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Catalyst EOR

thread798-471379

Catalyst EOR

Catalyst EOR

(OP)
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.

N
Replies continue below

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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.

luis

RE: Catalyst EOR

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

RE: Catalyst EOR

(OP)
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?

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