Comparative study of solvolysis of technical lignins in flow reactor

Abstract

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Influence of reaction conditions on solvolysis of organosolv lignin using water and green organic co-solvents as reaction medium

“…Higher amount of 2-MTHF in the reaction medium seemed to promote cross-linking of larger lignin fragments resulting in higher yield of char. Similar effect was observed in earlier studies where alkaline lignin [41] and pine saw dust [9] were solvolyzed in ethanol/water mixture. On the other side, cross-linking occur in smaller lignin fragments when water was in excess in the reaction medium.…”

Combination of Autohydrolysis and Catalytic Hydrolysis of Biomass for the Production of Hemicellulose Oligosaccharides and Sugars

“…Low levels of unknown compounds were detected, which indicates that autohydrolysis is a selective process for extraction of oligosaccharides. The highest content of unknown compounds was found in eucalyptus liquor obtained at 190 • C, with a 5.3 C% yield of unknown compounds; this yield was halved for eucalyptus liquor obtained at 210 • C. It is likely that unknown compounds precipitated at higher temperature, as for example phenolic compounds extracted from lignin can condensate into insoluble materials in harsh conditions [64]. The yield of unknown compounds also depended on the type of biomass, with the following range: eucalyptus > wheat straw > miscanthus.…”

A Landscape of Lignocellulosic Biopolymer Transformations into Valuable Molecules by Heterogeneous Catalysis in C’Durable Team at IRCELYON

“…Preliminary studies in the team consisted in comparing, under neutral atmosphere, the solvolysis of lignins from different origins and extraction methods: a spruce-lignin and a pine-lignin obtained from Kraft processes, a wheat straw-lignin obtained from Soda process, and a wheat-straw lignin obtained from Organosolv (CIMV ® ) process [79]. After full sample characterization by a variety of techniques, solvolysis was studied in EtOH-H 2 O under continuous flow conditions at 225 • C under 8 MPa of N 2 , preventing char and foam formation.…”