×
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

concentration in gas mixture

concentration in gas mixture

concentration in gas mixture

(OP)

A centrifufal pump pumps a mixture of acetone and water to an atmospheric tank at 75gpm. Vent gases from this tank are send to an absorber using a blower. under working conditions, I measured solvent ppm and velocity at the blower inlet and calculated scrubbing liquid flow rate required( just for exercise) Now to decrease transfer time, we are planning to pump at 135 gpm to this tank.
how can I calculate flow rate of solvent in the vent gas(to blower) under these conditions??
Appreciate your help for a beginner.

Koshy

RE: concentration in gas mixture

75 gpm is just over 10 cubic feet per minute. This is the atmosphere displaced in the tank by the inflow, assuming no concurrent outglow.  Proportionally, 135 gpm is just over 18 cfm.  Multiply 18cfm by the concentration of acetone in the tank atmosphere you calculated, and you will know the rate of solvent  to the blower.  

RE: concentration in gas mixture

(OP)
Casey,

There is outflow too at 90 gpm and the rest overflows to a sump.

At any flow rate, acetone conc in the liquid willl be maintained at 1200ppm(wt). Based on this I can get flow rate of acetone and water in the mixture
If I use boyle's law, PV = constant and using partial pressure of acetone, I can get volume of acetone in the vent gas. I am kinda confused if this calculations are right.

Thank you

Koshy

RE: concentration in gas mixture

(OP)
I am sorry. Acetone concentration in the liquid wont be same. it will increased to 1600ppm at higher rates. Please guide me.

what are the guidelines to determine packed column total height? any references?

Thank You
Koshy

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