title: Preparation of levoglucosenone through sulfuric acid promoted pyrolysis of bagasse at low temperature.
abstract: Fast pyrolysis of bagasse pretreated by sulfuric acid was conducted in a fixed bed reactor to prepare levoglucosenone (LGO), a very important anhydrosugar for organic synthesis. The liquid yield and LGO yield were studied at temperatures from 240 to 350 °C and sulfuric acid loadings from 0.92 to 7.10 wt.%. An optimal LGO yield of 7.58 wt.% was obtained at 270 °C with a sulfuric acid pretreatment concentration of 0.05 M (corresponding to 4.28 wt.% sulfuric acid loading). For comparison, microcrystalline cellulose pretreated by 0.05 M sulfuric acid solution was pyrolyzed at temperature from 270 °C to 320 °C, and bagasse loaded with 3-5 wt.% phosphoric acid was pyrolyzed at temperature from 270 °C to 350 °C. The highest yield of LGO from bagasse was 30% higher than that from microcrystalline cellulose, and treatment with sulfuric acid allowed a 21% higher yield than treatment with phosphoric acid.
authors: Anhui Province Key Laboratory for Biomass Clean Energy, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors: Xian-wei
authors: XW
authors: Sui
authors: Zhi
authors: Z
authors: Wang
authors: Bing
authors: B
authors: Liao
authors: Ying
authors: Y
authors: Zhang
authors: Qing-xiang
authors: QX
authors: Guo
mesh_terms: D001709:Biotechnology / Q000379:methods*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000378:metabolism*; D002482:Cellulose / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D005947:Glucose / Q000031:analogs & derivatives* / Q000378:metabolism; D010756:Phosphoric Acids / Q000494:pharmacology; D013464:Sulfuric Acids / Q000494:pharmacology*; D013696:Temperature
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D010756:Phosphoric Acids; D013464:Sulfuric Acids; D002482:Cellulose; C027433:bagasse; C512757:1,6-anhydro-3,4-dideoxyhex-3-enopyran-2-ulose; C030242:phosphoric acid; D005947:Glucose; C033158:sulfuric acid; C109691:microcrystalline cellulose