1 reply to this topic

[Gadl]

Hi!

 

I'm working in a hydrocracking of diesel simulation. I'm thinking to do a simple simulation considering the conversion rate of a pseudo component hydrocracking reaction.

I have already my pseudo component data based on TBP an SG. So, how to estimate the new pseudo-components that come of an existant pseudo-component HCK, the number of reactions and their conversion rate? Thank you very much.

Best regards,

Gadl

 

[SilverShaded]

Why are you hydrocracking diesel?  Wouldn't that just downgrade it to lower value Naphtha and gas?

The problem you have in making a realistic model is that each pseudocomponents cracking tendency depends on its aromatic content (ie density), you could consider multiple pseudocomponenets at each boiling point to independently represent Aromatics, Parrafins, Naphthenes etc.  Each with there own activation energy and rate of cracking.

So when you crack a parrafin you could estimate the ratio of C number products on some probability basis to divide the reaction products into C1..Cxx components, while maintaning C/H mole balance.

Hydrocracking is a difficult process to really model and all commercial models rely on calibration against actual process data to get anything like a realistic representation of any particular reactor.  Of course it can be fun to do a simple model, provided its not being used for anything seriously.

Edited by SilverShaded, 27 October 2022 - 07:19 AM.