Purification with mobile activated carbon filters

Biogas treatment

Converting biogas into electric power, heat from renewable sources or biomethane (RNG, Renewable Natural Gas) requires the gas to be treated first. This will prevent problems occurring in the gas engine while at the same time enabling gas quality in excess of 99% CH4 to be achieved, which renders the gas suitable for feeding into the natural-gas grid.

Components typically needing to be eliminated include H2S (hydrogen sulphide) and siloxanes from landfill gas for example or H2S and terpenes from fermentation gas. To meet all these challenges DESOTEC offers a customised package with immediate availability: mobile activated carbon filters, assuring the highest autonomy of the plant.

Furthermore, DESOTEC has developed a collection of top-of-the-range adsorption products that maximise performance and hence keep costs down to a minimum.

In addition to this, DESOTEC engineers, with their wide-ranging experience, are ideally placed to help you develop your process so as to achieve maximum performance, and thus reduce the TCO (Total Cost of Ownership) to the minimum.




DESOTEC offers different types of activated carbon for biogas treatment:

  • Non-impregnated activated carbon of different qualities for the removal of siloxanes and VOCs. (eg. terpenes)
  • Impregnated and catalytic activated carbon for the removal of H2S or NH3.

Our products are designed and produced for high volumetric (kg Sulphur/m3 AC) activity and thus low change out frequency and lowest cost per weight of H2S removed.


Specifically for the treatment of biogas, DESOTEC developed a fleet of mobile filters processing flows from 50 m³/h to 4000 m³/h per filter.

The use of mobile filters offers several advantages to the user:

  • An easy to use and compact solution.
  • Plug-and-Play
  • Small and compact units designed to treat a broad range of flows and concentrations.
  • The filters are offered with daily rental contracts. No capex facility is needed.
  • On site representative piloting.
  • No maintenance cost.
  • Continuous new developments and improvements

DESOTEC offers recycling solutions for spent activated carbon coming from biogas treatment plants in its own reactivation furnaces and other valorisation facilities.