High-quality and efficient zinc electrodeposition in a polyethyleneglycol 20,000-assisted ammonia solution
- 点击次数：
- 影响因子：5.3
- DOI码：10.1016/j.hydromet.2023.106179
- 发表刊物：HYDROMETALLURGY
- 关键字：Zinc;
Ammonia;
Polyethylene glycol 20000;
Electrodeposition;
Electrochemical behavior;
Simulation and evaluation
- 摘要：Ammonia system shows great potential in the treatment of zinc secondary resource, and electrodeposition has been confirmed as a vital process to extract zinc from the ammonia leachate. However, the ammonia systembased zinc electrodeposition is either inefficient or the zinc deposit in of undesired quality. This study proposes a polyethylene glycol 20,000 (PEG20000 polymer of formula H(OCH2CH2)nOH)-assisted ammonia system to conduct high-quality and efficient zinc electrodeposition. The practical operation achieved a low electrical energy consumption of 2391 kW h t-1 Zn and a high current efficiency of 99%, with a smooth and compact zinc deposit of fine (30.2 nm) grains. Further investigation of electrodeposition behavior revealed the following: (i) deposition principle, (ii) diffusion property, and (iii) three-dimensional (3D) instantaneous nucleation mode, and provided a useful reference for guiding the process design and conditions of the practical operation. In general, PEG20000-assisted ammonia system turns out to be a technically and economically viable option to electrodeposit zinc, for its high energy competitiveness and high-quality Zn products.
- 论文类型：期刊论文
- 论文编号：106179
- 学科门类：工学
- 一级学科：冶金工程
- 文献类型：J
- 卷号：222
- 是否译文：否
- 发表时间：2023-10-08
- 收录刊物：SCI、EI、SSCI
