Lignin Purification from Mild Alkaline Sugarcane Extract via Membrane Filtration

Nga Thi-Thanh Pham (), Nicolas Beaufils, Jérôme Peydecastaing, Philippe Behra and Pierre-Yves Pontalier ()
Additional contact information
Nga Thi-Thanh Pham: Laboratoire de Chimie Agro-Industrielle, Université de Toulouse, INRAE, Toulouse INP, 31030 Toulouse, cedex 4, France
Nicolas Beaufils: Laboratoire de Chimie Agro-Industrielle, Université de Toulouse, INRAE, Toulouse INP, 31030 Toulouse, cedex 4, France
Jérôme Peydecastaing: Laboratoire de Chimie Agro-Industrielle, Université de Toulouse, INRAE, Toulouse INP, 31030 Toulouse, cedex 4, France
Philippe Behra: Laboratoire de Chimie Agro-Industrielle, Université de Toulouse, INRAE, Toulouse INP, 31030 Toulouse, cedex 4, France
Pierre-Yves Pontalier: Laboratoire de Chimie Agro-Industrielle, Université de Toulouse, INRAE, Toulouse INP, 31030 Toulouse, cedex 4, France

Clean Technol., 2024, vol. 6, issue 2, 1-17

Abstract: In this study, the separation of lignin from a mild alkaline sugarcane bagasse extract was studied, and the impacts of different parameters on the filtration performance were evaluated. The tested parameters included transmembrane pressure (0.5–3.0 bar), shear rates (2831–22,696 s −1 ), temperature (20 and 40 °C), membrane molecular weight cut-off (5 and 10 kDa), and membrane material (polyethersulfone and polysulfone). During the filtration process, the permeate flux and all the main components of the extract were analyzed, including lignins (acid insoluble lignin and acid soluble lignin), sugars (xylose, arabinose, glucose, and galactose), total phenolic compounds, and phenolic acids (p-coumaric acid, ferulic acid, vanillin, and 4-hydroxybenzaldehyde). It was proved that the tested conditions had a great impact on the permeate flux and molecule retention rate. Increasing the temperature from 20 to 40 °C resulted in a much higher permeate flux for the 5 kDa PES membrane, and the impact of shear rate was greater at 40 °C for this membrane. Although the 5 kDa PES membrane could retain slightly more large molecules, i.e., acid-insoluble lignin and xylose, the 10 kDa membrane afforded greater phenolic acid removal capacity, leading to higher purity. For the 10 kDa PS membrane, the polarization layer began to form at TMP below 0.5 bar. This membrane had a lower retention rate for all molecules than the 10 kDa PES membrane.

Keywords: lignin purification; hemicellulose; phenolic compounds; alkaline extraction; sugarcane bagasse (search for similar items in EconPapers)
JEL-codes: Q2 Q3 Q4 Q5 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2571-8797/6/2/38/pdf (application/pdf)
https://www.mdpi.com/2571-8797/6/2/38/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jcltec:v:6:y:2024:i:2:p:38-766:d:1413340

Access Statistics for this article

Clean Technol. is currently edited by Ms. Shary Song

More articles in Clean Technol. from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().