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Mobile bed adsorber

3-D Zeichnung Mobile bed adsorber

LUEHR mobile bed adsorbers are used for the adsorption of gaseous pollutants such as

  • heavy metals, i.a. mercury
  • hydrocarbon compounds
  • gaseous inorganic substances such as HCl, SO2, H2S

at grainy activated carbon/-coke or other coarse-grained sorbents

The excellent separation efficiency allows the reliable observance of extremely low emission limit values for the stated pollutants even in case of high input concentrations.

Advantageous features of LUEHR mobile bed adsorbers:

  • simple plant technology with low maintenance
  • low investment and operating costs
  • reliable observance of the requested residual concentrations in the clean gas at good utilisation of adsorbing agent i.a. due to a homogeneous inlet flow distribution over the complete gravel bed area and a homogeneous discharge of adsorbent over the whole adsorber area.
  • low pressure loss, i.a. due to uniform flow distribution across the entire bed area
  • depending on the application, selection of a variable bed thickness between approx. 500 and 1,000 mm
  • high reliability i.a. due to a homogeneous flow across and through the entire bed material of adsorber


  • Volume flows up to max. 10,000 Am³/h in one unit
  • Volume flows of 10,000 Am³/h up to approx. 40,000 Am³/h by parallel arrangement of several single units

Criteria for application

  • Particle contents in the gas flow upstream adsorber < 5 mg/Nm³. To ensure that an early, partial replacement of adsorbent material does not become necessary as a result of an excessive pressure drop but only after saturation of adsorber material, it might be necessary to install a LUEHR flat-bag filter for the particle separation upstream of mobile bed adsorber.
  • Gas temperatures < 150 °C

Handling of sorbent material

  • The replacement of granular sorbent takes place during disconnected admission after saturation of material. The adsorber material is partly or completely discharged via collection hopper and manual damper by means of manual operation of discharge grid. The new material is filled from above out of adequate transport container (e.g. Big Bag) and homogeneously distributed over the entire bed area.
  • On request, the partial or complete discharge of saturated material as well as the filling with new adsorbent can be automated.