Adsorption

Flue gas/exhaust air purification

Adsorption

Describes the accumulation of gases or liquids on the surface of a solid.

This includes various plant systems. The pollutants are adsorbed by a reactant or a solid such as calcium carbonate, activated carbon, etc. or a porous structure and are discharged and disposed of with the solid.

Cascade system

The fluorine scrubber is a classic cascade system that is used in the ceramic or heavy clay industry, among others. The system adsorbs hydrogen fluoride (HF), hydrogen chloride (HCl) as well as sulphur oxides (SO2 and SO3). This system reaches its limits at higher sulphur oxide or hydrogen chloride values due to the limited absorption capacity of the calcium carbonate granulate (CaCO3) used.₂ und SO₃) ab. Dieses System findet seine Grenzen bei höheren Schwefeloxid oder auch Chlorwasserstoffwerten aufgrund der begrenzten Aufnahmekapazität des verwendeten Kalziumcarbonatgranulats (CaCO₃).

Filtration system

Filtersysteme mit Reagenteintrag in Form von Kalziumhydroxid (CaOH₂), Kalziumbicarbonat (Ca(HCO₃Filter systems with reagent input in the form of calcium hydroxide (CaOH2), calcium bicarbonate (Ca(HCO3)2) are used when pollutant compositions with high concentrations of sulphur oxide or hydrogen chloride are present. To remove other pollutants such as mercury (Hg), activated carbon or hearth furnace coke (HOK) can also be added as an additive for reduction.

Activated carbon system

Depending on the application and pollutants, different activated carbons are used to remove the relevant pollutants. These systems are often, but not exclusively, realized as fixed bed systems.

Concentration system

Adsorber systems for concentrating hydrocarbons are designed either as a fixed bed reactor or as a wheel. Here, the pollutants accumulate at a low concentration from a large volume flow on a porous structure. The pollutants are then desorbed again by means of a lower volume flow at a higher temperature and subsequently recovered or thermally destroyed.