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

Flue Gas Compression - Need Impurities

Flue Gas Compression - Need Impurities

Flue Gas Compression - Need Impurities

Hello everyone,

I am a new engineer and I have a question I find quite challenging. I am working on a project in which we need to compress flue gas into cylinders from one of our plants to a research facility approximately 300 miles away. We are conducting research on the scrubbing potential of a certain mixture and would like to simulate the flue gas' original composition as closely as possible. The composition is approximately as follows:

H2O: 4.5%
O2: 15.5%
CO2: 3%
N2: 77%
Trace amounts of NOx, SOx, CO, assorted HC

The flue exits the stack at around 450 F. If we were to chill it to 100 F and then compress it to 1500 PSI, would all of the impurities and CO2 drop out? For this project, I am looking to keep as many of the impurities as possible. I imagine I would have to compress it to a lower pressure to keep them from dropping out.


RE: Flue Gas Compression - Need Impurities

Your issue I would imagine is that as you cool the gas and the water condenses, different amounts of the gases will dissolve into the water. So you need to keep every thing together so that in the remote facility then can heat it all up and get back to the original composition. If you have a good analyser you can then check to see that your samples capture all of the gases.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

RE: Flue Gas Compression - Need Impurities

Spoiler alert, I added just .01% methane for grins. This is the composition going into your cylinder after 4 stages of compression with intercooling and separation.

Why not just make your own sample of the stuff in the lab, why compress and ship it?

---- ---------------- --------- --------- --------- --------- --------- ---------
2 METHANE 0.009999 0.009999 .1594E-06 .3854E-07 0.010423 655.429
47 OXYGEN 15.4984 15.4983 0.000201 .4868E-04 16.1551 804.236
48 CARBON MONOXIDE 0. 0. 0. 0. 0. 7.96209
49 CARBON DIOXIDE 2.99913 2.99889 0.000999 0.000241 3.12622 31.3723
46 NITROGEN 76.9919 76.9918 0.000750 0.000181 80.2546 1072.31
62 WATER 0.435196 0.193916 0.998051 0.241280 0.453638 0.002030
---- ---------------- --------- --------- --------- --------- ---------
TOTAL 95.9346 95.6929 1.00000 0.241751 100.000

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