Example - Gas Phase PFR

# Example - Gas Phase PFR - CHE 4151 Jennings Example Gas...

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CHE 4151 Jennings Example - Gas Phase PFR [ Problem 4 - 8, pp.172-173 in Fogler, 2nd.Ed., parts (a) - (d) only. ] The gas-phase reaction, A + 2 B ── > 2 D, is to be carried out in an isothermal plug-flow reactor at 5.0 atm. The mole fractions of the feedstreams are: A = 0.20, B = 0.50, and inerts = 0.30. a) What is the steady-state volumetric flow rate at any point in the reactor if the pressure drop due to fluid friction can be ignored? b) What are the expressions for the concentrations of A, B, and D as a function of conversion at any point along the reactor? c) What is the feed concentration (units: mol/L) of A if the feed temperature is 55hC? d) How large must the plug-flow reactor be to achieve a conversion (based on A) of 0.70 if the temperature in the reactor is uniform (55hC), the volumetric feed rate is 50 L/min, and the rate law at 55hC is - r A = 2.5 C A 1 / 2 C B mol / L-min ANSWER: The reaction is non-equimolar and takes place in the gas phase. The volumetric flow rate out of the reactor (Q) will therefore be different from the flow rate into the

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## This note was uploaded on 04/29/2008 for the course CHE 4151 taught by Professor J during the Spring '08 term at FIT.

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Example - Gas Phase PFR - CHE 4151 Jennings Example Gas...

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