bio-oil using SO4 2- /ZrO2 as a solid acid catalyst. The acid value of the esterification product decreased to 3 mg KOH g −1, and both the kinematic viscosity and the density reached the 0 # diesel standard. Other properties were superior to traditional biodiesel, and the obtained product could be used as a diesel with good performance. The activity and reusability of the SO4 2− /ZrO2 have been studied and the results suggested that the rate of esterification was 96.15% and more than 90% in the fifth esterification. Then kinetics of the reaction has been studied; revealing it to be a zero-order reaction when the methanol is excessive.