1 mol/s of a species A is fed into a continuous gas phase reactor. The following two fast
equilibrium reactions take place in the reactor, which operates at 298 K and a pressure P:
The output of the reactor is assumed to be at equilibrium. The selectivity of the desired product
D with respect to the undesired product E (S D/E ) is 2:1.
Organize
(a) Draw a process flow diagram and label all stream and system variables.
(b) Write down three auxiliary equations in terms of the variables you wrote down in
your process flow diagram only.
(c) Count the DOF using the table on the right,
or using the definition (# unknowns – # independent equations).
If you use the definition, give an account for the unknowns and
equations by writing down their names (e.g., nA,2, MB of A)
(d) Write down all material balances, including the total material
balance.
(e) Solve to determine the fractional selectivity for the formation of
D from A
(f) Determine the reactor pressure P
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