Recovery of platinum from secondary materials: electrochemical reactor for platinum deposition from aqueous iodide solutions
Recovery of platinum from secondary materials: electrochemical reactor for platinum deposition from aqueous iodide solutions
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DOI：
10.1007/s10800-016-1004-7
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发表时间：
2016-09
影响因子：
2.9
通讯作者：
R. Dawson;G. Kelsall
中科院分区：
文献类型：
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作者：
R. Dawson;G. Kelsall
设计、开发和证明了循环床颗粒反应器，以便于从浓缩的碘化物水溶液中回收稀的溶解铂类，这是使用良性条件从二次材料中回收铂的整个过程的重要组成部分。使用Fluent™计算流体动力学软件进行反应器的详细设计，以预测电解质和颗粒流，并使用Maple™模拟电化学性能。深入了解成功操作所需的设计特征，并在反应器设计中得到证明，包括电解质流速、附加入口喷嘴位置、电流方向上的床层深度、导流管宽度及其与入口喷嘴的接近程度的影响。反应器模型的预测和实验矩阵的结果之间的良好协议被发现进行定义的反应器性能。发现由反应器产生的电存款即使在运输控制操作下也是粘附的，支持循环微粒床中的机械相互作用可以改善运输和混合控制沉积制度中的存款形态的断言。模型预测和实验结果均表明，该反应器可以在约100 ℃的负荷下运行。45%，对应于约40%的特定电能消耗。1.0 kWh kg−1Pt，因此与产品价值相比，运营成本可以忽略不计。图形摘要
AbstractA 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−1Pt and hence negligible operating cost compared with the value of the product.Graphical abstract