In the biogas industry, the efficient removal of hydrogen sulphide (H₂S) is essential to ensure gas quality and equipment durability. A critical factor in this process is the particle size of the adsorbent used. PROMINDSA has developed MICRONOX ON16, a natural iron hydroxide which is ground to a particle size of 2 microns, thereby optimizing its adsorption capacity.
Why is particle size crucial in H₂S adsorbents?
Particle size directly influences the specific surface area of the material, known as the BET surface area. A larger BET surface area implies more active sites available to react with the H₂S present in the biogas, enhancing desulfurization efficiency.
Relationship between particle size and BET surface area
Reducing particle size increases the specific surface area exposed per unit mass. This allows for greater interaction between the adsorbent and sulphur compounds, which makes easier their capture and removal.
Impact on desulfurization efficiency
An adsorbent with smaller particles offers:
- Higher adsorption capacity: More active sites available to react with H₂S.
- Optimized reactivity: Faster and more complete interactions with sulphur compounds.
- Waste reduction: Greater efficiency means less adsorbent is needed, resulting in fewer residues generated.
MICRONOX ON16: Optimized natural iron hydroxide
MICRONOX ON16 is a product developed by Promindsa for desulfurization applications in biogas plants. Its production process includes precise grinding that reduces particle size to 2 microns, significantly increasing the BET surface area and, consequently, its adsorption capacity.
Advantages over other adsorbents
Compared to materials with larger particle sizes, MICRONOX ON16 offers:
- Superior efficiency: Greater H₂S removal per unit mass.
- Compatibility with anaerobic processes: Does not negatively affect the digester’s
microbiota.
- Greater dispersion capacity: Greater contact capacity with H2S inside the digester.
- Safety and sustainability: Natural, non-toxic, and easy-to-handle product.
Benefits of efficient biogas desulfurization
Proper H₂S removal in biogas entails multiple advantages:
- Equipment protection: Corrosion in pipes and motors is minimized, prolonging their shelf life, thanks to the fact that it does not affect the pH and prevents the generation of H2S.
- Elimination of bad odours: avoidance/removal of H2S inside the digester means that no bad odours are generated.
- Regulatory compliance: Reduces pollutant emissions, aligning with environmental regulations.
- Improved calorific value: Cleaner biogas is more efficient as an energy source.
Conclusion
At Promindsa, we understand the importance of particle size in desulfurization processes. MICRONOX ON16, with its 2-micron size, offers an effective and sustainable solution to improve biogas quality and the operational efficiency of plants.
Frequently Asked Questions
What is the BET surface area, and why is it important?
The BET surface area measures the total area available for adsorption in a material. A larger BET surface area allows for more interactions with the compounds to be removed, enhancing process efficiency.
How does MICRONOX ON16 compare to other adsorbents in terms of safety?
MICRONOX ON16 is a natural, non-toxic, and easy-to-handle product, making it safer compared to other adsorbents that may be corrosive or toxic. Furthermore, the MICRONOX ON16 does not generate hazardous waste.
Is MICRONOX ON16 compatible with all types of biogas plants?
Yes, MICRONOX ON16 is compatible with various biogas plants and can be easily integrated into different desulfurization processes.
How is MICRONOX ON16 applied in the desulfurization process?
MICRONOX ON16 is added directly to the anaerobic digester, where it reacts with the H₂S present in the biogas, facilitating its removal.
What impact does using MICRONOX ON16 have on operational costs?
By improving desulfurization efficiency and reducing equipment maintenance needs, MICRONOX ON16 can contribute to lower operational costs in biogas plants.
