Mercury is often emitted from thermal treatment installations during brief periods creating extremely high mercury concentration spikes in untreated flue gases. Many traditional flue gas cleaning systems have limited buffer capacity, which means such concentrations cannot be reduced as much as desired. In such cases, or in applications in which the mercury content in untreated flue gas is usually high, the MERCOX™ process is an effective cleaning system or an excellent complement

The MERCOX™ process is especially competitive in applications with a high proportion of metallic mercury in the flue gas. Examples of such applications are:

  • Sludge incineration
  • Smelting plants
  • Incineration of hazardous waste
  • Thermal soil remediation
  • Industrial processes

The process can also be combined with ADIOX® tower packing material for dioxin removal and/or energy recovery through flue gas condensation.

When incinerating materials containing mercury, the mercury is emitted with the flue gases almost in its entirety. Flue gas composition and temperature changes affect the mercury's ultimate distribution between metallic mercury (non-water soluble) and mercury oxides (water soluble). Conventional wet flue gas cleaning systems only remove the water-soluble forms. It is often necessary to supplement the process with e.g. activated carbon dosage or a MERCOXTM unit.

MERCOXTM technology uses an eco-friendly oxidizing agent to oxidize the metallic mercury into a water-soluble form. The various compounds of mercury can then be absorbed in the scrubbing liquid together with hydrochloric acid and sulfur dioxide. Acidic discharge water containing mercury is led from the scrubber to water treatment for neutralization and mercury removal.

We can deliver MERCOXTM as a stand-alone process or as part of a larger gas cleaning system in a scrubber package, or in a conversion of an existing scrubber system.

MERCOXTM advantages:

  • Allows higher mercury levels in fuel
  • Provides cost optimization thanks to multiple functions in a single unit (e.g. integrated SO2 and HCl removal.
  • Effective for concentration spikes due to large buffer capacity.
  • Eco-friendly oxidizing agent.
  • Low residual products costs as the amount of residual products is small.
  • High reliability
  • Competitively priced