AdvanSorb®-RNG CO2+

ARI AdvanSorb®-RNG CO2+ Process

ARI’s AdvanSorb®-RNG CO2+ process combines biogas pre-treatment (VOCs, siloxanes, H2S) and CO2 removal in one stage.  Vacuum pressure swing adsorption (VPSA) is used to separate the valuable bio-methane from the impurities.  When the partially upgraded bio-methane requires nitrogen and oxygen removal to become saleable RNG, the gas is sent to our AdvanSorb®-RNG NRU+ process.

System Features, Benefits, & Capabilities


Patented, reliable, and highly efficient multi-stage Vacuum Pressure Swing Adsorption (VPSA) process. Upgrades feed gas to RNG.

  • Combines pre-treatment with CO2 and residual water removal in a singlestage.
  • Removes contaminants to produce high-yield, high-purity RNG
  • Low operating pressure and low recycle translate to low feed compression demand (reduced CAPEX & OPEX) compared to other technologies
  • Long-lived, regenerable media means fewer changeouts and reduced OPEX.
  • Control system utilizes ARI’s proprietary adaptive control logic.
  • Compensates for fluctuations in feed flow, composition and ambient conditions–keeping product on-spec
  • Allows for data logging, trend analysis, and remote access to maintain peak performance
  • User-friendly training provided for operators & engineers


The ability to meet pipeline-grade natural gas, compressed natural gas (CNG), or liquid natural gas (LNG) specifications.

  • Flexible technology can be laid out to best suit site infrastructure
  • AdvanSorb®-RNG CO2+ process allows for 98%+ methane recovery and purity
  • ARI’s AdvanSorb®-RNG CO2+ process can allow you to maximize system revenue, by optimizing product recovery and purity, while also keeping a low total cost of ownership.
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