Algorithm for Complex Reactions


 

Reactor Type

Gas Phase

Liquid Phase

Batch

Semibatch

 

CSTR

PFR

PBR

            

Rates

NOTE: The reaction rates in the above mole balances are net rates.

The new things for multiple reactions that build on Figure 4-11 and Table 4-6 are

  1. Number every reaction
  2. Rate Law for every reaction
  3. Relative Rates for every reaction
  4. Net Rates of Reaction
  1. Number every reaction
  2. Rate Laws for every reaction
  3. Relative Rates for each reaction

For a given reaction i



  1. Net Rate of Formation for Species A that appears in N reactions,

Stoichiometry

NOTE: We could use the gas phase mole balance for liquids and then just express the concentration as
Flow CA = FA/υ0
Batch CA = NA/V0

Writing Net Rates of Formation

 

Applications of Algorithm

(1)

NOTE: The specific reaction rate k1A is
defined with respect to species A.

(2)

NOTE: The specific reaction rate k2C is
defined with respect to species C.

These reactions will be used in the following 5 examples

• Liquid Phase PFR

• Liquid Phase CSTR

• Gas Phase PFR no ΔT

• Gas Phase Membrane Reactor with ΔT

• Liquid Phase Semibatch Reactor