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: McGraw-Hill Education
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Transcribed Image Text:The pyrolysis of methyl acetoxypropionate (A) produces acetic acid (B) and
methyl acrylate (C): A→ B+ C
(Note that MWA = 146 Ibm/lb-mol)
Below 550 °C, the reaction is first order in CA with a rate constant given by:
k = (7.8 x 10°)exp(-19220/T) with units of sec and with T in Kelvin
We want to design a plug flow tubular reactor having an inner cross-sectional
area of 0.0388 ft to operate isothermally at 500°C and convert 90% of the raw
feed of A. The feed enters at 5 atm and a flow rate of 500 Ibm/hour of A.
Assuming that ideal gas behavior applies and that we can neglect the pressure
drop across the reactor, what will be the length of the reactor? Hints: Notice the
change in number of moles with the reaction. Note that at 0°C and 1 atm, the
standard molar volume is 359 ft /lb-mole. One of the integrals can be solved using
the U-substitution method as provided in class.
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