Iron products for effective
desulfurization of biogenic gases
There are several types of iron-based products available to lower H₂S levels within various stages of the biogenic gas cleaning process, each with its own advantages and disadvantages (iron hydroxide, ferric chloride, ferric sludge, iron oxide, etc.). In addition to our extensive range of activated carbon products, we therefore also offer iron hydroxide and iron extrudate solutions.
Iron hydroxide combines performance and safety without compromising the installation or the quality of the digestate. It is specifically designed to reduce hydrogen sulfide (H₂S) levels in biogenic gases directly within the fermenter. It is introduced along with the fermentation substrates. Our high-quality products are made from naturally sourced iron, partially processed, with exceptional purity.
Iron extrudate is used to efficiently remove hydrogen sulfide during the filtration process, ensuring optimal gas purification
The properties of our iron products in detail:
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| Type Product | Biogas | H₂S | Siloxane | VOCs | Information | |
|---|---|---|---|---|---|---|
| FERROXA+ | Fast and efficient H₂S reducer based on iron hydroxide. | X | X | Fast-action iron hydroxide powder. Ideal for quickly addressing issues caused by excess H2S in fermentation processes. | ||
| FERROXA | Preventive and long-lasting H₂S reducer with high stability, based on iron hydroxide. | X | X | Concentrated iron hydroxide powder with high stability. Suitable for preventing H2S formation issues. | ||
| FEPS | Specialty product for desulfurization within filtration systems | X | X | Iron in pellet form (FeO(OH)) for desulfurizing technical gas streams. |
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Ferroxa and Ferroxa+ for coarse desulfurization within the fermenter
Iron hydroxide is introduced along with fermentation substrates to reduce hydrogen sulfide (H2S) during fermentation. Ferroxa and Ferroxa+ are pure natural iron hydroxide product. Due their high iron content, the extra amount of material added into the fermenter is low, and because of the purity of Ferroxa and Ferroxa+, there are no additional sediments.
FERROXA is a pure, natural iron hydroxide that effectively and preventatively reduces the formation of hydrogen sulfide (H₂S) in the digester. The purity of FERROXA eliminates the need for additional sediment input. It does not originate from water treatment processes and, therefore, contains virtually no heavy metals.
FERROXA+ is a blend of iron hydroxide (25%) and synthetic iron (40%). Its unique composition and high iron content (32%) enable a very rapid curative action to reduce H₂S levels. To ensure long-lasting effectiveness, FERROXA+ is always used in conjunction with FERROXA at a ratio of 1 volume of FERROXA+ to 2 volumes of FERROXA.
Product properties:
- Easy and safe to use
- Non-hazardous material
- No corrision
- Very high iron content
- Natural product with a very low heavy metal content
- No sedimentation from extra material input in the fermenter
- Free-flowing and low-dust
- Dry and easy storable
- Fast acting & problem solving (Ferroxa+)
- Long term & preventative (Ferroxa)
FEPS: Specialized solution for desulfurization during filtration.
FEPS are iron pellets with which hydrogen sulphide can be effectively removed from technical and biogenic gases. It has been specifically developed for the removal of hydrogen sulfide from technical and biogenic gases within activated carbon adsorbers. It is composed of highly amorphous iron oxide, which efficiently and safely eliminates trace gases. Its highly porous structure provides a very high loading capacity, making FEPS a cost-effective solution. The uniformly shaped, pressure-resistant pellets ensure a low and consistent pressure drop within the packed bed.
Product properties:
- Very effective, high concentration of amorphous iron
- Safe handling, non-combustible, and easy to use
- No additional process steps necessary!
- High loading capacity with hydrogen sulphide possible!
- Uniform pressure loss due to homogeneous pressure-resistant pellets!
- Easy disposal - no hazardous waste!
- Stable, low incidence of dust, easy storable
Good to know
The SILOXA difference
SILOXA provides industry-leading solutions for the efficient and sustainable filtration, conditioning, and drying of biogas, sewage gas, and landfill gas. With our innovative product range, wide selection of cost-effective and specialized activated carbon, and comprehensive ‘one-stop-shop’ services, we not only help you to maximize the profitability of your biogenic gas plant, but also support your contribution to the energy transition.
Why work with us:
- Years of experience and expertise: benefit from our knowledge, even under complex circumstances.
- Superior product quality: our experience and continuous development, helps us maintain the highest standards.
- Individual consultation and planning: our engineers are able to create tailored concepts and solutions.
- Comprehensive services: from planning and installation to consultation, let us take care of everything running smoothly.
- Sustainable solutions: we stand for resource-efficient products and processes.
- Increased profitability: efficient biogenic cleaning reduces operating costs and boosts your profitability.
- Optimal plant performance and gas quality: our systems help you achieve the highest output quality.
- Reliable partnership: we foster collaborative relationships based on mutual respect
Choose SILOXA for quality, efficiency, and sustainability! Contact us today for a free, no-obligation consultation.