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Simulating A Pfr For Hda Process


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#1 Maankhalil

Maankhalil

    Brand New Member

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Posted 03 November 2017 - 10:28 AM

Hey Guys

 

I am a new student here. Thanks for this great forum.

 

For the past few days, I was trying to Simulate a PFR for the process of Hydrodealkylation of Toluene to produce Benzene.

 

C7H8  + H2 ---->    C6H6 + CH4

 

and the reversible undesired reaction:

 

2C6H6 <----> C12H10 + H2

 

The process occurs thermally without the involvement of a catalyst as the following kinetics:

 

 

Rate of First Rxn = P(Toluene) * P(Hydrogen)^0.5 * (3686000) * exp(-90800 / RT)

 

Rate of 2nd Rxn = P(benzene)^2 (90000) * exp(-90800)/RT) - P(Biphynel) * P(Hydrogen) * (255300) *  exp(-90800/RT)

 

Where P(Component) = The partial P of the component

 

The reaction occurs at a T 600 - 750 C.

 

The problem that I am facing is that I am not able to specify the conversion of toluene at 72% while maintaining the electivity of Benzene/ Biphenyl at 17.97%. Can you guys guide me on the way of setting these two reactions in a PFR and control the selectivity by controlling the flow rates of hydrogen and toluene to the reactor.

 

Best Regards

 

 

Note:

 

I am able to reach the conversion as 72%, but the selectivity is 11.15%.. The question is: is there any way to increase the selectivity to 17.97%  without affecting the conversion ?


Edited by Maankhalil, 03 November 2017 - 10:57 AM.





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