Forums
Blogs
Articles
File Library
FAQ
Search
FB
Hi,
I really need some help. I'm designing a packed distillation column for a project and I have calculated the values HG( height of gas phase transfer unit) and HL (height of liquid phase transfer unit). I have an equation correlating them to HOG (HEIGHT OF OVERALL GAS PHASE TRANSFER UNIT) and hence to the HETP.
HOG=HG +(mGm/Lm)HL
HETP= (HOG Ln(mGm/Lm)) / (mGm/(Lm-1))
I'm not sure how to go about calculating the slope of the operating line -m which is required in both equations.The mixture being separated is a multi component one and I'm not sure if I can just plot x against y, (like in mcabe-thiele) can I????
Please, please help.I haven't studied the design of packed columns in my university course and I'm really confused!!!!!
Pratichi
|
|
Packed Distaillation Column
Started by Guest_pratichi_*, Feb 19 2006 09:17 AM
1 reply to this topic
Share this topic:
#2
siretb
-
- ChE Plus Subscriber
-
- 304 posts
ChE Jedi
Posted 21 February 2006 - 05:25 AM
The Myx is the slope of the equilibrium line. For a multicomponent system you can extend by calculating myx as d (vapor molefrac of component considered)/d (liquid molefrac of component considered), where d is the derivative , fixing the other components at their initial concentration (when calculating the derivative, only the two keys (light and heavy) are varying.
From a practical view point, for a multicomponent system, I would use the HEPT approach, just reading the expected HETP from the vendor's curve. This should be sufficient for a first shot.
From a practical view point, for a multicomponent system, I would use the HEPT approach, just reading the expected HETP from the vendor's curve. This should be sufficient for a first shot.
Similar Topics
Refinery Lpg Deethanizer Column DesignStarted by Guest_Ilyes_* , 15 Feb 2025 |
|
|
||
Multi-Tubular Packed Bed ReactorStarted by Guest_shambola_* , 12 Feb 2025 |
|
|
||
Methanol Water Distillation ColumnStarted by Guest_Kakashi-01_* , 27 Jan 2025 |
|
|
||
Aspen V11 Help On Radfrac Distillation Column ErrorStarted by Guest_savinedanglokta_* , 13 Nov 2024 |
|
|
||
Pressure Drop Due To Entry Loss At Liquid And Gases Inside The ColumnStarted by Guest_SANDEEPCH_* , 24 Oct 2024 |
|
|
