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We are an advanced materials company with a suite of membrane separation technologies applied to dissolved gas sensing, dehydration, solvent recovery, and olefin/paraffin and aggressive chemical separations

Olefin-paraffin separation

Separate and concentrate olefins, the building blocks of the chemicals industry.  We offer a stable new material that performs this complex separation at  greatly reduced cost and energy expenditure.

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Solvent dehydration

Reduce hazardous waste and supply chain costs. Dry and recover previously irrecoverable solvent (e.g. IPA) for re-use. Highly effective at drying solvents past the azeotrope with purification for reuse for cents on the dollar.

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O2 and N2 enriched air

Generate oxygen and nitrogen enriched air to meet your need for combustion suppression, greater fuel efficiency, or reduced Nox emissions.

Lubricant dehydration

Reduce failure, downtime, cost and maintenance from water ingress into lubrication systems. CMS membrane dehydration systems remove free and dissolved water, including from EALs, with superior ease of use and performance to alternative technologies.

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Gas Sensing

Sampling and detection of dissolved gases in oils. Detection of fault gases in transformer di-electric oil.

Custom separations

Address your need for a chemically and thermally resistant separation (or addition) of liquids and gases. 

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Industries We Serve


Bringing new technologies to refineries, gas plants, hydraulic fracking, and offshore oil and gas rigs that raise yield and reduce maintenance, cost, and energy consumption.

Machinery and Equipment

Removing water from lubricants to improve performance and extending life in pulp and paper, mining, and steel operations. Reducing risks and costs associated with using new environmentally friendly lubricants in marine.


Serving combined cycle plants, nuclear facilities, coal plants, and wind turbines to help prevent failures, reduce maintenance and raise uptime from transformers to gearboxes.


Enabling safety equipment to perform better and last longer

Meet our team

  • Erica Nemser

    Chief Executive

    Erica comes to CMS following 13 years at McKinsey & Company, serving clients across a wide range of industries, advising on a range of commercial topics including organic growth, acquisition, brand management, product launch, portfolio optimization, operations, and crisis management. At McKinsey, Erica also led several change initiatives across the global organization.  She holds a PhD in Economics from the University of Pennsylvania.

  • Irene Goncharovsky

    Head of Manufacturing

    Irene leads CMS commercial manufacturing and supply chain operations as well as prototype and development programs for new products and line extensions.  With a background in chemical engineering, Irene acts as the product design liaison between the scientific and research teams and the manufacturing team.

  • Sudip Majumdar

    Chief Technology Officer

    Sudip is an expert membranologist, leading research programs in gas separation, dehydration, and olefin paraffin separation, among others. Sudip leads the technical support team for a number of commercialized products and acts as technical director on product development programs.  Sudip has a PhD in Chemical Engineering 

  • Stuart Nemser

    Founder and Chairman

    Stuart is the founder and chairman of Compact Membrane Systems.  Prior to CMS he held a range of engineering and management positions at DuPont.  Stu earned SB, SM and ScD degrees in chemical engineering from MIT.