Gas absorption Separating a carbon dioxide/air mixture by absorption in counterflow Features - separating a CO2/air mixture by absorption in counterflow - DURAN glass column with packed bed - safe operation due to use of water as the solvent and non-hazardous gases - regeneration of solvent by vacuum - gas analysis with hand-held measuring unit Learning objectives/experiments - 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 Specification [1] separation of CO2/air mixture by absorption in counterflow with water [2] production of gas mixture using CO2 from compressed gas cylinder and ambient air [3] adjustment of mixing ratio using valves [4] compressor for delivering the gas mixture into the absorption column [5] DURAN glass absorption column (packed bed) and desorption column [6] continuous solvent regeneration in circuit with desorption column under vacuum [7] 1 pump for desorption column and 1 pump for returning solvent to absorption column [8] water temperature control with heater and refrigeration system [9] refrigerant R513A, GWP: 631 Technical data Absorption column - height: 2x 750mm, inner diameter: 80mm Desorption column - height: 750mm, inner 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 Compressor - max. positive pressure: 0,6bar - max. flow rate: 62L/min Refrigeration capacity: 1432W at 5/32°C Refrigerant: R513A, GWP: 631 - filling volume: 600g - CO2-equivalent: 0,4t Measuring ranges - flow rate: -- 0,2...2,4Nm3/h (air) -- 50...600L/h (solvent) -- 0,4...5,4L/min (CO2) - temperature: 2x -200...100°C, 3x 0...120°C, 4x 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 LxWxH: 1920x790x2300mm Weight: approx. 290kg