تم الحل ✓
categoryهندسة كيميائية
schoolبكالوريوس
event_available2026-07-13
السؤال
Transcribed Image Text:
Problem 1: Maximizing the selectivity of the famous Tranbouze Reactions
Reactant A decomposes by three simultaneous reactions to from three products, one that is desired, D,
and two that are undesired X and Y. These gas-phase reactions, along with the approapriate rate laws,
are called the Trambouze Reactions (AIChE Journal, 5, 384).
1)
A - X
A
3)
A - Y
2)
-1A =x=k₁ = 0.0001
mol
1-s
-12A=Dk2[A] = (0.0015 s¹) [A]
-13A = ry=k3 [A]² = (0.008) [A]²
The specific reaction rates are given at 300 K and the activation energies for reactions (1), (2), and (3)
are E₁ = 10,000 kcal/mole, E₂ = 15,000 kcal/mole, and E3 = 20,000 kcal/mole.
a) How, and under what conditions (e.g., reactor type(s), temperature, concentrations), should the
reaction be carried out to maximize the selectivity of species B for an entering concentration of
species A of 0.4 M and volumetric flow rate of 2.0 1/s?
b) How could the conversion of A be increased and keep selectivity relatively high?
Problem 2: Series reactions in a CSTR
The elementary liquid-phase series reaction shown below is carried out in a CSTR.
ABC
a) Determine the exit concentrations of A, B, and C from the CSTR.
b) Find the value of the residence time t that will maximize the concentration of B.
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