pyrolysis: meaning, definition, pronunciation and examples
LowTechnical / Scientific
Quick answer
What does “pyrolysis” mean?
The chemical decomposition of a substance through the application of intense heat, typically in the absence of oxygen.
Audio
Pronunciation
Definition
Meaning and Definition
The chemical decomposition of a substance through the application of intense heat, typically in the absence of oxygen.
A thermochemical process used to convert organic materials into fuels, chemicals, or char by heating them to high temperatures in an inert atmosphere.
Dialectal Variation
British vs American Usage
Differences
No significant differences in spelling or core meaning. Both varieties use the term identically.
Connotations
Technical term with identical neutral, scientific connotations in both dialects.
Frequency
Equally rare in general discourse but standard in scientific contexts in both the UK and US.
Grammar
How to Use “pyrolysis” in a Sentence
The pyrolysis of [material] produces [product].[Material] undergoes pyrolysis at [temperature].They used pyrolysis to convert [material].Vocabulary
Collocations
Examples
Examples of “pyrolysis” in a Sentence
verb
British English
- The waste material was pyrolysed in the reactor to produce bio-oil.
- They plan to pyrolyse the plastic feedstock.
American English
- The waste material was pyrolyzed in the reactor to produce bio-oil.
- They plan to pyrolyze the plastic feedstock.
adverb
British English
- [Extremely rare; not standard]
- [No common usage]
American English
- [Extremely rare; not standard]
- [No common usage]
adjective
British English
- The pyrolytic conversion of biomass is efficient.
- They studied the pyrolytic behaviour of the polymer.
American English
- The pyrolytic conversion of biomass is efficient.
- They studied the pyrolytic behavior of the polymer.
Usage
Meaning in Context
Business
Used in industries like waste management, renewable energy, and chemicals regarding conversion technologies.
Academic
Common in chemistry, chemical engineering, environmental science, and materials science papers.
Everyday
Virtually never used in casual conversation.
Technical
The primary domain; used precisely to describe a specific thermochemical conversion process.
Vocabulary
Synonyms of “pyrolysis”
Vocabulary
Antonyms of “pyrolysis”
Watch out
Common Mistakes When Using “pyrolysis”
- Using 'pyrolysis' to mean simple burning or incineration (which involves oxygen).
- Mispronouncing it as 'peer-oh-lysis' (/ˈpaɪrəʊlɪsɪs/) instead of 'py-rol-ysis' (/paɪˈrɒlɪsɪs/).
FAQ
Frequently Asked Questions
No. Burning and incineration involve combustion with oxygen. Pyrolysis is decomposition by heat in the absence (or near absence) of oxygen.
Pyrolysis typically produces three outputs: a solid char (biochar), a liquid bio-oil or tar, and a synthetic gas (syngas).
It is used in the chemical industry, for converting biomass or waste plastics into fuels, in charcoal production, and in the treatment of hazardous materials.
'Pyrolyse' is the standard British English spelling, while 'pyrolyze' is the standard American English spelling. Both are verbs derived from 'pyrolysis'.
The chemical decomposition of a substance through the application of intense heat, typically in the absence of oxygen.
Pyrolysis is usually technical / scientific in register.
Pyrolysis: in British English it is pronounced /paɪˈrɒlɪsɪs/, and in American English it is pronounced /paɪˈrɑːləsɪs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Learning
Memory Aids
Mnemonic
Think 'PYRO' (fire, like in pyromaniac) + 'LYSIS' (breaking apart, like in analysis). It's the 'breaking apart by fire'.
Conceptual Metaphor
DECOMPOSITION IS UNRAVELING BY HEAT.
Practice
Quiz
What is the defining condition of pyrolysis?