• Checking the absorption degree with different liquid substances at different temperatures
  • Desorption of liquid phase into gaseous phase with a gas
  • Calculation of the number of theoretical stages
  • Investigation of the absorption process when separating gas mixtures in a packed column
  • Determination of pressure losses in the column
  • Representation of the absorption process in an operating diagram
  • Investigation of the variables influencing the effectiveness of absorption & desorption


  • Frame made of stainless steel
  • Process flow diagram in front of panel
  • Absorption column of Plexiglas
  • Feeding tank.
  • Plate Type Heat exchanger
  • Metering pump
  • Pneumatic control valves
  • Mass Flowmeter for water.
  • Mass Flowmeter for CO2.
  • Mass Flowmeter for air.
  • Differential pressure transmitter
  • Thermocouple with sheath along with electronic temperature indicator
  • Piping and valves of stainless steel (where necessary)
  • Safety devices and control for protection of system
  • Emergency push button
  • Autonomous pilot unit with computerized control software
  • UPS with significant backup to shut down the plant in the event of a power outage
  • Computer system for the Acquisition of data from plant
  • Data acquisition via USB under Window
  • Spares will be supplied for smooth operation for the period of 1 year.
  • The unit will be provided with all required accessories for smooth running, gases with cylinders (where required), calibration kits (if required), installation & after-sale services, maintenance services and operational manuals.

This absorption and stripping system enables to study the mass transfer from a gaseous phase to a liquid phase (absorption) and vice versa (Desorption)

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 counter flow 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 vacuum 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 2 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 analyzed.

The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Technical Data

Absorption column

  • Height: 2x 750mm,
  • Internal diameter: Approx. 80mm
  • Material: Plexiglas


  • Raschig rings
  • Size: Dia. 10mm
  • Length: 10mm
  • Material: Borosilicate Glass

 Desorption column

  • Height: 750mm,
  • Internal diameter: Approx. 80mm
  • Material: Plexiglas

Feed Tank

  • Capacity: 30L
  • Material: Plexiglas

Heated Tank

  • Capacity: 20L
  • Material: Plexiglas
  • Heater: 500W

Feed Pump

  • Max. flow rate: 10L/min
  • Max. head: 10m

Metering Pump

  • Max. flow rate: 5L/min


  • Max. positive pressure: 1bar
  • Max. flow rate: 5m³/h

Heat Exchanger

  • Type: Plate Type
  • Area: 0.5m2

 Flow rates:

  • air: Approx. 0.4~40 l/m
  • Solvent: 40~430L/h
  • CO2: 0.5~6L/min

 Measuring ranges

  • Temperature-100~400°C
  • Differential pressure: 0~2500Pa

Software CT-3303DSW

DAQ software specially designed in National Instrument™, LABVIEW™ environment to measure and calculate the results of apparatus. The software is optional and while using software a set of electronic sensors are included. Software can be run with any Windows™ environment.