从硫酸盐系统中循环流电场配置增强的凝固及其优化机制
Wenjie Ding1, Yunyan Wang1,2, Weizhi Zeng1
1School of Metallurgy and Environment, Central South University, Changsha 410017, China.
Materials (Basel, Switzerland)
|August 12, 2023
概括
一种新的流电场配置增强了- (Zn-Cd) 凝固,将海绵的纯度优化到94.1%,并确定30mL/s的流速是理想的. 低阴极-阳极-高的配置被证明是最有效的改善凝固率.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- - (Zn-Cd) 凝固对于金属回收至关重要.
- 优化这一过程需要理解复杂的流电场相互作用.
- 目前的方法在效率和纯度方面面临挑战.
研究的目的:
- 设计和实施一种新的流电场合配置,用于增强Zn-Cd凝固.
- 研究Zn-Cd凝固过程的优化和机制.
- 为了确定最佳的操作参数和流场配置.
主要方法:
- 使用了一种新型的流电场合装置用于Zn-Cd凝固.
- 使用各种技术分析海绵的特征 (纯度,形态,特定表面积).
- 采用横截面电子显微镜来揭示海绵生成和剥离.
- 研究了反应动力学,并通过激活能量计算确定了速度限制步骤.
主要成果:
- 从阳极获得了最佳的海绵纯度94.1%.
- 确定30mL/s为最佳流速,最大化特定表面积至1.151m2/g.
- 低阴极-阳极-高 (LCAH) 流场配置产生了较少的海绵结构,促进了脱皮和提高了凝固率.
- 确定了扩散步骤作为限制速率的过程,激活能量为12.6kJ/mol,遵循一阶动力学.
结论:
- 新的流电场配置显著提高了Zn-Cd凝固效率和纯度.
- 在这个过程中,LCAH配置和30 mL/s的流量是最佳的.
- 了解扩散控制的第一阶动力学是进一步优化过程的关键.
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