An integrated process for the valorization of corn stover promoted by NaCl in a GVL/H₂O system

Abstract

An integrated green process for the valorization of corn stover promoted by NaCl in GVL/H2O was developed. With the addition of NaCl in 25% GVL/H2O at 170 °C for 2...

A hemicellulose and lignin-first process for corn stover valorization catalyzed by aluminum sulfate in γ-butyrolactone/water co-solvent

“…GVL is also a biomass-derived green solvent that has similar properties as GBL. In the previous work, 31 GVL contents in GVL/H 2 O system showed a significant effect on the transformation of corn stover, and reached a maximum of 46.4% in 25% GVL/H 2 O. In terms of corn stover transformation, GBL/H 2 O outperformed the above three co-solvent systems.…”

“…The change of GBL or GVL contents in solvent systems, on the other hand, increased the co-conversion and dissolution of hemicellulose and lignin. It was previously reported that 25% GVL /H 2 O gave notably higher hemicellulose (74.4%) and lignin (51.4%) removal, while 89.5% cellulose was kept intact at 160 °C for 2 h. 31 Compared to GVL, GBL exhibited better performance on the simultaneous removal of hemicellulose and lignin (Fig. 1(B)).…”

“…In accordance with the work of Liu et al, 45 previous work also found that the cleavage of β-O-4′ linkages from lignin followed by the dehydration of C α -OH could produce VG and VP. 31 According to GC-FID, 2D HSQC NMR and ESI-MS results, Al 2 (SO 4 ) 3 promoted the cleavage of β-O-4′ linkages followed by C α -OH dehydration and -C γ (vO)-OH decarboxylation reaction from lignin-derived oligomers to produce VG and VP (Fig. 3(C)).…”

“…The measurement conditions were set according to previous work. 31 Before analysis, the liquid fraction obtained after treatment with GBL/ H 2 O co-solvent was subjected to a rotary evaporator to remove water at 50 °C. 21 The contents of monophenols were quantified using benzyl alcohol (0.5 mg mL −1 ) as an internal standard.…”

Upcycling agro-industrial blueberry waste into platform chemicals and structured materials for application in marine environments

“…The process flexibility enhances the techno-economic viability and considers the demands at different levels of the value chain. 24,25 Related approaches have been proposed to valorize agro-industrial residues such as corn stover, 26 sugarcane, 27 marine, 25 and farming 28 waste. The valorization strategy considers two alternatives: GVL solvolysis in the first conversion stage, followed by the thermal valorization of solids via fast pyrolysis at 500 °C to produce different liquid fractions rich in sugars, phenols, and furanics.…”