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HomeChemistryA hemicellulose and lignin-first course of for corn stover valorization catalyzed by...

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


A novel hemicellulose and lignin-first course of for corn stover valorization catalyzed by Al2(SO4)3 in GBL/H2O co-solvent was developed on this examine. In 25% GBL/H2O at 160 °C, Al2(SO4)3 assisted H2O in breaking down intermolecular linkages of corn stover. The hydrolysis of Al2(SO4)3 may produce H+, [Al(OH)2(H2O)x]+ and SO42-. With the solvation of GBL, the H+ and [Al(OH)2(H2O)x]+ from Al2(SO4)3 hydrolysis elevated the co-conversion and dissolution of hemicellulose (96.9 wt%) and lignin (68.0 wt%), whereas the AlHSO4(OH)2H2O species fashioned by combining with [Al(OH)2(H2O)x]+ and SO42- was discovered to inhibit cellulose conversion (88.7 wt% saved). Anticipating for H+ from Al2(SO4)3 hydrolysis, the fashioned AlHSO4(OH)2H2O was discovered to be the catalytic energetic species for the cleavage of glycosidic bonds in hemicellulose to provide xylose, and in addition acted as a “stabilizer” to forestall the additional degradation of xylose to enhance its yield (87.6%, based mostly on the burden of hemicellulose). Al2(SO4)3 selectively promoted lignin depolymerization to decrease Mw oligomers, in addition to monophenols (11.20%) with excessive selectivity of 70.0% to VG and VP by way of Cα-OH dehydration and -Cγ(=O)-OH decarboxylation response. The obtained cellulose-rich residues present nice potential for additional use inside many industrial processes. The developed course of is recyclable, giving necessary insights to design new approaches for corn stover valorization.

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