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Oxygen-depolarized cathode: Quantum leap in sustainability ODC benefits - Up to 25 % less energy consumption than conventional membrane-based technology - Ecologically valuable solution thanks to lower CO2 emissions - BM2.7 and ODC technologies combinable in a single plant thanks to full compatibility of electrolysis cells and brine cycle - Reliable, well-proven technology - Higher degree of site flexibility with regard to electricity and hydrogen supplies 14 In countries where electricity is expensive, the NaCl-ODC electrolysis technology developed in collaboration with Covestro (formerly Bayer Material Science) offers distinct advantages: for example, up to 25 % less energy consump- tion than conventional membrane-based technology. Hydrogen formation suppressed NaCl-ODC electrolysis technology is based on oxygen-depolarized cathodes (ODCs) integrated into the single-element elec- trolysis technology (BM2.7 design). The decisive difference between NaCl-ODC electrolysis and conventional membrane- based technology is in the cathode; the anode is no different. The oxygen introduced into the cathode compartment suppresses the formation of hydrogen, which results in a reduction in cell voltage from around 3V to 2V. This in turn enables ODC technology to cut power consumption by up to 25%, for example, 1,590kWH/mt NaOH at 6kA/m2. Alternatively, if power consumption is kept constant, a corre- sponding power capacity increase is pos- sible. By saving energy, ODC technology indirectly helps customers to improve their carbon footprint and enhance their sustainability image. Easy upgrades, fully compatible What’s more, a plant running on conven- tional membrane technology can be partly or entirely converted to NaCl-ODC tech- nology, if required. Since the electrolysis cells and brine cycle are fully compatible, NaCl-ODC and conventional membrane technologies can be easily combined in a single plant.PDF Image | Chlor-Alkali Electrolysis
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