pyrolysis

/pai'rɔlisis/
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pyrolysis

A scientist observes the pyrolysis of wood chips in a laboratory furnace.

Definition
  1. Noun:
    • The chemical decomposition of a substance caused by heating it to a high temperature, typically in the absence of oxygen: "Pyrolysis" refers to a process where heat breaks down materials into smaller molecules without combustion.
Usage
  • "Pyrolysis" is a technical term used primarily in chemistry, engineering, and environmental science. It describes a specific thermochemical process.
  • It is typically used as an uncountable noun (e.g., "the pyrolysis of plastic").
  • The process results in the production of gases, liquids (like bio-oil), and a solid residue (char).
Examples
  • Noun:
    • The pyrolysis of wood produces charcoal and various volatile compounds.
    • Advanced pyrolysis techniques are being developed to convert waste plastic into fuel.
    • The study focused on the pyrolysis kinetics of different biomass materials.
Advanced Usage
  • "Catalytic pyrolysis": Pyrolysis that uses a catalyst to lower the required temperature or to influence the products formed.

    • Catalytic pyrolysis can improve the yield of desirable hydrocarbons from plastic waste.
  • "Fast pyrolysis": A type of pyrolysis characterized by very high heating rates and short residence times to maximize liquid product yield.

    • Fast pyrolysis is optimized for producing bio-oil from agricultural residues.
  • "Pyrolysis gas": The mixture of gases produced during pyrolysis.

    • The pyrolysis gas can be cleaned and used to generate power for the facility.
Variants and Related Words
  • Pyrolyze (verb, also spelled pyrolyse): To subject a material to pyrolysis.

    • The reactor is designed to pyrolyze tires efficiently.
  • Pyrolytic (adjective): Relating to or produced by pyrolysis.

    • The pyrolytic carbon coating is very durable.
  • Pyrolyser/Pyrolyzer (noun): A device or apparatus in which pyrolysis is carried out.

    • The new mobile pyrolyzer can process biomass on-site.
Synonyms
  • Thermal decomposition: A broader term for breakdown by heat, which can include pyrolysis.
  • Cracking: A similar process used in petroleum refining, though often with catalysts and specific to hydrocarbons.
  • Destructive distillation: An older term for pyrolysis, especially of organic materials like coal or wood.
Related Phrases/Compounds
  • Pyrolysis oil: The liquid product of pyrolysis, also called bio-oil.

    • Pyrolysis oil can be upgraded to transportation fuels.
  • Pyrolysis temperature: The specific temperature range at which pyrolysis occurs for a given material.

    • The optimal pyrolysis temperature for this polymer is 450°C.
  • Flash pyrolysis: A very rapid form of pyrolysis.

    • Flash pyrolysis is used to obtain high yields of condensable vapors.
pyrolysis

A scientist observes the pyrolysis of wood chips in a laboratory furnace.

Noun
  1. transformation of a substance produced by the action of heat

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