Mild Dealumination of H-ZSM-5 Zeolite for Enhanced Conversion of Glucose into 5-Hydroxymethylfurfural in a Biphasic Solvent System

Transformation of lignocellulosic biomass into high-value chemicals is a viable strategy for sustainable development bio-based economy. 5-Hydroxymethylfurfural (HMF) one potential platform bio-chemicals the manufacture various renewable products. In this work, commercial H-ZSM-5 zeolite was used as starting material preparing series acid catalysts with bifunctionality direct dehydration glucose to HMF in biphasic water/tetrahydrofuran system. The pristine mildly dealuminated by refluxing dilute nitric solutions adjust its properties. Although treatment slightly altered elemental composition, textural properties, and morphology zeolite, total acidity distribution sites were significantly modified. Some non-framework aluminum (Al) oxide clusters removed from parent simultaneously partial hydrolysis zeolitic framework. An increased fraction coordinatively unsaturated framework Al species enhanced number Lewis sites. Using 0.1 M solution provided suitable catalyst (0.1DeAl.H-ZSM-5), giving conversion yield >99% 64.7%, respectively, good reusability under optimized reaction conditions. These results show industrial proposed method simple but efficient preparation producing via catalytic glucose.