Gas Separation

EVONIK SEPURAN® Green membrane systems for biogas upgrading



The SEPURAN® product family includes membrane systems for gas separation in various applications. Many membrane systems can be connected together in series as desired, depending on the application and the size of the system. The product under the name SEPURAN® Green is specially designed for biogas upgrading.


  • Lower energy consumption
  • Separation at ambient temperature
  • Lower space requirements
  • Continuous separation process
  • Simple, modular setup
  • Flexible and easily expanded
  • Very high CO2/CH4 selectivity

The SEPURAN® N2 membrane module


Efficient and cost effective

  • More nitrogen production at the same air consumption
  • Enormous cost savings compared with conventional gas cylinders
  • Low installation and operating costs
  • Low maintenance

Simple and safe

  • Flexibility in setting the required purity
  • Simple to install and operate
  • Safety risks involved in handling cylinders are avoided
  • Low space requirements
  • Flexible modular setup
  • The system can be started and stopped at short intervals, ensuring high flexibility

Technology at the highest level

  • High capacity combined with low air consumption
  • N2 purity up to 99.5%
  • Pressure up to 16 barg (232 psig)
  • Stainless steel housing