title: A study of torrefied cardboard characterization and applications: Composition, oxidation kinetics and methane adsorption.
abstract: Torrefaction is proposed as a valorization process for non recycled cardboard. Torrefied cardboard was physically and chemically characterized and it was proposed for energy production and methane adsorption. The surface area and pore volume obtained were among 3.0-6.0m2/g and 5.7·10-3-2.3·10-2cm3/g, respectively. The carbon content increased with temperature and residence time of torrefaction. Oxidation kinetics of torrefied cardboard at different temperatures (250-300°C) and at different plateaus (60-120min) were tested. Torrefied cardboard was chemically treated with KOH in order to study the effect of K on thermal oxidation kinetics. It was observed that high torrefaction temperatures and residence times lead to a more stable char. Furthermore, kinetic parameters were obtained by iso-conversional methods and Coats and Redfern method. Attending to iso-conversional method, a decrease of Eawas observed with both, temperature and residence time of torrefaction. Whereas chemically treated presented highest Eavalues than torrefied cardboard. In addition, regarding Coats and Redfern method, the oxidation model was not highly modified by torrefaction temperature and residence time. However, for chemically treated samples the oxidation model was modified by K presence. Finally, CH4adsorption capacity of torrefied cardboard was studied at 30°C and atmospheric pressure. CH4partial pressures tested were lower than 0.45kPa. It was observed that CH4adsorption capacity increased with torrefaction time and decreased with chemical treatment. Thus, for the tested samples, the highest adsorption capacity observed was 5.70mgCH4/g of sample.
authors.affiliation: Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, 2425 rue de l'Agriculture, Ville de Québec, Québec, G1V 0A6, Canada; Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 2 avenue Albert Einstein, Villeurbanne F-69622, France; Institut de Recherche et de Développement en Agroenvironnement, 2700 rue Einstein, Ville de Québec, Québec G1P 3W8, Canada. Electronic address: beatriz.delgado-cano.1@ulaval.ca.
authors.forename: B
authors.initials: B
authors.lastname: Delgado
authors.affiliation: Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 2 avenue Albert Einstein, Villeurbanne F-69622, France. Electronic address: diego.lopez-gonzalez@ircelyon.univ-lyon1.fr.
authors.forename: D
authors.initials: D
authors.lastname: López González
authors.affiliation: Institut de Recherche et de Développement en Agroenvironnement, 2700 rue Einstein, Ville de Québec, Québec G1P 3W8, Canada. Electronic address: stephane.godbout@irda.qc.ca.
authors.forename: S
authors.initials: S
authors.lastname: Godbout
authors.affiliation: Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, 2425 rue de l'Agriculture, Ville de Québec, Québec, G1V 0A6, Canada. Electronic address: robert.lagace@fsaa.ulaval.ca.
authors.forename: R
authors.initials: R
authors.lastname: Lagacé
authors.affiliation: Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 2 avenue Albert Einstein, Villeurbanne F-69622, France. Electronic address: anne.giroir-fendler@ircelyon.univ-lyon1.fr.
authors.forename: A
authors.initials: A
authors.lastname: Giroir-Fendler
authors.affiliation: Centre National en Électrochimie et Technologies Environnementales, 2263 avenue du Collège, Shawinigan, Québec G9N 6V8, Canada. Electronic address: aaramirez@cnete.qc.ca.
authors.forename: A
authors.initials: A
authors.lastname: Avalos Ramirez
keywords: Agriculture greenhouse gases; Biochar; CH(4) adsorption; Modeling; Torrefaction; Waste valorization