Mass Balances for the Gas and Liquid Bulk Phases

Based on the hypotheses presented above, the mass balances can be written as follows. 

The liquid phase outside the packing network is described by 

Inside the packing network, only liquid is present, and the balance becomes 

The model consists of a set of parabolic PDEs 9.1 through 9.3. For the reactor iiflet and outlet, the classical boundary conditions of Danckwerts are applied. The boundary conditions for the inlet are (Chapter 4) 

The initial conditions valid at t = 0 are evident cl, c[p and Cgi are assigned known profiles throughout the column, that is, constant values inside the column. 

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