  We propose a mathematical model for describing column adsorption processes
where large amounts of contaminant are removed from a carrier gas. The large
mass loss causes velocity and pressure to be variables which must then be
determined along with the contaminant and gas concentrations and adsorbed
quantity. The adsorption rate is described using a Langmuir sink, which is
physically more sensible than the linear sink used in a previous study. The
proposed model is solved numerically and using a traveling wave approach. The
analytical solutions are consistent with previous models with fixed gas
velocity and provide excellent agreement when validated against experimental
data.
