Research progress of hydrodeoxygenation of lignin and its derivatives on metal catalysts supported by microporous molecular sieve

Abstract

Lignin, widely present in nature, is a potential alternative to fossil fuels, and its catalytic conversion into high-value-added chemicals or fuels holds significant application potential. Among various technologies, hydrodeoxygenation (HDO) stands out as one of the most promising approaches for efficient lignin conversion. Microporous molecular sieve supported metal bifunctional catalyst exhibit remarkable advantages in the HDO of lignin model compounds due to their unique pore structures, tunable acidic sites, and metal-support synergistic effects. This review summarizes recent research progress on the HDO of lignin and its derivatives over microporous molecular sieve-supported metal catalysts, with a focus on the role and advantages of microporous molecular sieve as catalyst supports, as well as the influence mechanisms of different metal centers on HDO reaction pathways and product selectivity of lignin derivatives. Finally, the major challenges and future research trends in this field are discussed.