Question

Gas absorption or gas scrubbing is a ________?

1) Process used to remove pollutants from gas streams
2) Process used to add pollutants to gas streams
3) Process used to convert gas into liquid
4) Process used to convert liquid into gas

Answer 1

Gas absorption or gas scrubbing is used to remove pollutants like SO₂ and NOx from gas streams in various industries, including power plants and natural gas processing.

Step-by-step explanation:

Gas absorption or gas scrubbing is a process used to remove pollutants from gas streams. This process is particularly important in industries such as power plants where substances like SO₂ and NOx need to be removed to prevent issues like acid rain. For example, in coal-burning power plants, SO₂ can be effectively removed from exhaust gases using a wet scrubber system that reacts the gas with lime (CaO) and water to produce calcium sulfite dihydrate (CaSO₃.2H₂O). Similarly, tail gas treating methods like the Scot process and Clauspol process are used. The extraction and processing of natural gas involve removing impurities such as acid gas to ensure that the natural gas is safe for use and transportation.