Gas-phase balance equations

The introduction of parameters Da, yN0 and kN0 in the gas-phase balance equations might seem unnecessarily complicated. However, it allows inclusion of the column volume Vin only one dimensionless parameter (Da), and leads to simple form for the bulk-liquid model. 

The model for the schematic system (Fig. 3) consists of the simple ODEs (3) (or (6)), (7), (8) and (9), which form an initial value problem (IVP). In the case that pure hydrogen is used, its pressure is kept constant and the liquid-phase components are nonvolatile, the gas-phase balance equations (8)-(9) are discarded and the gas-phase concentration in eqs (3) and (6) is obtained e.g. from the ideal gas law. The initial conditions, i.e. the concentrations at t=0 are equal everywhere in the system and the IVP can be solved numerically by any stiff ODE-solver. 

Eqns. (84) to (89) present the dimensionless steady state isothermal balance equations of model <23> [33]. In model <22>, dispersion in gas phase is considered. The governing gas phase balance equation is derived as usual [6, 33] and leads to... 

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See also in sourсe #XX -- [ ]

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