Hydrocarbon Processing Copying and distributing are prohibited without permission of the publisher

How difficult is it to control absorber columns?

02.01.2012  |  Friedman, Y. Z. ,  Petrocontrol, New York, New York

Keywords:

The absorber-stripper configuration is common for gas plants. If we are to apply advanced process control (APC) systems on a gas plant, it better to address the control problem—maximizing recovery of propane or propylene (C3) while minimizing C2 at propane contamination limits. Absorber/strippers work like the rectifying and stripping sections of any distillation column, but the presence of lean-oil makes it more complex. The absorber preferentially absorbs and returns C3 to the stripper, whereas the stripper preferentially evaporates C2 in the absorber. However, it is impossible to absorb C3 without some C2, and likewise, it is impossible to boil C2 without evaporating some C3. That creates a large recycle of C2 and C3 between the two columns. Separation gets better with increased recycle as long as the columns do not flood.

To continue reading please, log in to hydrocarbonprocessing.com.

Subscribe now for premium access and unlimited access to the site, including archived articles and the process handbooks.  Start a free trial to gain access to articles from the current issue of Hydrocarbon Processing. 


Already have an account?

Subscribe

Subscribe today and gain unlimited and immediate access to the site. Plus, you'll receive the next 12 issues of the magazine in your choice of print or digital format. Start your subscription today.

Free trial

Start a free trial and gain immediate access to the current issue of the magazine plus additional, select content.

30 Day Trial




Related articles

FEATURED EVENT


Sign-up for the Free Daily HP Enewsletter!

Boxscore Database

A searchable database of project activity in the global hydrocarbon processing industry

Poll

Should the US allow exports of crude oil? (At present, US companies can export refined products derived from crude but not the raw crude itself.)


65%

35%




View previous results

Popular Searches

Please read our Term and Conditions and Privacy Policy before using the site. All material subject to strictly enforced copyright laws.
© 2014 Hydrocarbon Processing. © 2014 Gulf Publishing Company.