title: The use of Weissler method for scale-up a Kraft pulp oxidation by TEMPO-mediated system from a batch mode to a continuous flow-through sonoreactor.
abstract: The efficiency of cellulose oxidation mediated by the 4-acetamido-TEMPO radical under ultrasonic cavitation was investigated using two ultrasonic systems: a batch lab scale ultrasonic bath with a glass reactor and a semi-continuous flow-through sonoreactor. The main objective was to explore the possibility of scaling up the production of oxidized cellulose under ultrasound, from a lab scale process to a pilot plant process, which served as a precursor for producing nanofibrils cellulose. It was found that under acoustic cavitation, the efficiency of TEMPO-mediation oxidation of native cellulose was significantly improved, particularly in the flow-through sonoreactor. In comparison with the glass reactor, the flow-through sonoreactor reduce the applied energy by 88% while increasing 7.8 times the production rate of radicals. These results enable a possibility of producing oxidized fibers for industrial applications.
authors.affiliation: Lignocellulosic Materials Research Centre, Université du Québec à Trois-Rivières, 3351 boulevard des Forges, Trois-Rivières, Qc, Canada. michel.paquin@uqtr.ca
authors.forename: Michel
authors.initials: M
authors.lastname: Paquin
authors.forename: Éric
authors.initials: É
authors.lastname: Loranger
authors.forename: Virginie
authors.initials: V
authors.lastname: Hannaux
authors.forename: Bruno
authors.initials: B
authors.lastname: Chabot
authors.forename: Claude
authors.initials: C
authors.lastname: Daneault