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Issue 46, 2014
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Selective dissociation and conversion of hemicellulose in Phyllostachys heterocycla cv. var. pubescens to value-added monomers via solvent-thermal methods promoted by AlCl3

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Abstract

Selective dissolution of hemicellulose from Phyllostachys heterocycla cv. var. pubescens (shortened to pubescens afterwards), and conversion of dissolved hemicellulose into value-added monomers (such as furfural and levulinic acid) promoted by AlCl3 under solvent-thermal conditions were investigated. Solid biomass samples were characterized by chemical titration and XRD techniques. Liquid products were analyzed by GC-FID, HPLC, and GPC. In the AlCl3 promoted dissociation of hemicellulose from pubescens, the conversion of hemicellulose reached 72.6 wt% without significant degradation of cellulose and lignin (only 10.4 wt% and 13.3 wt%, respectively) after hydrothermal treatment at a rather low temperature of 120 °C for 4 h. The extracted hemicellulose could be divided mainly into two parts, that is, monomers (such as xylose, furfural and acetic acid, about 36.1%) and oligomers (about 63.9%). THF and SiO2 were added, forming a SiO2–AlCl3–H2O/THF system, for the further conversion of the oligomers and monomers derived from hemicellulose. The selectivity towards total monomers could reach 97.6% based on the converted pubescens. High selectivity towards value-added monomers (39.1% furfural and 48.3% levulinic acid) was obtained at 160 °C.

Graphical abstract: Selective dissociation and conversion of hemicellulose in Phyllostachys heterocycla cv. var. pubescens to value-added monomers via solvent-thermal methods promoted by AlCl3

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Publication details

The article was received on 13 Mar 2014, accepted on 23 May 2014 and first published on 23 May 2014


Article type: Paper
DOI: 10.1039/C4RA02209B
Citation: RSC Adv., 2014,4, 24194-24206
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    Selective dissociation and conversion of hemicellulose in Phyllostachys heterocycla cv. var. pubescens to value-added monomers via solvent-thermal methods promoted by AlCl3

    Y. Luo, L. Hu, D. Tong and C. Hu, RSC Adv., 2014, 4, 24194
    DOI: 10.1039/C4RA02209B

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