Pelletized hydrogen sulfide scavenger FerroSorp® S

The problem

Hydrogen sulfide in bio- and digester gas when used thermally leads to environmental pollution and corrosion problems in pipes and internal-combustion engines.

The solution

A pelletized adsorption compound based on iron-hydroxide chemically binds the hydrogen sulfide and thus removing it from the gas. The material is continuously regenerated by adding aerial oxygen. This achieves high loading rates of more than 30% by mass.

The method

The hydrogen sulfide containing sewage- or biogas is passed through a tower-shaped or similar desulfurizer with the pelletized hydrogen sulfide scavenger. A chemical reaction between the gaseous hydrogen sulfide and the iron hydroxide in the desulfurization pellets produces solid iron sulfide. It is common practice to add aerial oxygen which results in a continuous regeneration of the absorption material by forming elemental sulfur.


The pelletized hydrogen sulfide scavenger “FerroSorp® S” can be of particular benefit when used for the following gas treatment processes:

Desulfurization of:

Some siloxane compounds will be removed too.

The reactions

The equations for the chemical processes taking place during loading and regeneration of the desulfurization pellets can be found in the following scheme.

The benefits at a glance

Brochure FerroSorp® S [95 KB]