Question:
Answer:
- It normally impedes smooth operation as it involves resistance to flow in the column.
- Flows in the experiment
The pump would maintain water circulation by facilitating water conveyance from the tank to the packing column via the top part such that water flow in the column is by gravity. Meanwhile, gas flow is facilitated by an air fan F2 sourced via an air compressor. This flow is regulated via a flow control valve C2 and pressurized air enters the column from the base. Since this air is pressurized, it easily diffuses against the pressure drop gradient in the column. The gas, after scrubbing, is released via the top outlet in the end column.
- Flood gas velocity varies with water flow
These two are dependent on the pressure drop across the packing material. As the flood gas velocity increases, so is the pressure drop. The flow of water under gravity causes the pressure drop to further increase. As a result of this, the gas velocity is to be maintained above which flow of water is not affected such that as the flow rate of water is increased, the gas velocity also increases to counter the pressure drop.
- Packing refers to a process of filling up the space column with suitable liquid as the gas to be scrubbed is forced into the column against a pressure drop. The material for packing should be such that it allows free flow of gas hence its shape should be straight and slightly wide to allow more gas to flow into the chamber per unit time. Constrictions and bends normally impede free flow.
- To scale up the column and increase flow rate, the diameter will have to be increased. Mathematically, flow rate is directly proportional to the cross-section area of the tube such that as the diameter is increased, so is the area and so is the flow rate at constant velocity.
- Yes it would as pressure drop in the column will be zero.
Y= CO2 concentration
X= Length of column
A= Gas phase
B=Liquid phase
- Scrubbing refers to the removal of solid particles from a gas and is directed onto a liquid surface using liquid discharge as the forcing mechanism. While in stripping, a chemically nonreactive gas is removed from a bubbling mixture. Normally scrubbing involves force mixing of solid particles with liquid particles from a gas phase.
