A1 Journal article (refereed)
Characterization of lignin dissolved during alkaline sodium borohydride and hydrogen peroxide pretreatments of sugar maple (Acer saccharum) (2024)


Lehto, J., Heiningen, A. V., Haapala, T., Louhelainen, J., Pakkanen, H., & Alén, R. (2024). Characterization of lignin dissolved during alkaline sodium borohydride and hydrogen peroxide pretreatments of sugar maple (Acer saccharum). Cellulose Chemistry and Technology, 58(1-2), 141-152. https://doi.org/10.35812/CelluloseChemTechnol.2024.58.14


JYU authors or editors


Publication details

All authors or editors: Lehto, Joni; Heiningen, Adriaan van; Haapala, Tero; Louhelainen, Jarmo; Pakkanen, Hannu; Alén, Raimo

Journal or series: Cellulose Chemistry and Technology

ISSN: 0576-9787

eISSN: 2457-9459

Publication year: 2024

Publication date: 15/03/2024

Volume: 58

Issue number: 1-2

Pages range: 141-152

Publisher: Institutul de Chimie Macromoleculara Petru Poni

Publication country: Romania

Publication language: English

DOI: https://doi.org/10.35812/CelluloseChemTechnol.2024.58.14

Publication open access: Not open

Publication channel open access: 


Abstract

Sugar maple (Acer saccharum) wood chips were pretreated with aqueous sodium hydroxide, sodium borohydride, and hydrogen peroxide pretreatments, and the characterization (i.e., amount, molar masses, and molar mass distributions) of the lignin dissolved during the pretreatments was performed. Of the applied pretreatments, especially borohydride pretreatments were efficient in dissolving lignin from this feedstock, as 20% to 28% of the dissolved organics were
found to consist of dissolved lignin, contributing to 3.4% to 9.0% of the initial wood lignin. Corresponding values for 2.5% and 5.0% alkaline peroxide pretreatments were from 5.9% to 9.2% dissolved lignin of the total dissolved organics and from 1.1% to 3.2% of the initial wood lignin. Additionally, determined molar masses and molar mass distributions indicated that borohydride pretreatments generally led to the formation of smaller-molar-mass lignin fragments when compared to reference pretreatments and to pretreatments conducted with alkaline peroxide process, indicating more efficient lignin degradation caused by borohydride addition. For example, Mn and Mw values of the analyzed reference effluents were 54%-62% and 66%-71% higher when compared to the corresponding borohydride effluents, respectively


Keywords: lignin; dissolution (active); biomass (industry); wood chip; maple; preliminary treatment; hydrides; hydrogen peroxide

Free keywords: hydrogen peroxide; lignin; molar mass distribution; pretreatment; sodium borohydride; sugar maple


Contributing organizations


Ministry reporting: Yes

Reporting Year: 2024

Preliminary JUFO rating: 1


Last updated on 2024-17-05 at 07:07