title: Hydrolysis kinetics characteristic of recycled fiber in subcritical water.
abstract: Recycled fiber hydrolysis was conducted to evaluate the feasibility of reducing sugar accumulation for biofuel products during hydrolysis in subcritical water. The hydrolysis conversion of recycled fiber was reaching to approximate 90% within 3 min at 280-320 °C, while the glucose decomposed simultaneously within 0.5 min. The FTIR wave variation and the crystalline index of hydrolysis residue indicated that the intermolecular, intramolecular hydrogen bond and the crystalline was a constraint for recycled fiber hydrolysis. The kinetics analysis demonstrated the cylindrical shape model is proper at low temperature for recycled fiber hydrolysis, while sphere shape model is suitable at high temperature. The apparent activation energies of recycled fiber on both kinetics models were 58.19 kJ mol(-1) and 53.18 kJ mol(-1), which were lower than that the glucose with 79.59 kJ mol(-1). Therefore, the conclusion is drawn that the high yield of glucose during recycled fiber hydrolysis is achievable by reducing the cellulose crystalline through proper indispensible pretreatments.
authors.affiliation: College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, China. yanwang@scut.edu.cn
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Jinquan
authors.initials: J
authors.lastname: Wan
authors.forename: Yongwen
authors.initials: Y
authors.lastname: Ma
authors.forename: Mingzhi
authors.initials: M
authors.lastname: Huang
mesh_terms: D001709:Biotechnology / Q000379:methods*; D002384:Catalysis; D002482:Cellulose / Q000737:chemistry; D004867:Equipment Design; D005947:Glucose / Q000737:chemistry; D006868:Hydrolysis; D007700:Kinetics; D008855:Microscopy, Electron, Scanning / Q000379:methods; D059027:Recycling; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods
chemical_list: D014874:Water Pollutants, Chemical; D014867:Water; D002482:Cellulose; D005947:Glucose