×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Biogas scrubber design - Removal of CO2 and H2S and their treatment

Biogas scrubber design - Removal of CO2 and H2S and their treatment

Biogas scrubber design - Removal of CO2 and H2S and their treatment

(OP)
Hi a am currently supposed to be designing a Gas Scrubber.
The idea is to reclaim Gas from waste water produced by a paper recycling plant (for use in the on site gas turbine CHP) whilst at the same time cleaning the water on site to avoid expensive mogden charges etc.
The Biogas is produced from an anerobic digester and a UASB. The biogas produced has been deemed too high in CO2 (~40% CO2) and so must be scrubbed.
In addition there will be H2S and im pretty sure ammonia present. The initial design consisted of a water scrubber for CO2 removal and an air stripper to clean the H2O. I must then deal with the contaminants present in the air which I believe to be H2S, CO2 and Ammonia.

The biogas stream to be scrubbed flows at a rate of ~50kg/hr according to information given to me.

I dont really know where to start and any information would be greatly appreciated. In additon I am certain the air used to strip the CO2 and H2S from the water cannot be simply allowed into the atmosphere untreated and so any information on methods of treatment (if neccessary) would also be appreciated.

 

RE: Biogas scrubber design - Removal of CO2 and H2S and their treatment

so how it would be if you goes for small amine treatment unit for stripping those acid gas

RE: Biogas scrubber design - Removal of CO2 and H2S and their treatment

by the time you circulate enough water to lower the CO2, most of your methane will end up in the water as will the H2S.

You can use caustic solution to remove the H2S and CO2 or use iron spong or one of its clones like sulfa treat to remove the H2S as a disposible soild.  Then use an amine solution to remove the CO2.

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!


Resources