Waste Management

Choose the Correct Answer

Correct Answer : Option b

Explanation
Pyrolysis is a thermal decomposition process in which organic materials (such as biomass, plastic, or waste) break down when exposed to high temperatures (300–800°C) in the absence of oxygen. Since there is no oxygen, combustion does not occur, and instead, the material is converted into solid, liquid, and gaseous products.

Statement 1 is not correct: Pyrolysis is the thermal decomposition of organic materials at high temperatures without oxygen.

Statement 2 is correct: It produces useful byproducts such as biochar, bio-oil, and syngas.

Statement 3 is not correct: It is not a combustion process, as it occurs without oxygen and does not directly release CO2 like burning does.

Products of Pyrolysis
● Biochar (Solid): A carbon-rich residue used as a soil enhancer to store carbon and improve fertility.
● Bio-Oil (Liquid): A thick, dark liquid that can be refined into fuel.
● Syngas (Gaseous): A mixture of hydrogen, methane, and carbon monoxide, used for energy generation.
Applications of Pyrolysis
● Waste Management: It converts plastic waste, biomass, and tires into useful energy.
● Renewable Energy: It produces biofuels as an alternative to fossil fuels.
● Carbon Sequestration: Biochar helps trap carbon in the soil, reducing CO2 in the atmosphere.
● Reduction of Pollution: It reduces landfill waste and controls air pollution by preventing open burning