'Liquid Hold-up' in a distillation column refers to down-coming liquid (liquid traffic travelling down the column) becoming trapped in the column's packing material.
Packing material is used in distillation columns to increase the contact efficiency between the down-coming liquid stream(s) and the up-flowing vapour stream(s). The packing materials do this by increasing the surface-to-volume ratio over which the vapour and liquid streams come into contact in order to promote separation between the more volatile and less volatile components in the column.
The down-coming liquid can become trapped in the packing material for a number of reasons. One example is when liquid becomes trapped in crack formations or fractures of the packing material (which can occur during normal or non-steady state column operation). When the liquid becomes trapped in these cracks/crevices, contact with the up-flowing vapour stream becomes non-existent and the liquid is literally 'held up' from travelling down the column.
Edward Yen-Chung Kung has written: 'Dispersed phase holdup in a rotating disc liquid-liquid extraction column'
Sometimes: The amount of liquid phase required to fill the column with a liquid-vapor equilibrium. Other Times: The liquid that sticks to the column and makes it look "wet"
In liquid chromatography, the separation phase is a liquid and can either be done using column or plane chromatography. Column chromatography refers to the chromatographic bed shape and can be done with either a solid or liquid phase.
When liquid holdup occurs, the repeated boiling and condensation on which the separation depends is interrupted and distillation becomes less efficient.
Thomas Holdup Stevens was born in 1795.
Thomas Holdup Stevens died in 1841.
The pressure of a liquid column of height h ("h meter liquid column) is: P = ρ*g*h [Bar], where ρ is the density of the liquid g is the gravitational acceleration (on Earth, in average 9.80665 m/s2)
The duration of The Trail of the Holdup Man is 1200.0 seconds.
The fractionation column is used to separate components of a liquid by distillation.
can you answer for me this question
The Great Filling Station Holdup was created in 1973.
I think you mean the meniscus
The Holdup - 1915 was released on: USA: 17 December 1915
It is simply that you need to be in equilibrum in pressure in the column. Flooding is when you have to much liquid coming down and at it's extreme the column will be filled with liquid. It is the same problem with weaping but in a way the opposite. There is not enough liquid in the column. A column is easier to operate, answers faster and do not overbalance as easily the closer you are to equilibra.
Holdup - 2011 II was released on: USA: June 2011
Metre Liquid Column
The denser it is, the lower in the column it will settle.
An Amateur Holdup - 1909 was released on: USA: 15 December 1909
The Holdup Man - 1920 was released on: USA: 8 August 1920
A Railroad Holdup - 1915 was released on: USA: 7 April 1915
A Lucky Holdup - 1912 was released on: USA: 11 April 1912
Kitty's Holdup - 1912 was released on: USA: 15 June 1912
The curved upper surface of a column of liquid is called a "meniscus".
Liquid products are sent to a fractionating column because they can't fit into any other columns because their fat innit.