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Advanced ODC electrolysis reduces energy consumption even more

By Gerald Ondrey |

Around 70% of all chemical products use chlorine in their manufacturing process. At the same time, the production of this important base chemical is one of the most energy-intensive processes in the chemical industry. In order to change that, thyssenkrupp Industrial Solutions AG (Essen, Germany; www.thyssenkrupp-industrial-solutions.com) is offering the NaCl-ODC (oxygen depolarized cathode) electrolysis technology, which lowers power consumption and indirect CO2 emissions by up to 25% compared to standard chlor-alkali processes. Now, thyssenkrupp engineers have been able to further develop the technology: by raising the current density of the electrolyzer from 4 kA to 6 kA, output was increased by 50%. Electrolyzers with the same output capacity can now be built about one third smaller, resulting in significantly lower total cost of ownership, says the company. Thyssenkrupp’s cooperation partner Covestro AG (Leverkusen, Germany; www.covestro.com) will be the first to utilize the advanced ODC electrolysis for a new chlor-alkali plant in Tarragona, Spain. Energy consumption makes up roughly one third of the operating expenses of a chlor-alkali production plant. Thus, the advanced NaCl-ODC technology helps to significantly reduce…
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