Recovery of platinum from secondary materials:electrochemical reactor for platinum deposition from aqueous iodide solutions

Dawson, Richard James and Kelsall, Geoff (2016) Recovery of platinum from secondary materials:electrochemical reactor for platinum deposition from aqueous iodide solutions. Journal of Applied Electrochemistry, 46 (12). pp. 1221-1236. ISSN 0021-891X

Full text not available from this repository.

Abstract

A circulating bed particulate reactor was designed, developed, and demonstrated to facilitate recovery of dilute dissolved platinum species from concentrated aqueous iodide solutions, an essential component for the overall process proposed for the recovery of Pt from secondary materials using benign conditions. A detailed design for the reactor was undertaken using the Fluent™ computational fluid dynamics software to predict electrolyte and particulate flows, and Maple™ for simulating the electrochemical performance. Insight was gained into the design features required for successful operation and demonstrated in the reactor design, including effects of electrolyte flow rate, additional inlet nozzle locations, bed depth in the direction of current flow, draft tube width, and its proximity to the inlet nozzle. Good agreement was found between the reactor model predictions and the results of the experimental matrix conducted to define the reactor performance. The electrodeposit produced by the reactor was found to be adherent even under transport controlled operation, supporting the assertion that mechanical interactions in a circulating particulate bed can improve deposit morphologies in transport and mixed controlled deposition regimes. The model predictions and the experimental results both showed that the reactor could be operated with charge yields of ca. 45 %, corresponding to specific electrical energy consumptions of ca. 1.0 kWh kg−1 Pt and hence negligible operating cost compared with the value of the product.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Applied Electrochemistry
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600/1603
Subjects:
ID Code:
82036
Deposited By:
Deposited On:
10 Oct 2016 10:56
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Jun 2020 04:00