Back to Search Start Over

Ionic Liquid Catalyzed Hydrolysis of Sugarcane Cellulose to Produce Reducing Sugar

Authors :
Ruihuan Liu
Jiying Li
Enming Liu
Ahmad Ali
Zicheng Li
Shun Yao
Source :
Biomass, Vol 4, Iss 3, Pp 886-903 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

As the most abundant bioenergy raw material in nature, cellulose can be converted into sugar by hydrolysis, which can be further degraded to produce downstream chemicals, such as polyols. Hydrolysis technology is one of the key steps in the development and utilization of cellulosic biomass resources. In this study, the ionic liquid (IL)-catalyzed hydrolysis of sugarcane cellulose into reducing sugar was studied. Firstly, the hydrolysis of sugarcane cellulose in different ionic liquids (including benzothiazolomethane sulfonate, [HBth][CH3SO3] and 1-methyl-3-(3-sulfopropyl)-imidazolium hydrogen sulfate, [C3SO3Hmim]HSO4) in heterogeneous and homogeneous systems to produce reducing sugar was studied. In a homogeneous system, the catalytic effect of an ionic liquid on sugarcane cellulose was explored. The pretreatment, IL dosage (0.1~1.0 g), reaction temperature (100~180 °C), addition of water (0~500 Ī¼L), and time (1~6 h) were all discovered as key conditions for hydrolysis. The acidity of an acidic ionic liquid is a key factor affecting the hydrolysis of sugarcane cellulose; meanwhile, effective pretreatment and water are also important. As a comparison, the catalytic effect of [C3SO3Hmim]HSO4 in heterogeneous systems (the maximum yield of 5.98% for total reducing sugars, TRS) was not as good as that of [HBth][CH3SO3] in homogeneous systems (33.97%). A higher temperature does not necessarily lead to an increased TRS yield, but it will make the maximum TRS appear earlier. At last, 732 cationic ion exchange resin was used to investigate the separation of reducing sugar and ionic liquid, and the recovery of ionic liquid was investigated by an adsorptionā€“desorption experiment. The ionic liquid can be well separated from TRS in the [HBth][CH3SO3] and reused at least five times.

Details

Language :
English
ISSN :
26738783
Volume :
4
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Biomass
Publication Type :
Academic Journal
Accession number :
edsdoj.33717c317823448395be6eae2cc21376
Document Type :
article
Full Text :
https://doi.org/10.3390/biomass4030049