The decomposition of levulinic acid (LA) is a critical factor limiting the yield of LA produced by biomass hydrolysis. In this study, the effects of influencing factors, especially furfural, on the decomposition of LA were investigated. Results show that furfural, as a hemicellulose hydrolysis product, led to an increase in LA decomposition; 25.3% of LA decomposed when furfural concentration was 0.3 mol/L at 200 °C. Furthermore, sulfuric acid, as a hydrolysis catalyst, was found to have a synergistic effect with furfural on LA decomposition, giving a maximum promotion of 9.86% on LA decomposition compared with the effect of acid or furfural alone. A kinetic model of LA decomposition considering the synergistic effect of furfural and acid concentration was established, and the activation energy of LA decomposition was found to be 34.46 kJ/mol.

中文翻译：

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糠醛和硫酸对乙酰丙酸分解的协同作用

乙酰丙酸（LA）的分解是限制由生物质水解产生的LA的产率的关键因素。在这项研究中，研究了影响因素，尤其是糠醛对LA分解的影响。结果表明，糠醛作为半纤维素水解产物导致了LA分解的增加。当糠醛浓度在200°C时为0.3 mol / L时，LA分解为25.3％。此外，发现硫酸作为水解催化剂与糠醛对LA分解具有协同作用，与单独的酸或糠醛的作用相比，对LA分解具有9.86％的最大促进作用。建立了糠醛与酸浓度协同作用的LA分解动力学模型，发现LA分解的活化能为34.46 kJ / mol。