Logo
RECHERCHER

4-Acetamido-Tempo-mediated oxidation of wood chips and thermomechanical pulp in large scale

Téléchargements

Téléchargements par mois depuis la dernière année

Plus de statistiques...

Myja, D. et Loranger, E. et Lanouette, R. (2019). 4-Acetamido-Tempo-mediated oxidation of wood chips and thermomechanical pulp in large scale. Industrial and Engineering Chemistry Research, 58 (28). p. 12723-12728. ISSN 0888-5885 DOI 10.1021/acs.iecr.9b02049

[thumbnail of LORANGER_E_126_POST.pdf]
Prévisualisation
PDF
Télécharger (606kB) | Prévisualisation

Résumé

The 2,2,6,6-Tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation was mainly studied in laboratory scale and needs to be scaled-up for any future industrial implantation. With this objective, the oxidation was applied at several steps in a thermomechanical pulp production system. Softwood chips were impregnated with a TEMPO mixture or treated in batch before refining, leading to a modification of pulp mechanical and optical properties. The TEMPO oxidation was also studied on softwood pulp with a usual batch oxidation, a high consistency treatment or by replacing the diluted water by a TEMPO oxidation medium during the secondary refining. Pulp from high-consistency oxidation presented a significant energy potential gain. However, optical properties were severely affected and could not be totally recovered by a conventional hydrogen peroxide bleaching. The refiner was also used as a nanofiber-producing apparatus for pulp with carboxylic group content higher than 1500 mmol/kg. For this application, the refiner appeared to be a high-efficiency dispersion system to produce significant amounts of nanofibers at low-energy consumption. © 2019 American Chemical Society.

Type de document: Article
Mots-clés libres: energy utilization nanofibers optical properties oxidation refining softwoods thermomechanical pulp thermomechanical pulping process wood products 2 ,2 ,6 ,6-Tetramethylpiperidine-1-oxyl carboxylic group dispersion systems hydrogen peroxide bleaching low energy consumption pulp production system secondary refining thermo-mechanical pulp refining chips high Consistency pulps
Date de dépôt: 01 juill. 2021 12:29
Dernière modification: 01 juill. 2021 12:29
Version du document déposé: Post-print (version corrigée et acceptée)
URI: http://depot-e.uqtr.ca/id/eprint/9639

Actions (Identification requise)

Dernière vérification avant le dépôt Dernière vérification avant le dépôt