title: Fractionation of bamboo culms by autohydrolysis, organosolv delignification and extended delignification: understanding the fundamental chemistry of the lignin during the integrated process.
abstract: Bamboo (Phyllostachys pubescens) was successfully fractionated using a three-step integrated process: (1) autohydrolysis pretreatment facilitating xylooligosaccharide (XOS) production (2) organosolv delignification with organic acids to obtain high-purity lignin, and (3) extended delignification with alkaline hydrogen peroxide (AHP) to produce purified pulp. The integrated process was comprehensively evaluated by component analysis, SEM, XRD, and CP-MAS NMR techniques. Emphatically, the fundamental chemistry of the lignin fragments obtained from the integrated process was thoroughly investigated by gel permeation chromatography and solution-state NMR techniques (quantitative (13)C, 2D-HSQC, and (31)P-NMR spectroscopies). It is believed that the integrated process facilitate the production of XOS, high-purity lignin, and purified pulp. Moreover, the enhanced understanding of structural features and chemical reactivity of lignin polymers will maximize their utilizations in a future biorefinery industry.
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 10083, PR China.
authors.forename: Jia-Long
authors.initials: JL
authors.lastname: Wen
authors.forename: Shao-Ni
authors.initials: SN
authors.lastname: Sun
authors.forename: Tong-Qi
authors.initials: TQ
authors.lastname: Yuan
authors.forename: Feng
authors.initials: F
authors.lastname: Xu
authors.forename: Run-Cang
authors.initials: RC
authors.lastname: Sun
mesh_terms: D031723:Bambusa / Q000737:chemistry* / Q000187:drug effects; D005591:Chemical Fractionation / Q000379:methods*; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008970:Molecular Weight; D009930:Organic Chemicals / Q000494:pharmacology*; D018547:Plant Stems / Q000737:chemistry* / Q000187:drug effects; D012997:Solvents / Q000494:pharmacology*; D014961:X-Ray Diffraction
chemical_list: D009930:Organic Chemicals; D012997:Solvents; D008031:Lignin
keywords: Autohydrolysis; Lignin; Organosolv delignification; Structural analysis; β-O-4 Linkages