Gas absorption, also known as scrubbing, is a process where a gas mixture is contacted with a liquid to preferentially dissolve one or more gas components into the liquid solution. There are two main types of absorption: physical absorption where the gas forms a physical solution with the liquid, and chemical absorption where the gas reacts with the liquid. A packed tower is commonly used for gas absorption, where the gas and liquid flow counter-currently through structured or random packing materials to facilitate mass transfer from the gas to the liquid phase. The efficiency of gas absorption is affected by factors such as gas solubility, volatility, corrosiveness, cost, viscosity, channeling, loading, entrainment, and flooding.

1. GAS ABSORPTION TOWER
Prepared By: Mohammad Mujeeb
Dept: Chemical Engineering QUEST
Nawabshah

2. GAS ABSORPTION (ALSO KNOWN AS SCRUBBING) IS AN
OPERATION IN WHICH A GAS MIXTURE IS CONTACTED
A LIQUID FOR THE PURPOSE OF PREFERENTIALLY
ONE OR MORE COMPONENTS OF THE GAS MIXTURE AND
PROVIDE A SOLUTION OF THEM IN THE LIQUID.
INTRODUCTION:

3. The fundamental physical principles
underlying the process of gas
absorption are the solubility of the absorbed
gas and the rate of mass
transfer. One or more of the constituents of
the gas mixture dissolves or
is absorbed in the liquid and can thus be
removed from the mixture. In
some systems, this gaseous constituent forms
a physical solution with the
liquid or the solvent, and in other cases , it
reacts with the liquid
chemically.

4. TYPES OF ABSORPTION
Physical
Chemical

5. PACKED TOWER

6. TYPES OF PACKING:
Regular
Random

7. FACTORS THAT AFFECTS THE EFFICIENCY
OF ABSORPTION:
Gas Solubility
volatility
Corrosiveness
cost
viscosity
Channeling
Loading
Entrainment
Flooding