Absorption Column Calculator
Design a packed absorption column: calculate diameter, packing height, number of transfer units (NTU), and pressure drop.
Inputs
m³/hr
mol fraction
mol fraction
m³/hr
1/m
Results
Column Diameter
0.49 m
Packing Height
1.7 m
Number of Transfer Units (NTU)3.09
Height of Transfer Unit (HTU)0.55 m
Pressure Drop85.08 Pa/m
How to Use This Calculator
- Enter the Gas Flow Rate in m³/hr and the Inlet and Outlet Gas Concentrations as mole fractions to define the required absorption duty.
- Enter the Liquid Flow Rate in m³/hr — the liquid-to-gas ratio controls absorption efficiency and solvent consumption.
- Enter Henry's Law Constant (m) for the gas-solvent system at operating temperature — larger values mean less soluble gas and require more transfer units.
- Enter the Packing Factor in 1/m from the packing vendor's datasheet (Raschig rings, structured packing, etc.).
- Review Column Diameter in meters and Packing Height in meters to size the vessel and estimate capital cost.
- Check the Number of Transfer Units (NTU) and Height of Transfer Unit (HTU) to verify sufficient mass transfer capacity.
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