The Kombisorbon® process is designed for the removal of:

  • heavy metals, in particular mercury and cadmium
  • dioxins and furans
  • other ecotoxic organic components

from waste gases.

Typical raw gas conditions:

Gas temperature up to 90°C
Dust 2 - 10 mg/m³
Mercury up to 10 mg/m³
Dioxin/Furan (TE)

up to 30 ng/m³

Clean gas criteria (new MACT emission standards for new FBIs (USEPA 2011): at 7% O2):

Mercury < 1 µg/m³
Dioxin/Furan (TE)

< 0.004 ng/m³

The Kombisorbon® system generally uses a conditioner and a fixed-bed adsorber .

The conditioner includes a coalescer, a droplet separator and a heat exchanger to condition the flue gas to reach optimal parameters before entering the adsorber.

Activated carbon is known for its excellent pollutant removal capabilities. Carbon Process & Plant Engineering S.A. (CPPE) has an adsorbent which offers all the advantages of activated carbon while, at the same time, eliminating its known drawbacks, especially its fouling tendency.

CPPE’s Kombisorbon® process offers the following key advantages:

  • Removal of ionic mercury known as Hg2+ through adsorption as HgCl2 on the activated carbon
  • Elemental mercury known as Hg0 by forming with the sulphur on the carbon mercuric sulphide known as HgS
  • Removal of dioxins and furans through absorption.

System design is tailored to the specific application, with the focus on meeting project-specific objectives for Hg and dioxin removal.

By modifying the activated carbon, e. g. through impregnation, the adsorbent can be adapted to a great variety of applications.

Typical applications are sewage sludge or hazardous waste incineration plants. The first commercial-scale Kombisorbon® unit, was installed in a sewage sludge incineration plant in 1994. Since that time more than 20 units have been put into operation worldwide.

Simplified Kombisorbon® process

One stage Sulfacid<sup>®</sup> plant