Product Description


Pressure Swing Adsorption (PSA) is an effective method of gas separation, particularly where a complex mixture of gases are generated from the feedstock, or where there is high humidity – such as landfill sites. Under high pressure, different gases are attracted to different solid surfaces, or “adsorbed”. The higher the pressure, the more gas is adsorbed; when the pressure is reduced, the gas is released, or desorbed.

Following initial desulphurisation the PSA processes can be used to separate the mixed gases as different gases are adsorbed on different surfaces. Changing the pressure allows oxygen (O2), nitrogen (N) and carbon dioxide (CO2) to be trapped by the adsorbants, resulting in a continuous output of high-purity biomethane of at least 97%. The PSA system also effectively removes hydrogen sulphide (H2S) and in addition to other systems is able to recover the CO2 to use as a by-product.

The PSA system we offer is fast and efficient in regenerating the adsorbing agents at the heart of the system. The whole process uses very little power and is capable of high throughput rates of up to 3,000 Nm3/hr.

The PSA process integrates very effectively with water-wash systems providing solutions on projects that either system alone can’t. The units are easily installed in any indoor facility and have a wide range of applications in the food, pharmaceutical, chemical, automotive, medical and wastewater treatment industries.

 The advantages:

  • Particularly suitable for biogas from landfill sites
  • Potential to reuse CO2
  • Efficient removal of oxygen and nitrogen
  • Produces higher added value biomethane compared to biogas used for
  • Combined Heat and Power (CHP)
  • Modest visual impact

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