期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 168, 期 1, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/abdc78
关键词
spent petroleum catalyst; reduction kinetics; lithium cryolite melt; platinum recovery
资金
- RFBR [18-29-24122]
The electrochemical behavior of aluminum ions from Pt/γ-Al2O3 spent catalyst in a eutectic melt was studied using various methods, with a focus on the reduction kinetics and calculating charge transfer coefficients and diffusion coefficients. The study found a transition from diffusion-controlled to quasi-reversible process for the reduction of Al3+ ions on the tungsten electrode, with an estimated diffusion activation energy of 117.85 kJ.mole(-1).
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 method 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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据