11. Parallel reactions in CSTR A 1/2 C. (2-51 The following reactions take place in a CSTR: A → 3/2 B; The first one follows the rate law r₁ = k₁[A]¹/2 (i.e. it is not 1st order!); the second one is simpl a) Analyse the dependence of the composition of the reactor on its space-time T. b) B is the desired product. What space-time corresponds to desirable conversion of 90% What is the undesirable conversion under these conditions? c) Plot the dependence of the composition on the space-time of the reactor. Use uni minutes for the space-time axis. d) The undesired product C has a maximum as a function of T. Find its position an magnitude, and mark it on the plot. Parameters: k₁= 8.1×10-4 M¹/2s-¹; k2 = 6.6×10-4 s¹; [A]o = 0.45 M. 2

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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11. Parallel reactions in CSTR
The following reactions take place in a CSTR:
A¹ 3/2 B;
→
A- 2 1/2 C.
(2-51)
The first one follows the rate law r₁ = k₁[A]¹/² (i.e. it is not 1st order!); the second one is simple.
a) Analyse the dependence of the composition of the reactor on its space-time t.
b) B is the desired product. What space-time corresponds to desirable conversion of 90%?
What is the undesirable conversion under these conditions?
c) Plot the dependence of the composition on the space-time of the reactor. Use units
minutes for the space-time axis.
d) The undesired product C has a maximum as a function of t. Find its position and
magnitude, and mark it on the plot.
Parameters: k₁ = 8.1×10-4 M¹/²s¹; k2 = 6.6×104 s¯¹; [A]o = 0.45 M.
Transcribed Image Text:11. Parallel reactions in CSTR The following reactions take place in a CSTR: A¹ 3/2 B; → A- 2 1/2 C. (2-51) The first one follows the rate law r₁ = k₁[A]¹/² (i.e. it is not 1st order!); the second one is simple. a) Analyse the dependence of the composition of the reactor on its space-time t. b) B is the desired product. What space-time corresponds to desirable conversion of 90%? What is the undesirable conversion under these conditions? c) Plot the dependence of the composition on the space-time of the reactor. Use units minutes for the space-time axis. d) The undesired product C has a maximum as a function of t. Find its position and magnitude, and mark it on the plot. Parameters: k₁ = 8.1×10-4 M¹/²s¹; k2 = 6.6×104 s¯¹; [A]o = 0.45 M.
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