Production of xylooligosaccharides by microwave-induced, organic acid-catalyzed hydrolysis of different xylan-type hemicelluloses: Optimization by response surface methodology

Qixuan Lin; Huiling Li; Junli Ren; Aojie Deng; Weiying Li; Chuanfu Liu; Runcang Sun

doi:10.1016/j.carbpol.2016.09.091

Production of xylooligosaccharides by microwave-induced, organic acid-catalyzed hydrolysis of different xylan-type hemicelluloses: Optimization by response surface methodology

Carbohydr Polym. 2017 Feb 10:157:214-225. doi: 10.1016/j.carbpol.2016.09.091. Epub 2016 Sep 29.

Authors

Qixuan Lin¹, Huiling Li², Junli Ren³, Aojie Deng¹, Weiying Li¹, Chuanfu Liu¹, Runcang Sun⁴

Affiliations

¹ 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.
² 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.
³ 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.
⁴ Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.

PMID: 27987921
DOI: 10.1016/j.carbpol.2016.09.091

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.

Keywords: Hemicelluloses; Microwave-induced hydrolysis; Organic acid; Response surface methodology; Xylooligosaccharides.

MeSH terms

Acids / chemistry*
Glucuronates / chemical synthesis*
Hydrolysis
Microwaves*
Oligosaccharides / chemical synthesis*
Polysaccharides / chemistry*
Xylans / chemistry

Substances

Acids
Glucuronates
Oligosaccharides
Polysaccharides
Xylans
xylooligosaccharide
hemicellulose