Chlorine removal from the pyrolysis of urban polyolefinic waste in a semi-batch reactor

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dc.contributor.authorTorres, Daniel
dc.contributor.authorJiang, Ying
dc.contributor.authorSanchez Monsalve, D. A.
dc.contributor.authorLeeke, Gary
dc.date.accessioned2021-02-03T17:10:35Z
dc.date.available2021-02-03T17:10:35Z
dc.date.issued2020-12-11
dc.description.abstractThe pyrolysis of urban chlorine-containing polyolefinic plastic waste with simultaneous retention of HCl is investigated. Different chemical removers based on sodium, calcium and zinc bases, and different adsorbents based on alumina or zeolites were used inside the reactor or in downstream hot filters, respectively, for chlorine removal and upgrading of pyrolysis oils. Initially, polyolefin waste (POW, containing a 98.5 wt% polyolefins) was thermogravimetrically pyrolyzed to determine its thermal behaviour. Subsequently, chemical removers were mixed with the POW which was pyrolyzed at 480 °C in a semi-batch reactor. The adsorbents were tested separately in hot filters (300 ± 20 °C) downstream of the pyrolysis reactor. After the pyrolysis, the resulting char containing the chemical removers and the absorbents in the hot filters were analysed by FTIR, CHN elemental analysis and ESEM-EDS to determine their respective chlorine contents. The highest chlorine retention was 23.8 wt% for chemical remover when used in direct contact with POW, while a zeolite used in the hot filter (gas streams) gave a chlorine retention of 65.6 wt%. The pyrolytic liquids consisted of mixtures of C7-C40 hydrocarbons made up of olefinic and aliphatic hydrocarbons with a very low presence of aromatics (estimated to be below 3 wt% by HPLC). In most cases, the chlorine removal processes resulted in waxier pyrolytic oils and with a higher degree of branchingen_UK
dc.identifier.citationTorres D, Jiang Y, Monsalve DS, Leeke GA. (2021) Chlorine removal from the pyrolysis of urban polyolefinic waste in a semi-batch reactor. Journal of Environmental Chemical Engineering, Volume 9, Issue 1, February 2021, Article number 104920en_UK
dc.identifier.issn2213-3437
dc.identifier.urihttps://doi.org/10.1016/j.jece.2020.104920
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/16299
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectPlastic pyrolytic oilsen_UK
dc.subjectHydrochloric acid removersen_UK
dc.subjectPolyolefinic waste treatmenten_UK
dc.subjectDehydrochlorination of plastic wasteen_UK
dc.subjectChlorine removalen_UK
dc.subjectPyrolysis of chlorinated plastic wasteen_UK
dc.titleChlorine removal from the pyrolysis of urban polyolefinic waste in a semi-batch reactoren_UK
dc.typeArticleen_UK

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