Flue Gas Desulfurization Methods

Environmental Engineering

Overview of different methods for desulfurization of flue gases, including dry, semi-dry, and wet methods, focusing on the sorbents used and the chemical reactions involved.

Air Pollution Control Chemical Engineering Environmental Science

9 Questions Medium Ages 16+ Nov 5, 2025

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About this Study Set

This study set covers Environmental Engineering through 9 practice questions. Overview of different methods for desulfurization of flue gases, including dry, semi-dry, and wet methods, focusing on the sorbents used and the chemical reactions involved. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 9 questions from the Flue Gas Desulfurization Methods study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What type of sorbent is typically used in wet flue gas desulfurization methods?

A Aqueous suspension sorbent
B Activated carbon
C Silica gel
D Zeolite

2 In dry desulfurization methods, what phenomenon is used to remove gaseous pollutants?

A Adsorption
B Absorption
C Combustion
D Filtration

3 Which dry desulfurization method involves the injection of sorbent into the flue gas stream?

A LiFAC
B SDA
C Wet scrubbing
D Electrostatic precipitation

4 What is a key component used in the semi-dry SDA method for flue gas desulfurization?

A Spray dryer
B Electrostatic precipitator
C Activated carbon filter
D Catalytic converter

5 What is the primary product formed in the wet lime method of flue gas desulfurization?

A Gypsum (CaSO4)
B Calcium sulfite (CaSO3)
C Magnesium oxide (MgO)
D Sodium sulfate (Na2SO4)

6 What is the typical range of SO2 removal efficiency achieved by wet flue gas desulfurization methods?

A 90-95%
B 50-60%
C 70-80%
D 30-40%

7 In wet desulfurization, what material is used to treat the flue gases?

A Lime slurry
B Activated carbon
C Silica gel
D Zeolite

8 What is the purpose of the oxidation process in wet flue gas desulfurization?

A Convert CaSO3 to CaSO4
B Remove particulate matter
C Reduce NOx emissions
D Increase gas temperature

9 In the wet method using magnesium oxide (MgO), what is the final product after desulfurization?

A Magnesium sulfate (MgSO4)
B Magnesium sulfite (MgSO3)
C Calcium sulfate (CaSO4)
D Calcium sulfite (CaSO3)

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