Adsorptive air drying Basic principle of adsorption and desorption Features - adsorptive drying of humid air - continuous process with regeneration of adsorbent - transparent columns and adsorbent with indicator to observe the mass transfer zone - GUNT software with control functions and data acquisition Learning objectives/experiments - fundamental principle of adsorption and desorption - investigation of the variables influencing adsorption and desorption -- air flow rates -- air humidity and temperature -- bed height of adsorbent - depiction of the processes in a h-ω diagram - plotting of breakthrough curves and determination of breakthrough time Specification [1] continuous adsorptive air drying [2] 2 columns for alternating charging and regeneration of the adsorbent [3] observation of mass transfer zone by using transparent columns and adsorbent with indicator [4] 2 compressors to deliver the feed air and regenerative air out of the ambient atmosphere [5] humidification of the feed air by flowing through a water bath [6] circular system with pump and refrigeration system to adjust the water bath temperature [7] adjustment of relative humidity and temperature of feed air by heater [8] heater for temperature adjustment of the regenerative air [9] adjustment of regenerative air and feed air flow rates by valves [10] GUNT software with control functions and data acquisition via USB under Windows 10 Technical data 2 columns - Ø approx. 80mm - height: approx. 800mm 2 compressors - max. positive pressure: 1bar - max. flow rate: 8m3/h Humidifier pump - max. flow rate: 600L/h - max. head: 1,5m Refrigeration system - refrigeration capacity: 395W at temperature difference 10K / 250L 2 electric air heaters - power output (feed air): 160W - power output (regeneration): 2x 250W Measuring ranges - flow rate: 2x 0...10Nm3/h - temperature: 3x 0...50°C; 1x 0...200°C, 1x -25...125°C (air) - rel. humidity: 4x 0...100% - temperature: 1x 0...50°C (water) 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 230V, 60Hz, 3 phases UL/CSA optional LxWxH: 1390x750x1890mm Weight: approx. 150kg