Gas absorption CE 400

Gas absorption

Type: CE 400
Name: Gas absorption


Absorption is used to remove one or more gaseous components from a gas flow using a solvent.

First of all, a CO2 and air gas mixture is produced. It is possible to adjust the mixing ratio using valves. The flow rates of the gas components are displayed.

A compressor delivers the gas mixture into the lower section of the absorption column. In the column, part of the CO2 is separated in the counterflow with the solvent. Water is used as the solvent. The CO2 is absorbed by the downward flowing water. To separate the absorbed CO2, the charged water is then fed from the lower section of the absorption column into a desorption column. As the pressure is reduced and the temperature is increased, the solubility of the CO2 falls. A heater heats the water. A water jet pump generates negative pressure in the desorption column and causes the CO2 gas to be emitted from the water. A pump then delivers the regenerated solvent back into the absorption column.

The water temperature can be controlled. Flow rate, temperature and pressure are continuously measured. The two-section column is equipped with connections to determine the pressure losses. The pressure loss in the respective sections can be displayed via two U-tube manometers. To evaluate the success of the process, the trainer includes outlets for taking gas and liquid samples. The gas samples can be analysed using the hand-held measuring unit supplied.

Technical details

  • separation of CO2/air mixture by absorption in counterflow with water
  • production of gas mixture using CO2 from compressed gas cylinder and ambient air
  • adjustment of mixing ratio using valves
  • compressor for delivering the gas mixture into the absorption column
  • DURAN glass absorption column (packed bed) and desorption column
  • continuous solvent regeneration in circuit with desorption column under vacuum
  • 1 pump for desorption column and 1 pump for returning solvent to absorption column
  • water temperature control with heater and refrigeration system
  • Technical data

    Absorption column

    • height: 2x 750mm, internal diameter: 80mm

    Desorption column

    • height: 750mm, internal diameter: 80mm

    2 pumps (absorption/desorption)

    • max. flow rate: 17,5L/min
    • max. head: 47m

    1 pump (cooling)

    • max. flow rate: 29L/min
    • max. head: 1,4m


    • max. positive pressure: 2bar
    • max. flow rate: 39L/min

    Measuring ranges
    • flow rate:
      • air: 0,2…2,4Nm³/h
      • solvent: 50…600L/h
      • CO2: 0,4…5,4L/min
    • temperature: 1x 0…80°C, 2x 0…60°C
    • pressure: 1x 0…2,5bar, 1x -1…0,6bar
    • differential pressure: 2x 0…250mmWC
    • CO2-content: 0…100vol%

    230V, 50Hz, 1 phase
    230V, 60Hz, 1 phase
    230V, 60Hz, 3 phases
    UL/CSA optional

    Dimensions and weight

    LxWxH: 1920x790x2300mm
    Weight: approx. 290kg

    Required for operation

    CO2 gas cylinder with pressure reducing valve
    water connection, drain