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Adsorption Research, Inc. (ARI)
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  5. ARI - Model AdvanSorb RNG - Processing ...

ARI - Model AdvanSorb RNG -Processing Technologies

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Biogas, and even traditional natural gas,?frequently has contaminants that need to be removed?to?purify it to its maximum energy and economic potential. ARI’s?AdvanSorb®-RNG?processing technologies make it possible to take in virtually any feed gas specification, virtually?deliver?any product gas specification?efficiently, effectively, and economically.

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  • ARI’s?AdvanSorb®-RNG upgrading process consists of 2 distinct processes/systems.
  • ARI’s?AdvanSorb®-RNG CO2+?process, removes pre-treatables?(H2S, VOCs, Siloxanes), carbon dioxide and residual water
  • ARI’s?AdvanSorb®-RNG NRU+?process, removes nitrogen and oxygen

Upgrading biogas to RNG requires the removal of?a number of?contaminants?that?are efficiently removed via two distinct PSA cycles/systems.??The first (CO2+) removes the contaminants that are heavier than methane.??The second (NRU+) removes the contaminants that are lighter than methane. These two systems can be purchased together or separately. However, efficiencies exist when used together.

*NRU = Nitrogen Rejection Unit

Using ARI’s AdvanSorb®?processing technology for Renewable Natural Gas or Natural Gas purification means that your system is:

  • Robust:?All contaminants can be removed to meet any gas specification
  • High Recovery:?More of your finite resource can be monetized
  • Efficient:?Relatively low operating cost means more profit and faster payback
  • Customizable:?Utilize our modular design, or customize to meet your specific needs
Constituent Typical % In Feed To System      Typical Pipeline Specification
Methane 50.00% > 95.5%
Carbon Dioxide 39.35% < 2%
Nitrogen 8.00% < 4%
Oxygen 1.50% < 0.2%
Water 1.00% < 0.0147%
Hydrogen Sulfide 0.00% < 0.0004%
VOCs + Siloxanes         0.15% Varies

*Note that Digester Gas is Typically Predominantly Methane & Carbon Dioxide with less Nitrogen & Oxygen, and more Hydrogen Sulfide.

Contaminant  Typical Technology         ARI AdvanSorb®--RNG Process 
VOCs + Siloxanes        Pretreatment  ARI AdvanSorb®-CO2+ System 
Hydrogen Sulfide  Pretreatment  ARI AdvanSorb®-CO2+ System 
Carbon Dioxide CO2 Removal  ARI AdvanSorb®-CO2+ System 
Water CO2 Removal ARI AdvanSorb®-CO2+ System 
Nitrogen Nitrogen Removal  ARI AdvanSorb®-NRU+ System 
Oxygen Varies  ARI AdvanSorb®-NRU+ System 

ARI’s AdvanSorb®-RNG 2-Stage process removes biogas pre-treatables (VOCs, siloxanes, H2S), CO2, residual water,?nitrogen?and oxygen over the course of?two?stages. ??It utilizes?Vacuum Pressure Swing Adsorption (VPSA)?process technology?developed and patented by ARI. ?There are?minimal?technical limitations?with inlet (e.g. gas compositions, flow rates, etc.)?and?product parameters. ?Selecting ARI’s?AdvanSorb®-RNG?Two-Stage system provides you with a single-source gas upgrading technology provider?who?uses a common upgrading?(VPSA)?process?of their own design?and?are committed to?continuous improvement.

At the Landfill:?

Can remove VOCs, siloxanes, hydrogen sulfide, water and carbon dioxide, nitrogen, and oxygen.?

  • Allows for greater suction on the landfill, which means?more methane,?lower fugitive?emissions, less?odors, and?vastly reduced?well-tuning?
Process:

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

  • Removes contaminants to produce high-yield, high-purity,?RNG
  • Moderate operating pressure means significant savings in CAPEX & OPEX compared to other technologies

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
Economics:

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

  • Flexible technology can be?designed?to best suit site infrastructure
  • AdvanSorb®-RNG 2-Stage process allows for 96.5%+?methane recovery and purity
  • ARI’s AdvanSorb®-RNG 2-Stage process?can allow you to maximize system revenue, by optimizing product recovery and purity, while also keeping?a low?total cost of ownership.