Esterification of free fat acids from waste cooking oil using BiVO4 photocatalysts under visible irradiation

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-02-19 DOI:10.1007/s11144-025-02808-0

Camilo Aurélio Brandão Crisóstomo, Fernanda Barbosa Damaceno, João Paulo de Mesquita, Juliana Arriel Torres, Caue Ribeiro, Roberto Ananias Ribeiro, Osmando F. Lopes, Waldir Avansi Jr., Jânio Santos Almeida, Henrique Aparecido de Jesus Loures Mourão

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Abstract

Herein, we report the FFA photoesterification of waste cooking oil (WCO) using a BiVO₄ and visible irradiation. Despite undergoing treatments under different temperatures (120 °C and 150 °C), both synthesized samples presented high crystallinity and similar morphologies, corresponding to a mixture composed of the scheelite structure of monoclinic and tetragonal phases of BiVO₄. The FFA conversions with the photocatalysts were significantly higher than the non-catalytic reactions. The gas chromatography analysis shows that the products are composed of a mixture of ethyl esters and a low amount of fatty acid ethyl esters (FAEE). The results demonstrate that the photoesterification of FFA of non-edible vegetable oils can be driven by BiVO₄ photocatalysts under visible irradiation, at regular temperature, reduced ethanol/oil molar ratio, and short times.

Graphical Abstract

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可见光照射下BiVO4光催化剂催化废食用油中游离脂肪酸酯化

在此，我们报道了使用BiVO4和可见光照射的废食用油（WCO）的FFA光酯化反应。尽管在不同温度（120℃和150℃）下处理，两种合成的样品均具有较高的结晶度和相似的形貌，对应于BiVO4的单斜相和四方相白钨矿结构的混合物。在光催化剂作用下，FFA的转化率明显高于非催化反应。气相色谱分析表明，产物由乙酯和少量脂肪酸乙酯（FAEE）的混合物组成。结果表明，BiVO4光催化剂可在可见光照射下、在常温、降低乙醇/油摩尔比、短时间下催化非食用植物油中游离脂肪酸的光酯化反应。图形抽象

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.