Answer to Question #234274 in Chemical Engineering for Lucky

Question #234274

b) A homogenous liquid phase reaction with the given stoichiometry and kinetics A→S,-rA=kCA^2, takes place with 50% conversion in a mixed flow reactor. Find the conversion if this reactor is replaced by another mixed flow reactor having volume 6 times that of the original reactor-all else remain unchanged. Find the conversion if the original reactor is replaced by a plug flow of the same size- all else remains unchanged.


1
Expert's answer
2021-09-10T00:04:00-0400

According to the rate of the reaction, the reaction is of second order. The conversion in a mixed flow reactor is, ForFor a mixed flow reactor, the general reactor design equation is

where V is the volume of the reactor, is volumetric flow rate, is the initial concentration of A, and −r is the rate of the equation. In Plug flow reactor, where all the terms have similar notations to mixed flow reactor.




a) The volume of the new reactor is 6 times the volume of the original reactor, V'=6×V

Therefore,





The conversion can never be greater than 1. So, the conversion is 0.75.


b) In the case of PFR,



a) Conversion is 75%b) Conversion is 66.66%

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