Encyclopedie de la recherche sur l'aluminium au Quebec - Edition 2014 | Seite 23

PRODUCTION DE L’ALUMINIUM // ALUMINIUM PRODUCTION

Relationship between the chemical and
the diffusionENTRE LES RÉACTIVITÉS CHIMIQUES ET SOUS DIFFUSION
reactivities
RELATION
of carbon anode under CO2 at 960 C
D'UNE ANODE EN CARBONE VIS-À-VIS DU CO2 À 960 oC

21

O

Relation entre les réactivités chimique et
RELATIONSHIP BETWEEN
sous diffusion d’une anode en carbone THE CHEMICAL AND THE DIFFUSION
REACTIVITIES OF CARBON ANODE UNDER CO2 AT 960 oC
vis-à-vis du CO2 à 960 C
O

F.Chevarin1,2, L. Lemieux1,2, D. Ziegler3, M.Fafard2, H. Alamdari1,2
1Department

of Mining, Metallurgical and Materials Engineering, 1065 avenue de la Médecine
Université Laval, Québec, QC, G1V 0A6, Canada
MODELLING OF ALUMINIUM CELL
AND ELECTRICAL ENERGY
Industrial Research Chair MACE3 and Aluminium Research Centre – REGAL
EFFICIENCY
Université Laval, Québec, QC, G1V 0A6, Canada
3Alcoa Primary Metals, Alcoa Technical Center, 100 Technical Drive, Alcoa Center, PA,15069-0001, USA
2NSERC/Alcoa

1. Introduction

2. Objectives

Carbon anode used in the Hall-Héroult
electrolysis process is gasified according
to the Boudouard reaction (CO2+C→2CO).
A gradient of concentration is created due
to the limitations of the CO2 gas diffusion
through the anode porosity during its
gasification. The