ArticleRSC advances2025
Rapid reductive catalytic fractionation for holistic valorization of lignocellulose through precise acid tuning and temporal window identification.
Article in RSC advances, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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9 authors.
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Abstract
Reductive catalytic fractionation (RCF) is an effective technique that enables lignin depolymerization into aromatic monomers while preserving cellulose for downstream valorization. However, the typically prolonged reaction durations (>3 h) required for conventional RCF, stemming from slow kinetics of lignin extraction and depolymerization, impeding its industrial scalability. This study systematically investigated solvent composition, acid concentration, and reaction parameters to accelerate RCF kinetics and modulate monomer distribution. Through rapid benchmark reactions measured immediately at target temperature (0 h) using Ni/C, we demonstrated that a phosphoric acid-assisted RCF process in ethanol-water solvent achieves efficient lignin depolymerization. Remarkably, by finely tuning the acid concentration in the reaction system, this approach achieved a high monomer yield of 31% at 0 h, with a remarkably high production efficiency of 3.44 mg monomers per g lignin per min, exceeding most previously reported rates. Time course analysis further established that precise acid tuning and identifying the optimal temporal window are critical for maximizing monomer yield while preserving carbohydrates. Under optimized conditions employing 0.3 wt.‰ H
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