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首页> 外文期刊>Separation and Purification Technology >Electrochemical recovery of tin from the activating solutions of the electroless plating of polymers Galvanostatic operation
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Electrochemical recovery of tin from the activating solutions of the electroless plating of polymers Galvanostatic operation

机译：从聚合物化学镀的活化溶液中电化学回收锡恒电流运行

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The performance of a two-compartment batch electrochemical reactor separated by a ceramic diaphragm for tin removal from the activating solutions in galvanostatic operation is studied in this paper.The effect of the applied current on the figures of merit (fractional conversion,current efficiency,space-time yield and specific energy consumption) of the electrochemical reactor is analysed.As the applied current increases,current efficiency (phi) for tin recovery decreases due to the hydrogen-reduction side reaction,which causes an increment in the specific energy consumption (E_s).On the other hand,the greater the applied current,the higher the values of both tin fractional conversion (X) and space-time yield (eta) because of an increase in the mass transfer coefficient because of the hydrogen turbulence-promoting action and in the electrode area roughness.Sn(II) formation resulting from Sn(IV) electrochemical reduction as a function of the applied current is also evaluated.When the applied current is higher than the limiting current,the electrode potential is of about - 1 V,and the concentration of Sn(IV) ion considerably decreases,the stannous ion formation has been observed.
机译：本文研究了在恒电流运行中用陶瓷隔膜隔开的两室间歇式电化学反应器在活化溶液中脱锡的性能。施加电流对品质因数（分数转换，电流效率，空间）的影响分析了电化学反应器的时间产量和单位能耗。随着施加电流的增加，由于氢还原副反应，锡回收的电流效率（phi）降低，这导致单位能耗（E_s）的增加。另一方面，施加的电流越大，由于氢湍流促进作用导致传质系数增加，锡分数转化率（X）和时空产率（η）的值都越高还评估了由Sn（IV）电化学还原导致的Sn（II）形成与所施加电流的函数关系。闲置电流高于极限电流，电极电势约为-1 V，并且Sn（IV）离子的浓度大大降低，已观察到亚锡离子的形成。

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