Abstract
Autohydrolysis (AH) prior to the kraft process is one way to valorize hemicelluloses. The presented results show that AH also has a beneficial effect insofar as kraft cooking can be substituted by soda cooking, and higher brightness levels can be achieved under the same bleaching conditions. The lignin has more free phenolic groups after AH, which is attributable to depolymerization, and which could partly explain the better pulping and bleaching results. Another explanation could be the lower amount of lignin involved in lignin carbohydrate complexes after an AH step.
Acknowledgments
The authors would like to thank the FUI BIO3 project for the funding of this PhD thesis work. LGP2 is part of the LabEx Tec 21 (Investissements d’Avenir-grant agreement n° ANR-11-LABX-0030) and of PolyNat Carnot Institute (Investissements d’Avenir-grant agreement n° ANR-16-CARN-0025-01). This work was developed in the framework of Glyco@Alps (ANR-15-IDEX-02).
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: Fonds Unique Interministériel (FUI) funded BIO3 project.
Employment or leadership: None declared.
Honorarium: None declared.
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