Soil vapor remediation is a commonly used method to remove volatile organic compounds (VOCs) from the unsaturated soil zone. This is the soil area where the pore volume is usually only partially saturated with water and where there is no waterlogged or saturated groundwater.
Platinum and palladium catalysts in use
Substances that can be removed from the soil in practice include gasoline, PAHs, BTX, halogenated hydrocarbons, and others. After extraction, the concentrations are in the percentage range and below, and are usually totally oxidized catalytically. The precious metal catalysts used are highly active due to their high platinum and palladium content and are particularly robust against halides, which are themselves catalyst poisons.
C&CS designs total oxidation processes for environmental companies (catalyst type, honeycomb/metal/bulk, temperature, flow rate, admixture, efficiency, autothermal) and supplies suitable catalyst material. Alternatively, in special cases, adsorption processes using activated carbon and other materials are possible.
For the purification of soil air contaminated with chlorinated hydrocarbons (CHCs) by total oxidation. Due to its high chlorine tolerance, this proven catalyst is also
