Biogas, Renewable Natural Gas and Flare Treatment

Biogas and Renewable Natural Gas (RNG) produced from landfills and anaerobic digestion are growing in importance as a sustainable, eco-friendly source of energy for direct use, power generation, pipeline injection and vehicle fuel.    

Biogas purification is essential for its monetization.  NORIT® activated carbon is the premier choice of engineering firms, plant owners, and operators to remove unwanted impurities to meet pipeline specifications and ensure the protection of process equipment including membranes, compressors, engines and turbines, pipelines and fuel cells.

Hydrogen Sulfide (H₂S) removal

H₂S removal is needed to eliminate foul odors, poisons, corrosiveness, and flammability.

Siloxane removal

Siloxane removal is needed to prevent damage, destruction and reduced efficiency to engines, turbines, fuel cells and catalysts.

Volatile Organic Compounds (VOC) removal

VOCs need to be removed from biogas to minimize damage to membranes and reduce SO₂ and NOx emissions.

Nitrogen rejection

Nitrogen rejection is needed to maintain proper BTU levels of the gas and meet stringent pipeline requirements.

H₂S Removal with DARCO BG1

NORIT's DARCO BG1 is a leading solution for removing hydrogen sulfide (H₂S) from vapor phase gas streams, ensuring cleaner and safer biogas and renewable natural gas (RNG). This non-impregnated, lignite-based, granular, steam activated carbon is designed for high sulfur loading, effectively reducing H₂S to elemental sulfur and removing mercaptans and siloxanes. Its extensive surface area and pore structure make it highly efficient. DARCO BG1 is safe, non-exothermic, and easy to change out, making it a reliable choice for various applications.

Activated Carbon Granules Small


NORIT activated carbon products also remove these contaminants from flare gas at landfills, wastewater treatment plants, and farm digester plants. NORIT provides the lowest-cost solution to meet stricter air emission permit limits.


NORIT technical sales and application support teams provide top-notch guidance on appropriate carbon Solutions, vessel sizing, and ongoing technical support. Our application knowledge and expertise is always available to address you purification needs. We look forward to becoming your activated carbon partner.

Analysis and recommendation of your activated carbon needs

Vessel sizing

Analysis of spent activated carbon

Specific containment removal application information

Support for trials of activated carbon

Product information and samples


Five Key Steps white paper

White Paper

5 Key Steps to Size Activated Carbon Vessels for Optimal H2S Removal

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White paper Spent Carbon

White Paper

Fate of Spent Specialty Non-Impregnated Activated Carbon in Landfills.

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Video Series Webpage-1

Educational Video Series

Learn about activated carbon, adsorption fundamentals, and the value it creates in purifying RNG and biogas.
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DARCO BG 1 Data Sheet

DARCO BG1 Info Sheet

Get the lowest $/lb of H2S removed and personalized technical support for your biogas purification needs.
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SCS case study

Case Study

SCS Energy substantially reduced costs, saved time, and significantly increased H2S loading capacity.
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Case Study Casella

Case Study

Casella removed more H2S while using less media and requiring fewer change outs. 
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