Alfi Soemardji

LANXESS has developed special ion exchange resin grades within its Lewatit UltraPure range that are suitable for #watertreatment in PEM #electrolysis. The company recommends its Lewatit UltraPure 1242 MD, 1212 MD, and 1295 MD ion exchange resins, which are optimized for this application, to ensure low TOC (Total Organic Carbon) levels.   PEM technology employs several water circuits, and fresh #water is continuously introduced to compensate for water loss during #hydrogen production.   Demineralized water is used as process water, as the #membrane would suffer severe damage in a very short time due to minerals and other impurities. For instance, in 100 MW PEM systems, approximately 6,000 to 7,000 cubic meters of process water are circulated per hour and require adequate treatment.   Operating temperatures range between 50°C and 70°C during the process. This can release metallic and organic impurities from system components. For stable hydrogen production and an economical service life of the PEM stack, it is essential to constantly minimize these impurities. LANXESS has designed a special process water treatment using Lewatit UltraPure resins in combination with UV light.   To stabilize the water cycle quality, a partial flow of around 3–6% of the total water volume is continuously purified in a polisher unit. LANXESS recommends an upstream UV lamp to oxidize organic matter (TOC), followed by a combination of anion and cation exchange resins and a final polisher #filter.

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Watch our Chemistry Talks below on Crystallization: the unsung hero of chemical recycling! ♻️ This powerful technology is essential for purifying monomers and creating high-quality recycled polymers. Let's explore how we can optimize crystallization processes to build a more sustainable future. #chemicalrecycling #crystallization #sustainability #greenchemistry

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