Figure 2. Single-component profiles during uptake of C₂H₆–CO₂ mixtures.

(a) Evolution with time of the concentration profiles for ethane (the slow component), after the initially activated crystal of zeolite ZSM-58 has been brought into contact with a C₂H₆–CO₂ mixture with partial pressures of each component of 200 mbar in the surrounding atmosphere. With the ethane front penetrating the system, CO₂ is partially desorbed as shown in b. Finally both components reach uniform equilibrium concentrations determined by their partial pressures.