title: The correlation between cellulose allomorphs (I and II) and conversion after removal of hemicellulose and lignin of lignocellulose.
abstract: H2SO4, NaOH and H3PO4 were applied to decompose lignocellulose samples (giant reeds, pennisetum and cotton stalks) to investigate the correlation between cellulose allomorphs (cellulose I and II) and conversion of cellulose. The effect of removal of hemicellulose and lignin on the surface morphology, crystallinity index (CrI), cellulose allomorphs (cellulose I and II), and enzymatic hydrolysis under different pretreatments was also studied. CrI caused by H3PO4 pretreatment reached 11.19%, 24.93% and 8.15% for the three samples, respectively. Corn stalk showed highest conversion of cellulose among three samples, irrespective of the pretreatment used. This accounted for the widely use of corn stalk as the renewable crop substrate to synthesize biofuels like ethanol. CrI of cellulose I (CrI-I) negatively affects cellulose conversion but CrI of cellulose II (CrI-II) positively affects cellulose conversion. It contributes to make the strategy to transform cellulose I to cellulose II and enhancing enzymatic hydrolysis of lignocellulose.
authors.affiliation: Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Yanliang
authors.initials: Y
authors.lastname: Song
authors.affiliation: Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Jingzhi
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Tianwei
authors.initials: T
authors.lastname: Tan
mesh_terms: D056804:Biofuels; D002482:Cellulose / Q000737:chemistry*; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D010756:Phosphoric Acids / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry; D013464:Sulfuric Acids / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry
chemical_list: D056804:Biofuels; D010756:Phosphoric Acids; D011134:Polysaccharides; D013464:Sulfuric Acids; C036909:lignocellulose; D012972:Sodium Hydroxide; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin; C030242:phosphoric acid
keywords: Cellulose allomorphs; Crystallinity; Depolymerization; Enzymatic hydrolysis; Lignocellulose