Cellulose conversion for ethyl levulinate (CCEL) production is a potential technology for obtaining liquid fuels. Combined the inherent characteristics of cellulose with “homogeneous reaction-heterogeneous separation” feature of heteropoly acids (HPAs), HPAs catalyzed CCEL under ethanol medium were investigated. Various characterizations confirmed HSiW had appropriate Brønsted and Lewis acid sites. Therefore, HSiW achieved the highest cellulose conversion (95.25 %) and ethyl levulinate (EL) yield (77.05 %), and EL selectivity reached to 75.15 % under optimized reaction conditions. Additionally, the reaction pathways of CCEL were proposed and the reactions of fructose dehydrated into hydroxymethylfurfural (HMF) and further alcoholysis into EL were improved by HPAs. The successfully established kinetic model of CCEL indicated the activation energies of cellulose conversion into HMF (26.90 kJ·mol⁻¹) and HMF alcoholysis for EL (24.22 kJ·mol⁻¹) were significantly lower than those of them transformed to humins (99.19 and 53.68 kJ·mol⁻¹), suggesting HPAs catalysis could effectively inhibit humus generation.

用于乙酰丙酸乙酯 (CCEL) 生产的纤维素转化是获得液体燃料的潜在技术。结合纤维素的固有特性和杂多酸（HPA）的“均相反应-非均相分离”特性，研究了HPA在乙醇介质下催化CCEL。各种表征证实 HSiW 具有适当的 Brønsted 和 Lewis 酸位。因此，HSiW在优化的反应条件下实现了最高的纤维素转化率（95.25%）和乙酰丙酸乙酯（EL）收率（77.05%），EL选择性达到75.15%。此外，还提出了CCEL的反应途径，并通过HPA改善了果糖脱水成羟甲基糠醛（HMF）和进一步醇解成EL的反应。^-1 ) 和HMF 对EL 的醇解(24.22 kJ·mol ^-1 ) 显着低于转化为腐殖质的它们(99.19 和53.68 kJ·mol ^-1 )，表明HPA 催化可以有效抑制腐殖质的产生。