Contact US

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!

*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

Catalyst EOR

Catalyst EOR

Catalyst EOR

Dear Engineers.
I need some suggestions on a Gas Oil Hydrotreater I am currently working at as process engineer. The reactors have a Ni-Mo type catalyst (fixed bed) that have prematurely come to the EOR (end of run). We have a 3-4 months to go before out shutdown and I need to ensure we product within specs, without reducing feed.
We have tried the following steps already:
- Maximised feed temp
- Minimised feed Sulfur levels

Does anyone have any other suggestions?? I also heard of possibility of introducing liquid-moly catalyst in tour feed but not sure if anyone know about this.

Thanks in advance for all the help.


RE: Catalyst EOR

Bite the bullet and go for the shutdown to replace the catalyst - how many days will this take? But you've got to fix the problem of premature de activation of the Ni-Mo catalyst - what is the cause here, and can you fix this within the same shutdown window ?

RE: Catalyst EOR

If your catalyst is already poisoned! no way, you have to shut down.Three months for the next shut down is too much time, in my point of view.


RE: Catalyst EOR

Presume you have tried out maxing out on recycle H2 flow if you have a standby compressor.

RE: Catalyst EOR

Thanks for the response and the suggestions. We have lowered feedrate and have decided to shutdown sooner.

RE: Catalyst EOR

So do you know what caused the upstream guard reactors to underperform, resulting in the premature deactivation of this main reactor catalyst? And what will you do about this?

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


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