Jump to content

Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog


Components In Pfr Reformer Is Not Reacting In Hysys

hysys aspen steam mixed reformed dry converging pfr

1 reply to this topic
Share this topic:
| More

#1 Bluethehumble


    Brand New Member

  • Members
  • 3 posts

Posted 18 July 2017 - 03:46 PM


I am trying simulate the mixed reactor process (Dry methane reforming + Reverse water gas+ steam reforming) using the PFR model in hysys in order to obtain syngas (H2 & CO) compositions by passing CH4,H2O and CO2 through the mixed reactor. I added 4 heterogeneous catalytic reaction on to the PFR where:

1) Dry reforming of methane: CH4 + CO2 <> 2CO + 2H2
2) Steam reforming of methane: CH4 + H2O <> CO + 3H2
3) Steam reforming of methane : CH4 + 2H2O <> CO2 + 4H2
4) Water gas shift : CO + H2O <> CO2 + H2

I also added the kinetic reaction values for A and Ea for each of the reactions
1) A = 2.91 x 10^-7, Ea= -234,851
2) A = 4.72x10^6, Ea= -232,477
3) A = 1.89x10^3, Ea= -267,760
4) A = 1.06x10^-3, Ea= -71,537

Even added the diameter and length values.
Reformer condition:
Feed composition:
CH4: 0.25
H2O: 0.37
CO2: 0.38
Temp: 900C and Pressure: 1.2 Mpa

But when I run it, the feed entering the PFR reformer just flows out of the reformer without reacting. I have struggling to try to obtain the H2 and CO compositions but no luck. 
Much help will be appreciated.Thank you.

Edited by Bluethehumble, 18 July 2017 - 03:48 PM.

#2 Waqar1989


    Junior Member

  • Members
  • 13 posts

Posted 25 July 2017 - 11:55 AM

Have you attached energy stream and specified heat of reaction for the endothermic reactions?

You may also use Aspen Plus instead of HYSYS (if thats an option) to employ an old .dll file from Aspen that has already builtin kinetics of all ammonia plant reactions including reformer.

Similar Topics