LiveZilla Live Chat Software

Constellation, le dépôt institutionnel de l'Université du Québec à Chicoutimi

Modification of biocoke destined for the fabrication of anodes used in primary aluminum production

Amara Belkacem, Faouzi Fatima-Ezzahra, Kocaefe Duygu, Kocaefe Yasar S., Bhattacharyay Dipankar, Côté Jules et Gilbert André. (2021). Modification of biocoke destined for the fabrication of anodes used in primary aluminum production. Fuel, 304, e121352.

[img] PDF - Version acceptée
Administrateurs seulement jusqu´à 15 Novembre 2023.
Disponible sous licence Creative Commons Attribution Non-commercial No Derivatives.

361kB

URL officielle: http://dx.doi.org/doi:10.1016/j.fuel.2021.121352

Résumé

Calcined petroleum coke, recycled anodes and the coal tar pitch are the raw materials used to manufacture carbon anodes for aluminum production. In order to reduce greenhouse (GHG) emissions from the aluminum industry and to add a value to the residue of wood industry, a small part of the calcined petroleum coke, used for the production of carbon anodes, was replaced with biocoke produced from wood by-products. Since the addition of biocoke deteriorates the properties of carbon anodes, it was modified using an additive in order to assess if the modification can render biocoke more suitable for carbon anode production by modifying the surface chemistry of the biocoke.

Three samples of biocoke, unmodified, modified using 3% additive and modified using 4% additive, were produced and studied before and after modification to identify its effect on biocoke properties. First, the chemical characterization was carried out using X-ray photoelectron spectrometry (XPS) to verify whether the functional groups were added to the biocoke surface during the modification. To study the influence of the biocoke modification on the biocoke/pitch interactions, the wettability of the unmodified and modified biocokes by the coal tar pitch, which is used as a binder in anodes, were measured using sessile-drop test. After, the laboratory scale anodes were produced and their green and baked densities, electrical resistivity, air and CO2 reactivities, and bending strength were measured. The results showed that the biocoke modification was effective. A number of new surface chemical groups were added to the biocoke coke surface. This improved the biocoke/pitch wettability, consequently affected the anode properties.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:304
Pages:e121352
Version évaluée par les pairs:Oui
Date:15 Novembre 2021
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:biocoke modification, surface functional groups, wettability, pitch, carbon anodes, additive, modification du biocoke, groupes fonctionnels de surface, mouillabilité, anodes de carbone, additif
Déposé le:01 sept. 2021 02:13
Dernière modification:01 sept. 2021 02:13
Afficher les statistiques de telechargements

Éditer le document (administrateurs uniquement)

Creative Commons LicenseSauf indication contraire, les documents archivés dans Constellation sont rendus disponibles selon les termes de la licence Creative Commons "Paternité, pas d'utilisation commerciale, pas de modification" 2.5 Canada.

Bibliothèque Paul-Émile-Boulet, UQAC
555, boulevard de l'Université
Chicoutimi (Québec)  CANADA G7H 2B1
418 545-5011, poste 5630