Analysis of a novel chlorine recycling process based on anhydrous HCl oxidation

作者：Martinez Isai Gonzalez; Vidakovic Koch Tanja^*; Kuwertz Rafael; Kunz Ulrich; Turek Thomas; Sundmacher Kai

来源：Electrochimica Acta, 2014, 123: 387-394.

DOI：10.1016/j.electacta.2014.01.050

• Membrane electrode assembly
• Chlorine recycling
• HCl gas phase oxidation
• Oxygen reduction reaction (ORR)
• Cyclone flow cell

A novel process for the recycling of chlorine based on the gaseous HCl oxidation on gas diffusion electrodes has been investigated. The cathodic and anodic reactions have been analyzed separately as half-cell reactions in a cyclone flow cell and optimized regarding catalyst as well as ionomer loadings. For the anodic hydrogen chloride oxidation, an optimal value of ca. 60 wt% Nafion has been found, whereas for the cathodic oxygen reduction a value below 37 wt% has been obtained. This discrepancy was mainly attributed to the different absorption and transport properties of HCl in Nafion compared to oxygen. The main potential losses in the reactor were identified at the cathode.

• 出版日期2014-3-20