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

Design Philosophy of Kerosene Hydrotreater

Design Philosophy of Kerosene Hydrotreater

Design Philosophy of Kerosene Hydrotreater

Dear All,
I want to understand the philosophy of kerosene hydrotreater, in my refinery kerosene hydrotreater is designed as per following,
Make up hydrogen supply is given from naphtha hydrotreater separator off which is bringing about 7000 ppm of H2S while sulphur in feed is 0.1 wt%.
This refinery is constructed in 1960 by Esso and designed by Exxon, the location of this refiner is in MENA. can anyone shed light on this type of hydrogen flow scheme, logic behind and philosophy.

RE: Design Philosophy of Kerosene Hydrotreater

The recirculating H2 from within this kero HDT unit may have a H2S concentration approaching this makeup from the naphtha HDT. Moreover makeup H2 is most likely only a small proportion of the recirculating H2 obtained from the kero HDT flash separator. In some cases, the main recirculating H2 stream taken from the kero HDT flash sep may be treated to remove H2S before mixing with this makeup - see PFS from HDT unit licensor for details.

RE: Design Philosophy of Kerosene Hydrotreater

there are thousands of refineries in MENA...and also several "critical" areas...
the well-designed refineries (as they are the exxon ones) have a hydrogen chain, where H2 streams rejected by more severe hydrotreatings are used as make-up in less severe HDTs. in this way the total H2 circulation in the refinery is reduced, at the same consumption (of course). in other words, the H2 goes to the washing process with a lower flowrate and a higher H2S concentration, reducing the size of the relevant facilities (CAPEX) and also their OPEX.
normally, the kero HDTs are once-thru processes (ie there is no internal recycle of H2...and so no H2 washing).
every refinery should have a dedicated PFD (process flow diagram) showing the entire hydrogen system with relevant equipment and process conditions (T, P, concentrations, flowrates) in the various operating schemes/campaign. process simulations, linear programming, pinch technology are very useful tools to analyze/improve the overall performances. field data and data from catalyst vendors must be utilized for the analyses.
good luck!

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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