Answer to Question #234275 in Chemical Engineering for Lucky

Question #234275

A high molecular weight hydrocarbon stream A is continuously fed to a mixed flow reactor where it thermally cracks into lower molecular materials, collectively called R, as per stoichiometryd A→5R. It is a homogencus gas phase reaction Different extents of cracking obtained by varying the feed rate to the reactor are as follows:

FAo(milli mol/h) 300 1000 3000 5000

CA,OUT (milli mol/l). 16 30 5 60 The reactor volume is 0.1 liter and the feed concentration at the temperature of the reactor is Cac =100 milli mol/l. Find the rate equation which satisfactorily represents the cracking reaction. in the above problem if we ignore density changes, what is the rate equation represents the reaction.

Expert's answer

Given that

Feed concentration: CA0 = 100 millimol/liter

Volume of reactors V=0.1 liter

Then we obtain the rate of equation expression to be:

rA  =11.84C2A

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