Heterogeneous Acid Catalyst Screening for Furfural Production from Xylose-Rich Hemicellulose Hydrolysate

Abstract

Furfural is an important bio-based platform chemical widely utilized in the production of fuels, solvents, resins, and value-added industrial intermediates derived from lignocellulosic biomass. The present study investigates the screening of heterogeneous acid catalysts for furfural production from xylose-rich hemicellulose hydrolysate under controlled reaction conditions. The research focuses on evaluating catalytic activity, furfural selectivity, reaction efficiency, and catalyst stability associated with different solid acid catalyst systems. Experimental analysis was conducted to examine the influence of catalyst type, acid site distribution, reaction temperature, residence time, solvent composition, and hydrolysate concentration on xylose dehydration performance and furfural yield. Results demonstrate that heterogeneous acid catalysts effectively promote the conversion of xylose into furfural through acid-catalyzed dehydration mechanisms while facilitating catalyst recovery and reuse. The study further reveals that catalysts possessing strong Brønsted acidity and appropriate pore structure significantly enhance furfural selectivity and reduce the formation of undesired humin byproducts. Optimized operating conditions improved reaction kinetics and product yield while maintaining catalyst structural stability during repeated reaction cycles. Comparative assessment with conventional homogeneous acid systems confirms the advantages of heterogeneous catalysts, including simplified separation, lower corrosion risk, and reduced wastewater generation. In addition, the process demonstrates potential for sustainable biomass valorization and renewable chemical production from agricultural residues and lignocellulosic feedstocks. The findings highlight the effectiveness of heterogeneous acid catalyst systems for furfural synthesis and contribute to the advancement of environmentally sustainable catalytic technologies for biorefinery and green chemical manufacturing applications.