Biogas Iron oxide
Services We Provide
Enhancing biogas production efficiency
Premium Iron Oxide Powder
Our Premium Iron Oxide Powder are engineered specifically for biogas plants, enhancing the desulfurization process by efficiently removing hydrogen sulfide from biogas. These granules are produced using high-quality raw materials, ensuring optimal performance and longevity. With a consistent particle size and excellent reactivity, our granules facilitate a smooth and effective operation, allowing your biogas plant to reach its maximum potential. Choose our Premium Iron Oxide Granules for a reliable solution that supports sustainable energy production and reduces operational costs. Experience the difference in quality and efficiency with our specialized products.
Key Benefits
Technical Features
Application & Use Cases
Key Benefits
Effective H₂S Removal:
Eliminates hydrogen sulfide from biogas, landfill gas, and digestor gas to protect engines, CHP units, and upgrading membranes. Capable of reducing H₂S to ppmv levels to meet stringent biomethane grid specs or engine manufacturer limits.
High Capacity & Long Life:
Our media has an exceptional sulfur loading capacity – up to 45% of its weight in H₂S sulfur under optimal conditions . This means fewer changeouts and lower operating cost. In real-world terms, a single fill can often last 6–12+ months (depending on H₂S levels), significantly outlasting conventional iron sponge media.
Cost-Efficient:
Delivers a low cost per kg of H₂S removed, often 20–30% lower than standard activated carbon or iron sponge . By maximizing usable capacity and minimizing downtime, it reduces total cost of ownership. Each kilogram of our media can neutralize ~0.3–0.45 kg of H₂S, translating to industry-leading efficiency.
Safe and Environmentally Friendly:
The media is non-toxic, non-corrosive, and non-flammable in both fresh and spent forms . Spent media primarily contains iron sulfide and elemental sulfur – classified as non-hazardous waste in most cases (local regulations may vary). No liquid effluents or caustic chemicals required – a dry process that is environmentally benign.
Robust Performance:
Functions effectively across a range of conditions – high or low H₂S concentrations, varying humidity (up to ~90% RH), and with or without oxygen in the gas. The media is highly selective for H₂S; it won’t be consumed by CO₂ or benign components. It also tolerates typical biogas impurities (e.g. siloxanes, VOCs) without significant loss of activity .
Minimal Pressure Drop:
Engineered as uniform spherical or extruded pellets with controlled porosity, ensuring low pressure drop across the bed. This preserves blower efficiency and is especially important for high-flow or low-pressure applications (e.g. 5–10 mbar pressure drop in properly sized vessels).
Easy to Use:
Media can be used in simple fixed-bed vessels (vertical or horizontal). Operation is as easy as flowing biogas through the media – no special operator attention or continuous adjustments needed. Our media doesn’t require nutrient dosing or water, unlike biological scrubbers, and it isn’t prone to channeling or “hot spots” like some granular activated carbons .
Versatile Applications:
Suitable for agricultural biogas digesters, WWTP digesters, landfill gas, food waste biogas, and biomethane upgrading plants.
Technical Features
Composition :
Iron-based oxide/hydroxide adsorbent on a durable support (pelletized form). The active ingredient reacts with H₂S to form iron sulfide and elemental sulfur . In presence of oxygen (which can be injected or naturally present up to a few %), a portion of the sulfur is oxidized to elemental form, regenerating the iron oxide for extended use .
Reaction Capacity :
~450 mg H₂S per g of media (theoretical maximum with intermittent regeneration) . In fully anaerobic operation, typical one-pass capacity is 150–250 mg/g (15–25% by weight), depending on moisture and gas contact time. This is on par or better than leading competitors (SulfaTreat ~10% , wood iron sponge 12–26% , activated carbon ~30% ).
Physical Form:
4–6 mm pellets (or granules) with bulk density ~0.8 kg/L. Packaged in airtight drums or big bags to prevent premature exposure. Color changes from brown to black upon saturation, providing a visual indication of media status .
Operating Conditions:
Gas flow can be at low pressure (near atmospheric up to ~5 barg). Optimal temperature 20–40°C (typical biogas output temp). Gas humidity: works dry, but 5–50% relative humidity can actually enhance performance (moisture helps kinetics). If biogas is very dry, a humidifier or water spray can be used upstream (if feasible) to optimize reaction – though not strictly required.
Byproducts & Disposal:
The reaction produces water and sulfur. Spent media will contain iron sulfide (FeS) and elemental sulfur; no liquid sulfates or acids are generated in the gas phase. Spent media should be handled in open air to oxidize any FeS to Fe₂O₃/elemental S fully (preventing any odor). It can often be disposed of as a non-hazardous solid – for example, some users land-apply it in small quantities or send to landfill (always check local waste regulations).
Applications & Use Cases
Biogas CHP Plants :
Removal of H₂S to less than 100 ppm (often less than 50 ppm) to prevent corrosion in gas engines and exhaust. By using our media upstream of the engine, operators can extend oil change intervals and engine overhauls – saving significant maintenance costs. Typically used in a single vessel sized for ~6–12 month replacement cycles.
Biomethane Upgrading:
Polishing biogas to less then 5 ppm H₂S before membrane or PSA upgrading. Ensures that high-value biomethane is not contaminated and that upgrading equipment (membranes, compressors) are protected from H₂S and sulfur deposition. Our media’s ability to hit low outlet targets and handle surges in H₂S makes it ideal for this application. Often configured in a lead-lag vessel arrangement to guarantee absolute removal (the lag vessel stays fresh as a guard bed).
Odor Control & Safety:
Many biogas facilities need to abate H₂S odors for safety and environmental compliance. A small side-stream scrubber with our media can treat vent gas or pressurize rooms by removing H₂S, eliminating that “rotten egg” smell and ensuring worker safety (H₂S compliance).
Landfill Gas to Energy:
Landfill gas typically has H₂S in the 50–300 ppm range and siloxanes. Our iron media can be used as a pre-treatment in combination with activated carbon beds – it will knock out the majority of H₂S, allowing downstream carbon to focus on VOC/siloxane removal without getting saturated by sulfur. This significantly lowers total media costs in LFG applications.
Wastewater Digesters:
Sewage sludge digesters produce biogas with H₂S that can fluctuate. Our media can handle these swings and is perfect for sewage plant CHP units. It avoids the use of hazardous chemicals (like NaOH or NaOCl scrubbers) on site and can be simply contained in a vessel next to the digesters. Utilities appreciate the dry, simple operation.
