Editing Pyrolysis (section)

== PAHs generation ==
[[Polycyclic aromatic hydrocarbons]] (PAHs) can be generated from the pyrolysis of different solid waste fractions,<ref name="Zhou-2014" /> such as [[hemicellulose]], [[cellulose]], [[lignin]], [[pectin]], [[starch]], [[polyethylene]] (PE), [[polystyrene]] (PS), [[polyvinyl chloride]] (PVC), and [[polyethylene terephthalate]] (PET). PS, PVC, and lignin generate significant amount of PAHs. [[Naphthalene]] is the most abundant PAH among all the polycyclic aromatic hydrocarbons.<ref>{{cite journal |last1=Zhou |first1=Hui |last2=Wu |first2=Chunfei |last3=Onwudili |first3=Jude A. |last4=Meng |first4=Aihong |last5=Zhang |first5=Yanguo |last6=Williams |first6=Paul T. |title=Polycyclic aromatic hydrocarbons (PAH) formation from the pyrolysis of different municipal solid waste fractions |journal=Waste Management |date=February 2015 |volume=36 |pages=136–146 |doi=10.1016/j.wasman.2014.09.014 |pmid=25312776 |bibcode=2015WaMan..36..136Z |url=https://eprints.whiterose.ac.uk/85223/3/AS%20RE-RE-SUBMITTED%20-%20September%202014.pdf }}</ref>

When the temperature is increased from 500 to 900&nbsp;°C, most PAHs increase. With increasing temperature, the percentage of light PAHs decreases and the percentage of heavy PAHs increases.<ref>{{cite journal |last1=Zhou |first1=Hui |last2=Wu |first2=Chunfei |last3=Onwudili |first3=Jude A. |last4=Meng |first4=Aihong |last5=Zhang |first5=Yanguo |last6=Williams |first6=Paul T. |title=Polycyclic Aromatic Hydrocarbon Formation from the Pyrolysis/Gasification of Lignin at Different Reaction Conditions |journal=Energy & Fuels |date=16 October 2014 |volume=28 |issue=10 |pages=6371–6379 |doi=10.1021/ef5013769 }}</ref><ref>{{cite journal |last1=Zhou |first1=Hui |last2=Wu |first2=Chunfei |last3=Onwudili |first3=Jude A. |last4=Meng |first4=Aihong |last5=Zhang |first5=Yanguo |last6=Williams |first6=Paul T. |title=Influence of process conditions on the formation of 2–4 ring polycyclic aromatic hydrocarbons from the pyrolysis of polyvinyl chloride |journal=Fuel Processing Technology |date=April 2016 |volume=144 |pages=299–304 |doi=10.1016/j.fuproc.2016.01.013 |bibcode=2016FuPrT.144..299Z |url=https://eprints.whiterose.ac.uk/96236/1/MANUSCRIPT%20-%20AS%20RESUBMITTED%205-1-2016.pdf }}</ref>