IMAGING TECHNIQUES FOR UNDERSTANDING PHYSICO-MECHANICAL MODIFICATIONS OF LIGNOCELLULOSIC BIOMASS DUE TO HYDROTHERMAL PRETREATMENT
Résumé
Steam explosion is a promising lignocellulosic biomass pretreatment for improving carbohydrates accessibility to enzymatic hydrolysis. The mechanical properties degradation during hydrothermal step is a key parameter for the process efficiency. In this work, two imaging techniques were used to assess changes in ultrastructural characteristics of poplar cell wall caused by hydrothermal pretreatment. Firstly, anatomical changes on the cell wall structure were observed by X-ray nano-tomography. Secondly, chemical changes in the different layers of the cell wall before and after pretreatment were observed by two-dimensional chemical mapping through Raman micro-spectrometry. The comparison between pretreated and raw biomass revealed shrinkage and thinning of cell wall as well as sub-parietal chemical changes.
Origine : Fichiers produits par l'(les) auteur(s)
Loading...