Posted in | Biofuels

ETW Energietechnik Developed the SmartCycle PSA to Upgrade Biogas to RNG


80,000 hours on-stream time, more than 99 percent availability and purity Moers, 4th Oktober 2016: The Pressure Swing Adsorption (PSA) technology is recognized for decades as an effective and feasible process for gas upgrading in different large scale industrial applications.

The German company ETW Energietechnik GmbH located in the city of Moers successfully improved and optimized this technology for the biogas upgrading process.

The new Biogas upgrading technology was developed by a team of adsorption specialists with many years of experience in the chemical industry, highly qualified plant

builders and mechanical engineers. That’s how the SmartCycle PSA was born. The Biogas upgrading system developed by ETW is designed to grant very long equipment


The SmartCycle PSA stands out with an extremely low energy consumption of 0.14KWh/Nm³ - an enormous step in innovation with large economic benefits. Only the optimized pressure swing process made it possible to use an innovative dry, low maintenance compressor technology with a very high availability.

The Biomethane plant designed by ETW can automatically adjusts the pressure swing cycles to a varying inlet gas quality and volume flow. That enables total control of the operator over the outlet gas purity (over 99%) or the desired heating value.

Especially operators of Waste or sewage plants which deal with always changing biogas qualities and flows, or those who want to shift spontaneously between the electricity and/or RNG markets to maximize income, profit from the clever designed process control system.

That‘s why the operation of the SmartCycle PSA is considered extremely simple and effortless. In addition, no other consumables than electricity are demanded, resulting in extremely low operating costs in any operational situation.

ETW built four large-scale SmartCycle PSA plants with an documented overall onstream time of more than 80,000 hours and 99 percent availability.

Interested operators can check out the performance of the plants in different Biomethane production sites across Germany. ETW will present the innovative Biogas upgrading technology at the Energy Decentral Fair from 15th to 18th November in Hannover, Stand nr. 24-A3.

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