Consider the following statements:
1. Pyrolysis and gasification are both thermal decomposition processes.
2. Gasification processes typically operate at higher temperatures than pyrolysis.
3. Unlike pyrolysis, gasification occurs in the absence of oxygen.

Which of the statements given above are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Question

Consider the following statements:
1. Pyrolysis and gasification are both thermal decomposition processes.
2. Gasification processes typically operate at higher temperatures than pyrolysis.
3. Unlike pyrolysis, gasification occurs in the absence of oxygen.

Which of the statements given above are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

ONLiNE UPSC · Accepted Answer

Statement 1 is correct while statement 3 is not correct: Pyrolysis & gasification are both thermal decomposition processes. Pyrolysis occurs in the full absence or near absence of oxygen, leading to the production of solid, liquid, and gaseous products, whereas gasification occurs in a partial absence of oxygen, primarily producing syngas. Both processes can convert organic materials into valuable products and can be used for energy production.

Statement 2 is correct: Gasification typically operates at higher temperatures (usually above 700&deg;C), whereas pyrolysis occurs at lower temperatures (300&ndash;700&deg;C).

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Thermal Decomposition Processes

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M Question 1	⏱ 0
Consider the following statements: 1. Pyrolysis and gasification are both thermal decomposition processes. 2. Gasification processes typically operate at higher temperatures than pyrolysis. 3. Unlike pyrolysis, gasification occurs in the absence of oxygen. Which of the statements given above are correct? (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3