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- W4223977456 abstract "Abstract Methyl oleate, an example of a FAME (fatty acid methyl ester), was produced by oleic acid (OA) photoesterification with TiO 2 and UVA light. Different parameters were evaluated and optimised: catalyst pretreatment, temperature (25–65 °C), catalyst loading (1–30 % w/w OA ) and oleic acid : alcohol molar ratio (1 : 3–1 : 55). Response surface quadratic methodology obtained by central composite rotational design (RSM‐CCRD) was used to evaluate the main operational conditions of the photoesterification process. A high conversion of 98 % (±0.8) at 55 °C, 20 % TiO 2 (w/w OA ), and 1(OA) : 55(methanol) molar ratio was achieved. The photoesterification mechanism is furthermore proposed. The Langmuir‐Hinshelwood kinetic model considered the forward and backward reaction as first‐order fits with the best accuracy (R 2 of 0.997). The thermodynamic results (ΔG 338.15K =−20.75 kJ/mol, ΔH=13.75 kJ/mol, and ΔS=0.47 kJ/mol.K) indicate that the operating conditions are important, both to supply the energy requirement of the reaction, but also to increase the miscibility of the reactants." @default.
- W4223977456 created "2022-04-19" @default.
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- W4223977456 date "2022-04-28" @default.
- W4223977456 modified "2023-10-16" @default.
- W4223977456 title "Methyl Oleate Synthesis by TiO<sub>2</sub> Photocatalytic Esterification of Oleic Acid: Optimisation by Response Surface Quadratic Methodology, Reaction Kinetics and Thermodynamics" @default.
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- W4223977456 doi "https://doi.org/10.1002/cptc.202200007" @default.
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