WorksheetsQuiz on Pyrolysis and Plastic Recycling
Total questions: 15
Worksheet time: 8mins
Pyrolysis is best defined as
Combustion of plastics in the presence of oxygen
Thermal degradation of plastics in the absence of oxygen
Mechanical recycling of plastics
Biological decomposition of plastics
Which of the following is a major advantage of pyrolysis over mechanical recycling?
Requires pure plastic feedstock
Produces only liquid fuel
Can handle mixed and contaminated plastics
Operates at room temperature
Which pyrolysis product increases significantly at higher operating temperatures (>600 °C)?
Char
Wax
Oil
Gas
Slow pyrolysis is mainly preferred when the objective is to maximize
Liquid oil
Gas production
Char yield
Hydrogen generation
Which plastic releases acidic gases during pyrolysis, causing corrosion problems?
Polyethylene (PE)
Polypropylene (PP)
Polystyrene (PS)
Polyvinyl chloride (PVC)
The primary function of CaO when used in plastic pyrolysis is to
Increase oil viscosity
Capture acidic gases such as HCl
Enhance char formation
Reduce reactor temperature
Pyrolysis gas is commonly used for
Fertilizer production
Plastic molding
Heat and power generation
Wastewater treatment
Which reactor type provides uniform heating and is suitable for continuous operation?
Fixed bed reactor
Batch reactor
Fluidized bed reactor
Open combustion chamber
An important application of pyrolysis char is
Food packaging
CO₂ capture and adsorption
Drinking water purification without treatment
Polymer synthesis
In the Indian context, pyrolysis is mainly promoted because
India lacks plastic waste
Mixed plastic waste dominates municipal waste streams
Mechanical recycling is highly efficient
Pyrolysis produces zero emissions
Which government initiative supports plastic waste-to-energy solutions in India?
Make in India
Digital India
Swachh Bharat Mission
Skill India
Compared to incineration, pyrolysis offers
Higher air pollution
No energy recovery
Lower emissions and resource recovery
Complete destruction of plastics without by-products
Which combination best supports a sustainable pyrolysis system?
High temperature + no gas cleaning
Mixed plastics + open burning
Catalyst use + gas and char valorization
Low temperature + landfilling of char
Microwave-assisted pyrolysis is considered advanced because it
Uses biological energy
Requires no electricity
Provides rapid and selective heating
Produces only char
The shift in recent research focus is from
Char to oil
Oil to gas and char
Gas to landfilling
Recycling to incineration
