What is KGA ?
KGA, as it is used in packing comparisons, is an overall mass transfer coefficient. KGA is usually presented in units of: Ib moles/(hr) (cu ft) (atm) Koch-Glitsch uses KGA in absorption studies to determine the relative merits of different packings. When comparing two packings, the one with the higher KGA is a more efficient packing. The relative differences obtained by absorption KGA’s do not, however, correspond to the differences found in the distillation mode. KGA is almost never employed to design distillation columns. HETP is almost always used for packed tower design purposes because it is easily related to the equilibrium state calculations employed by most designers.
