HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Lignocellulosic biomass mild alkaline fractionation and resulting extract purification processes: Conditions, yields, and purities

Abstract : Fractionation of lignocellulose is a fundamental step in the valorization of cellulose, hemicelluloses, and lignin to produce various sustainable fuels, materials and chemicals. Strong alkaline fractionation is one of the most applied processes since the paper industry has been using it for more than a century, and the mineral acid fractionation process is currently the most applied for the production of cellulosic ethanol. However, in the last decade, mild alkaline fractionation has been becoming increasingly widespread in the frame of cellulosic ethanol biorefineries. It leads to the solubilization of hemicelluloses and lignin at various extent depending on the conditions of the extraction, whereas the cellulose remains insoluble. Some studies showed that the cellulose saccharification and fermentation into ethanol gave higher yields than the mineral acid fractionation process. Besides, contrary to the acid fractionation process, the mild alkaline fractionation process does not hydrolyze the sugar polymers, which can be of interest for different applications. Lignocellulosic mild alkaline extracts contain hemicelluloses, lignin oligomers, phenolic monomers, acetic acid, and inorganic salts. In order to optimize the economic efficiency of the biorefineries using a mild alkaline fractionation process, the purification of the alkaline extract to valorize its different components is of major importance. This review details the conditions used for the mild alkaline fractionation process and the purification techniques that have been carried out on the obtained hydrolysates, with a focus on the yields and purities of the different compounds.
Complete list of metadata

Cited literature [119 references]  Display  Hide  Download

https://hal.inrae.fr/hal-02624207
Contributor : Migration Prodinra Connect in order to contact the contributor
Submitted on : Tuesday, May 26, 2020 - 10:54:04 AM
Last modification on : Monday, November 29, 2021 - 3:12:48 PM

File

oriez_cleantechnol_2020_1.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Vincent Oriez, Jérôme Peydecastaing, Pierre-Yves Pontalier. Lignocellulosic biomass mild alkaline fractionation and resulting extract purification processes: Conditions, yields, and purities. Clean Technologies and Environmental Policy, Springer Verlag, 2020, 2 (1), pp.91-115. ⟨10.3390/cleantechnol2010007⟩. ⟨hal-02624207⟩

Share

Metrics

Record views

7

Files downloads

161