Biogas containing hydrogen sulfide (H2S) is problematic for any form of gas utilization, whether for boiler steam generation, engine power generation, renewable natural gas (RNG) production, or even meeting emissions standards from a flare. H2S is also strictly regulated by gas utilities, making H2S removal from biogas a critical step before it hits the pipeline. Given its corrosive nature, H2S can be detrimental to pretreatment and upgrading equipment, requiring high-spec materials, specialized coatings, shortened maintenance intervals, and a higher probability of premature equipment failure. In the RNG market, H2S removal is often the highest operational expense in upgrading raw biogas to pipeline quality.
In our premier H2S absorbent, FerroSorp®, iron hydroxide is the crucial ingredient that attracts the H2S. It is then chemically changed into elemental sulfur, which attaches to the inside of the FerroSorp® pellets. Iron hydroxide-based media natively contains 25% more oxygen per iron atom than traditional iron oxide-based medias. This higher oxygen content within the media is responsible for effective H2S treatment without needing additional oxygen from the gas stream.
In conjunction with the VAV bulk media vessel, hydrogen sulfide removal with FerroSorp is easier and more cost-effective. FerroSorp absorbs more sulfur than competitors’ media, extends change-out intervals, and lowers the overall cost of operations. VAVs are designed for gas to flow through the entire bed, evenly utilizing the media while maintaining low-pressure drop. Another significant aspect of the VAV is its ease of installation and rapid deployment. VAVs are dispatched quickly and can easily be implemented in new or pre-existing sites.
As VAVs require no pad or infrastructure to deploy, placing one right at the digester, lagoon, or wellhead is as easy as plug-and-play. Rated for full vacuum and serviceable by hydraulic truck, there isn’t a more convenient or flexible H2S scavenger system in the industry for making your biogas clean and safe.
Interra Global customizes comprehensive H2S scrubbing solutions for landfill gas, livestock/dairy sites, food waste digesters, & other applications. Our engineering and support teams are here to help you work through unique site specifications and ensure FerroSorp H2S removal media and the VAV are the right H2S removal technologies for your application.