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Multi-Step Exploitation of Raw Arundo donax L. for the Selective Synthesis of Second-Generation Sugars by Chemical and Biological Route
- Source :
- Catalysts, Volume 10, Issue 1, Catalysts, Vol 10, Iss 1, p 79 (2020)
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Lignocellulosic biomass represents one of the most important feedstocks for future biorefineries, being a precursor of valuable bio-products, obtainable through both chemical and biological conversion routes. Lignocellulosic biomass has a complex matrix, which requires the careful development of multi-step approaches for its complete exploitation to value-added compounds. Based on this perspective, the present work focuses on the valorization of hemicellulose and cellulose fractionsof giant reed (Arundo donax L.) to give second-generation sugars, minimizing the formation of reaction by-products. The conversion of hemicellulose to xylose was undertaken in the presence of the heterogeneous acid catalyst Amberlyst-70 under microwave irradiation. The effect of the main reaction parameters, such as temperature, reaction time, catalyst, and biomass loadings on sugars yield was studied, developing a high gravity approach. Under the optimised reaction conditions (17 wt% Arundo donax L. loading, 160 &deg<br />C, Amberlyst-70/Arundo donax L. weight ratio 0.2 wt/wt), the xylose yield was 96.3 mol%. In the second step, the cellulose-rich solid residue was exploited through the chemical or enzymatic route, obtaining glucose yields of32.5 and56.2 mol%, respectively. This work proves the efficiency of this innovative combination of chemical and biological catalytic approaches, for the selective conversion of hemicellulose and cellulose fractions of Arundo donax L. to versatile platform products.
- Subjects :
- Arundo donax L
Biomass
Lignocellulosic biomass
02 engineering and technology
Xylose
lcsh:Chemical technology
01 natural sciences
Catalysis
lcsh:Chemistry
chemistry.chemical_compound
Second-generation sugars
Organic chemistry
lcsh:TP1-1185
Hemicellulose
Physical and Theoretical Chemistry
Cellulose
Microwaves
Cascade biomass exploitation
microwaves
Amberlyst-70
second-generation sugars
high gravity approach
chemical and enzymatic hydrolysis
cascade biomass exploitation
biology
010405 organic chemistry
Arundo donax
021001 nanoscience & nanotechnology
biology.organism_classification
0104 chemical sciences
lcsh:QD1-999
chemistry
Chemical and enzymatic hydrolysis
Yield (chemistry)
Chemical and enzymatic hydrolysi
High gravity approach
arundo donax l
0210 nano-technology
Microwave
Subjects
Details
- ISSN :
- 20734344
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Catalysts
- Accession number :
- edsair.doi.dedup.....3c032ef02f7aefb00d0125b21d7f1a25