title: Production of xylooligosaccharides by microwave-induced, organic acid-catalyzed hydrolysis of different xylan-type hemicelluloses: Optimization by response surface methodology.
abstract: A feasible approach to produce xylooligosaccharides (XOS) using organic acids as catalysts by microwave-induced hydrolysis of different hemicelluloses was developed. The effects of different acids (oxalic acid, maleic acid, citric acid and sulfuric acid), acid concentration, reaction temperature and reaction time on the hemicelluloses hydrolysis were investigated. Results demonstrated that organic acid was more beneficial to the XOS production than the conventional sulfuric acid. Higher acid concentration, higher reaction temperature and longer reaction time accelerated the further depolymerization of XOS to form monosaccharide. Response surface methodology was employed to optimize the reaction conditions (temperature and time) for the production of XOS from beechwood xylan (BX), corncob hemicelluloses (CH) and recovered hemicelluloses from the industrial waste liquor of dissolving pulp (RH), respectively. The predicted highest XOS yields were achieved to 39.31% (126.54°C-7.95min), 27.29% (120.00°C-0min), 30.32% (122.63°C-15.85min), respectively, being close to the experimental value (39.42%, 27.46% and 30.89%) from BX, CH and RH, indicating the fitted models of XOS yield were in good agreement with the experimental results.
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, Plant Micro/Nano Fiber Research Center, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Qixuan
authors.initials: Q
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, Plant Micro/Nano Fiber Research Center, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.
authors.forename: Huiling
authors.initials: H
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, Plant Micro/Nano Fiber Research Center, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China. Electronic address: renjunli@scut.edu.cn.
authors.forename: Junli
authors.initials: J
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, Plant Micro/Nano Fiber Research Center, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Aojie
authors.initials: A
authors.lastname: Deng
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, Plant Micro/Nano Fiber Research Center, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Weiying
authors.initials: W
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, Plant Micro/Nano Fiber Research Center, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Chuanfu
authors.initials: C
authors.lastname: Liu
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
authors.forename: Runcang
authors.initials: R
authors.lastname: Sun
mesh_terms: D000143:Acids / Q000737:chemistry*; D005965:Glucuronates / Q000138:chemical synthesis*; D006868:Hydrolysis; D008872:Microwaves; D009844:Oligosaccharides / Q000138:chemical synthesis*; D011134:Polysaccharides / Q000737:chemistry*; D014990:Xylans / Q000737:chemistry
chemical_list: D000143:Acids; D005965:Glucuronates; D009844:Oligosaccharides; D011134:Polysaccharides; D014990:Xylans; C570991:xylooligosaccharide; C007916:hemicellulose
keywords: Hemicelluloses; Microwave-induced hydrolysis; Organic acid; Response surface methodology; Xylooligosaccharides