Agency / Source: LANXESS

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LANXESS Ion Exchange Resins Applied in Hydrogen Production - LANXESS has developed special ion exchange resin grades within its Lewatit UltraPure range that can be used for water treatment in PEM electrolysis (Proton Exchange Membrane Electrolysis)
LANXESS Ion Exchange Resins Applied in Hydrogen Production


PRZOOM - /newswire/ - Cologne, North Rhine-Westphalia, Germany, 2024/04/15 - LANXESS has developed special ion exchange resin grades within its Lewatit UltraPure range that can be used for water treatment in PEM electrolysis (Proton Exchange Membrane Electrolysis). FRA: DE Frankfurt: LXS

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• Lewatit UltraPure for water treatment in PEM electrolysis;
• Sustainably generated electricity is converted to hydrogen;
• Continuous water purification required.

This process, which converts electricity from preferably renewable energies into hydrogen, is regarded as a promising approach to the sustainable production of this precious gas. In this way, fluctuations in wind power and solar radiation can be better compensated.

Experts believe that PEM electrolysis will play an important role in the transition to a hydrogen-based economy. Compared to alkaline electrolysis, the high current density of PEM electrolysis allows hydrogen to be produced in smaller systems. Another advantage: hydrogen filling stations can be connected directly to the high-pressure outlet.

The process is now so well developed that it enables highly efficient production in the megawatt range. This requires continuous purification of the process water. LANXESS recommends its Lewatit UltraPure 1242 MD (Strong Base Anion exchange resin, SBA), Lewatit UltraPure 1212 MD (Strong Acidc Cation exchange resins, SAC) and Lewatit UltraPure 1295 MD ion exchange resins, which are optimized for this application, to ensure low TOC (Total Organic Carbon) throw.

LANXESS’s Liquid Purification Technologies (LPT) business unit is in talks with renowned gas producers to establish standards for efficient water treatment in PEM electrolysis plants. Hans-Juergen Wedemeyer, Technical Marketing Manager at LPT, explained: “Our technical expertise, combined with our high-performance ion exchange resins, support the water purification process for systems. Preliminary application test results enable the plant conditions to be simulated and the state-of-the-art Lewatit UltraPure ion exchange resins to be optimally used. LANXESS is thus supporting a sustainable, climate-friendly energy supply.”
PEM electrolysis converts green electricity into hydrogen

In PEM electrolysis, a proton exchange membrane (PEM) is used to split water into the components hydrogen (H2) and oxygen (O2). If the electricity for this process is provided from renewable energies, this is accomplished with very low CO2 emissions. PEM technology employs several water circuits. In addition, fresh water is continuously introduced in order to compensate for the loss of water during the production of hydrogen.
High-purity water required

Demineralized water is used as process water, as the membrane would suffer from severe damages within a very short time due to minerals and other impurities. In 100 MW PEM systems, for example, around 6,000 to 7,000 cubic meters of process water are circulated per hour and require adequate treatment.

Operating temperatures range between 50 and 70 °C during the process. This can release metallic and organic impurities from the system components. For stable hydrogene production and an economical service life of the PEM stack, it is essential to constantly reduce these impurities to a minimum. LANXESS has designed a special process water treatment with Lewatit UltraPure resins in combination with UV light.
Ion exchangers continuously purify the water circuits

In order to stabilize the water cycle quality, a partial flow of around three to six percent of the total water volume is continuously purified in a polisher unit. LANXESS recommends an upstream UV lamp to oxidize the organic matter (TOC) followed by a combination of anion and cation exchange resins and a final polisher filter.

Detailed information on the products of the Liquid Purification Technologies business unit is available at


LANXESS ( is a leading specialty chemicals company with sales of EUR 6.8 billion in 2019. The company currently has about 14,400 employees in 33 countries. The core business of LANXESS is the development, manufacturing and marketing of chemical intermediates, additives, specialty chemicals and plastics. LANXESS is listed in the leading sustainability indices Dow Jones Sustainability Index (DJSI World and Europe) and FTSE4Good.

Forward-Looking Statements
This company release contains certain forward-looking statements, including assumptions, opinions, expectations and views of the company or cited from third party sources. Various known and unknown risks, uncertainties and other factors could cause the actual results, financial position, development or performance of LANXESS AG to differ materially from the estimations expressed or implied herein. LANXESS AG does not guarantee that the assumptions underlying such forward-looking statements are free from errors, nor does it accept any responsibility for the future accuracy of the opinions expressed in this presentation or the actual occurrence of the forecast developments. No representation or warranty (expressed or implied) is made as to, and no reliance should be placed on, any information, estimates, targets and opinions contained herein, and no liability whatsoever is accepted as to any errors, omissions or misstatements contained herein, and accordingly, no representative of LANXESS AG or any of its affiliated companies or any of such person's officers, directors or employees accepts any liability whatsoever arising directly or indirectly from the use of this document.

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LANXESS Ion Exchange Resins Applied in Hydrogen Production

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PEM Electrolysis | LANXESS
Contact: Michael Fahrig - 
+49 221 8885 5041 michael.fahrig[.]
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IMPORTANT INFORMATION: Issuance, publication or distribution of this press release in certain jurisdictions could be subject to restrictions. The recipient of this press release is responsible for using this press release and the information herein in accordance with the applicable rules and regulations in the particular jurisdiction. This press release does not constitute an offer or an offering to acquire or subscribe for any LANXESS securities in any jurisdiction including any other companies listed or named in this release.

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