Coproduction xylo-oligosaccharides with low degree of polymerization and glucose from sugarcane bagasse by non-isothermal subcritical carbon dioxide assisted seawater autohydrolysis

Weiwei Zhang; Bo Zhang; Fuhou Lei; Pengfei Li; Jianxin Jiang

doi:10.1016/j.biortech.2022.126866

Coproduction xylo-oligosaccharides with low degree of polymerization and glucose from sugarcane bagasse by non-isothermal subcritical carbon dioxide assisted seawater autohydrolysis

Bioresour Technol. 2022 Apr:349:126866. doi: 10.1016/j.biortech.2022.126866. Epub 2022 Feb 17.

Authors

Weiwei Zhang¹, Bo Zhang², Fuhou Lei³, Pengfei Li³, Jianxin Jiang⁴

Affiliations

¹ Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, National Forest and Grass Administration Woody Spices (East China) Engineering Technology Research Center, Beijing Forestry University, Beijing 100083, PR China.
² Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, PR China.
³ Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, PR China.
⁴ Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, National Forest and Grass Administration Woody Spices (East China) Engineering Technology Research Center, Beijing Forestry University, Beijing 100083, PR China. Electronic address: jiangjx2004@hotmail.com.

PMID: 35183726
DOI: 10.1016/j.biortech.2022.126866

Abstract

High pretreatment temperature is necessary to obtain xylo-oligosaccharides (XOS) with low degree of polymerization (DP). However, traditional isothermal pretreatment for XOS production may increase the generation of xylose and furfural with the reaction time extending (10-100 min). In this study, non-isothermal subcritical CO₂-assisted seawater autohydrolysis (NSCSA) firstly used seawater and CO₂ for the coproduction of XOS with low DP and glucose. 51.44% XOS was obtained at 205 °C/5 MPa, and low-DP (2-4) XOS accounted for 79.13% of the total XOS. Furthermore, the specific surface area and total pore volume of the pretreated sugarcane bagasse (SCB) were 1.96 m²/g and 0.011 cm³/g, respectively, increased by 148% and 83% than that of nature SCB. Compared with subcritical CO₂ pretreatment, NSCSA is an efficient method for the coproduction of XOS with low DP and glucose through inorganic salts in seawater and H₂CO₃ formed from CO₂.

Keywords: Enzymatic hydrolysis; Glucose; Non-isothermal subcritical CO(2)-assisted seawater autohydrolysis; Sugarcane bagasse; Xylo-oligosaccharide.

MeSH terms

Carbon Dioxide
Cellulose
Glucose
Hydrolysis
Oligosaccharides
Polymerization
Saccharum*
Seawater

Substances

Oligosaccharides
Carbon Dioxide
Cellulose
bagasse
Glucose