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. 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. 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. 

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 gas samples can be analysed using the hand-held measuring unit supplied. 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. 

Specification

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

Separation of CO2/air mixture by absorption in counterflow with water

Water temperature control with heater and refrigeration system

Production of gas mixture using CO2 from compressed gas cylinder and ambient air

1 pump for desorption column and 1 pump for returning solvent to absorption column

Refrigerant R513A, GWP: 631.

Technical data:

Absorption column

Height: 2x 750mm, inner diameter: 80mm

Desorption column

Height: 750mm, inner diameter: 80mm

Compressor

Positive pressure: 2bar

Flow rate: 39L/min

Refrigeration capacity: 1432W at 5/32°C

Refrigerant: R513A, GWP: 631

Filling volume: 600g

CO2-equivalent: 0,4t

2 pumps (absorption/desorption)

Flow rate: 17,5L/min

Head: 47m

1 pump (cooling)

Flow rate: 29L/min

Head: 1,4m

Measuring ranges

Flow rate:

0,2…2,4Nm3/h (air)

50…600L/h (solvent)

0,4…5,4L/min (CO2)

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

Dimensions and weight

LxWxH: 1920x790x2300mm

Weight: approx. 290kg.