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In the context of pollution control technologies, consider the following statements with respect to Flue Gas
Desulfurization:
Desulfurization:
1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.
2. It is accomplished through either a wet or a dry process.
3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.
2. It is accomplished through either a wet or a dry process.
3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.
Q. Which of the statements given above is/arecorrect?
- a)2 only
- b)2 and 3 only
- c)1 and 3 only
- d)1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In the context of pollution control technologies, consider the followi...
Understanding Flue Gas Desulfurization (FGD)
Flue Gas Desulfurization (FGD) is a critical technology used to reduce sulfur dioxide (SO2) emissions from power plants and industrial processes. Let's evaluate the statements regarding this technology:
Statement 1: Ammonia as a Reducing Agent
- This statement is incorrect.
- FGD primarily utilizes lime or limestone as the reagent for the removal of SO2, not ammonia. Ammonia is used in some specific types of processes, like selective catalytic reduction (SCR) for nitrogen oxides (NOx), but not typically for SO2 in FGD.
Statement 2: Wet and Dry Processes
- This statement is correct.
- FGD systems can be classified into wet and dry processes. Wet FGD systems use a slurry of lime or limestone to absorb sulfur dioxide, while dry systems use dry sorbent injection methods.
Statement 3: Applications of FGD Products
- This statement is correct.
- The byproducts of FGD, primarily gypsum (calcium sulfate), can be utilized in cement manufacturing and are also used in agricultural applications as a soil conditioner.
Conclusion
Based on the evaluation:
- Statement 1 is incorrect.
- Statements 2 and 3 are correct.
Thus, the correct answer is option B: 2 and 3 only.
Flue Gas Desulfurization (FGD) is a critical technology used to reduce sulfur dioxide (SO2) emissions from power plants and industrial processes. Let's evaluate the statements regarding this technology:
Statement 1: Ammonia as a Reducing Agent
- This statement is incorrect.
- FGD primarily utilizes lime or limestone as the reagent for the removal of SO2, not ammonia. Ammonia is used in some specific types of processes, like selective catalytic reduction (SCR) for nitrogen oxides (NOx), but not typically for SO2 in FGD.
Statement 2: Wet and Dry Processes
- This statement is correct.
- FGD systems can be classified into wet and dry processes. Wet FGD systems use a slurry of lime or limestone to absorb sulfur dioxide, while dry systems use dry sorbent injection methods.
Statement 3: Applications of FGD Products
- This statement is correct.
- The byproducts of FGD, primarily gypsum (calcium sulfate), can be utilized in cement manufacturing and are also used in agricultural applications as a soil conditioner.
Conclusion
Based on the evaluation:
- Statement 1 is incorrect.
- Statements 2 and 3 are correct.
Thus, the correct answer is option B: 2 and 3 only.
Community Answer
In the context of pollution control technologies, consider the followi...
- Flue Gas Desulfurization (FGD)- Flue gas is the gas exiting the atmosphere via a flue, which is a pipe or channel for conveying exhaust gases from a fireplace, oven, furnace, boiler or steam generator. Quite often, flue gas refers to the combustion exhaust gas produced at power plants.
- It is a set of technologies used to remove SO2 from exhaust flue gases of fossil-fuel power plants. It does not use Ammonia as a reducing agent. Hence statement 1 is not correct.
- This is accomplished through either a wet or a dry process. Hence statement 2 is correct.
- Dry FGD: In the process of dry scrubbing injection systems, lime is used as a reagent to react and remove gaseous pollutants.
- A dry injection process injects dry hydrated lime directly into the flue gas duct.
- It yields a dry final product, collected in particulate control devices for further treatment.
- Wet FGD: A shower of lime slurry is sprayed into a flue gas scrubber, where the SO2 is absorbed into the spray and becomes a wet calcium sulfite and wastewater.
- FGD wastewater can be effectively and efficiently treated using large filter presses or large vacuum belt filters for very large sludge production. Cement manufacture, construction of structural fills, and agricultural applications each utilize significant volumes of FGD products. Hence statement 3 is correct.
- Ammonia is used as a reducing agent in Selective catalytic reduction (SCR)
- Other pollution control technologies -
- Selective non-catalytic reduction (SNCR)
- In the SNCR process a reagent, i.e., urea, ammonium hydroxide, anhydrous ammonia, or aqueous ammonia, is injected into flue gases in the furnace within the appropriate temperature zone.
- The NOx and the reagent (urea, etc.) react to form N2 and H2O and do not require a catalyst.
- Electrostatic precipitator - An electrostatic precipitator is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.
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In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?
Question Description
In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?.
In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?.
Solutions for In the context of pollution control technologies, consider the following statements with respect to Flue GasDesulfurization:1. This technology uses Ammonia as a reducing agent to convert oxides of sulphur to sulphur.2. It is accomplished through either a wet or a dry process.3. Flue Gas Desulfurization products are used in cement manufacturing and agricultural applications.Q. Which of the statements given above is/arecorrect?a)2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
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