You are invited to attend Dave Param's MASc Oral Exam, where he will discuss his research on Dry Extraction of Nickel from Mixed-Hydroxide Precipitates via Reduction and Carbonylation
Abstract:
This study investigates the extraction of Ni from various MHPs through a 2-step vapour metallurgical process involving the hydrogen reduction of the metallic hydroxides, followed by reaction with CO to selectively extract Ni in the form of nickel tetracarbonyl. Reactions were conducted in a pressurized thermogravimetric analyzer to characterize reduction, carbonylation behaviour, and Ni extraction at various process conditions.
Techniques such as ICP-OES, FTIR spectroscopy, and BET were used to characterize the structural and morphological changes in the fresh and residual samples, and to verify Ni extraction efficiency. A 95% Ni extraction was obtained with a sample characterized by a high surface area prior to carbonylation (69 m²/g), and large enough micropores to facilitate reactant and product gas diffusion.
Supervisor: Professor Eric Croiset