Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

h2 unit prereformer catalyst regeneration

h2 unit prereformer catalyst regeneration

h2 unit prereformer catalyst regeneration

i am working in topsoe hydrogen plant .
the prereormer reactor is currently operating at 93% Z-90 value,and we are going to replace the catalyst soon.
has anyone any idea about regenration of prereformer catalyst?
has anyone carried out it?
any information is welcome.

RE: h2 unit prereformer catalyst regeneration

Hi Santosh:

As far as I know, you can not regenerate Pre-Reformer catalyst.
You may contact catalyst vendors about the regeneration. as this catalyst is an expensive one, it will nice to regen. Just out of curiosity, what is the catalyst life you are getting, and what is the SV you are using? Is your HDS working properly?



RE: h2 unit prereformer catalyst regeneration

we have been using  prereformer for last 4 years,it is the longest running (since first start up)topsoe prereformer catalyst (iocl-india-panipat).
as regards hds we have not faced any problems with it.actually the sulphur level in the feed itself which is light naphtha from hydrocracker is very low.

RE: h2 unit prereformer catalyst regeneration

I think 4 years is a good life as such. Ofcourse, depending on you GHSV ( are you in the range of 15000 Hr^-1?)
Well, one of the benefits of pre-reformer is to reduce S/C ratio (at least I would like to claim that way), besides utilizing lost energy in the convection section. I fail to understand the explanation of higher S/C. Are you running less than 2.12 S/C?

It might be that you just need to change the catalyst.


Jay Bando

RE: h2 unit prereformer catalyst regeneration

yes, we are in that range of ghsv .the s/c ratio we operate at is 2.5-2.6.it is as per the topsoe guidelines .
how low can we operate for a feed naphtha c5-90 cut?
we have opeated the plant at 2.3 s/c for quite some time when we facing high dp problem in reformer.
could that be a problem?
but why can't we regenrate the prereformer catalyst?
we do not expect any metals in naphtha we will permanantly blck the catalyst and all the upstream treating ensures that the deactivation can be either by carbon deposition or by sintering.if sintering is the case then not much can be doen about it but for the carbon case it can be burnt off the way we do it for reformer catalyst.

RE: h2 unit prereformer catalyst regeneration

has anyone tried to operate the h2 plant with low final boiling point of feed naphtha to elongate the run length of rpereformer when it is becoming limiting?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
Research Report - Simulation-Driven Design for SOLIDWORKS Users
In this engineering.com research report, we discuss the rising role of simulation and the paradigm shift commonly called the democratization of simulation. In particular, we focus on how SOLIDWORKS users can take advantage of simulation-driven design through two analysis tools: SOLIDWORKS Simulation and 3DEXPERIENCE WORKS. Download Now
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
eBook - The Design Gridlock Manifesto
In this eBook, you’ll learn 6 ways old CAD technology slows your company down and hear how design teams have put those problems to rest. “The Design Gridlock Manifesto” shares first-hand modern CAD experiences from 15 companies around the world. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close