Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1149/1945-7111/abdc78
Ключевые слова: spent petroleum catalyst, reduction kinetics, lithium cryolite melt, platinum recovery
Аннотация: Electrochemical behaviour of aluminium ions from the Pt/gamma-Al2O3 spent catalyst in the eutectic [LiF (63.6 wt.%)-AlF3 (36.4 wt.%)](eutectic)-5 wt.% CaF2 melt was studied by the means of cyclic voltammetry, chronopotentiometry and chronoamperometry methods. Tungsten rod (diameter 2 mm) was used as a working electrode. The XRD metПоказать полностьюhod was used to study the composition of melt collected near the working electrode and the spent catalyst. The aluminium reduction kinetics was studied concerning varying parameters like spent catalyst content in the melt and the temperature. The reduction of Al3+ ions on the tungsten electrode changed from diffusion-controlled to quasi-reversible process. The charge transfer coefficient and the diffusion coefficient were calculated from the data obtained from the above-mentioned methods. The estimated diffusion activation energy was 117.85 kJ.mole(-1). (c) 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
Журнал: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Выпуск журнала: Vol. 168, Is. 1
Номера страниц: 13505
ISSN журнала: 00134651
Место издания: PENNINGTON
Издатель: ELECTROCHEMICAL SOC INC