Question

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.

Answer 1

Given that

Feed concentration: C_A0 = 100 millimol/liter

Volume of reactors V=0.1 liter

Then we obtain the rate of equation expression to be:

r_A  =11.84C²A