Liquid HCI Electrolysis with Gas Diffusion Electrodes Technology
Chlorine is used as an oxidizing agent in several organic processes and gaseous HCl is often released as a by-product. It is not always possible to find an use for the acid and the discharge to waste treatment is not a satisfactory solution.
The recover of chlorine from hydrochloric acid has several advantages:
Gas Diffusion Electrode based electrolysis
ThyssenKrupp Uhde Chlorine Engineers (Italia) S.r.l. HCl membrane electrolyzers are based on the application of Gas Diffusion Electrode technology, also known as Oxygen Depolarized Cathode (ODC), to the electrolysis process. This innovative technology has been developed and industrialized with its Partners Bayer MaterialScience AG, Bayer Technology Services GmbH and De Nora Noth America. The principle consists in the oxygen reaction with the hydrogen ions that migrate through the membrane at the cathode side of the cell, resulting in an operating voltage lower than approx 1 V versus the standard reaction of hydrogen evolution, and the consequent energy savings.
All pictures courtesy of Bayer MaterialScience.