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Difference between revisions of "Pyrolysis"
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Pyrolysis (from greek ''pyr,'' "fire" and ''lysis,'' "loosing/unbind") is a [[conversion technology]] that utilises a [[thermochemical process]] to convert organic compounds in presence of heat and absence of oxygen into valuable products which can be solid, liquid or gaseous. The chemical transformations of substances are generally accompanied by the breaking of chemical bonds which leads to the conversion of more complex molecules into simpler molecules which may also combine with each other to build up larger molecules again. The products of pyrolysis are usually not the actual building blocks of the decomposed substance, but are structurally modified (e.g. by cyclization and aromatisation or rearrangement). | '''Pyrolysis''' (from greek ''pyr,'' "fire" and ''lysis,'' "loosing/unbind") is a [[conversion technology]] that utilises a [[thermochemical process]] to convert organic compounds in presence of heat and absence of oxygen into valuable products which can be solid, liquid or gaseous. The chemical transformations of substances are generally accompanied by the breaking of chemical bonds which leads to the conversion of more complex molecules into simpler molecules which may also combine with each other to build up larger molecules again. The products of pyrolysis are usually not the actual building blocks of the decomposed substance, but are structurally modified (e.g. by cyclization and aromatisation or rearrangement). | ||
== Feedstock == | == Feedstock == | ||
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* [[Physical pre-treatments]] | * [[Physical pre-treatments]] | ||
** [[Sizing]] (e.g. chipping, grinding) | **[[Sizing]] (e.g. chipping, grinding) | ||
** [[Densification]] (e.g. pressure-densification) | ** [[Densification]] (e.g. pressure-densification) | ||
** [[Steam explosion]] | |||
** [[Drying]] (e.g. air drying, freeze-drying) | |||
* [[Chemical pre-treatment]] | * [[Chemical pre-treatment]] | ||
** Acid and alkali pre-treatment (e.g for the removal of minerals) | ** Acid and alkali pre-treatment (e.g for the removal of minerals) | ||
** [[Wet torrefaction]] | |||
** [[ | **[[Ammonia fibre expansion]] | ||
** [[Ammonia fibre expansion]] | |||
** Biochemical pre-treatment | ** Biochemical pre-treatment | ||