Aromatic hydrocarbons formation during coal pyrolysis

Cypres, René

doi:10.1016/0378-3820(87)90030-0

Cited by 159 publications

(65 citation statements)

References 8 publications

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“…It can be seen that the proportion of aromatics increases with pyrolysis temperature, which is in agreement with the results obtained by other researchers [8,11,25,[37][38][39]. The formation of aromatics at the expense of aliphatics when temperature is raised has been verified by several researchers [41][42][43] in studies on pure hydrocarbon compounds. Lucchesi and Maschio [25] found an increase in oil aromaticity with temperature, by studying the H/C ratio.…”

Section: Gas Chromatography/mass Spectroscopy (Gc/ms) Analysissupporting

confidence: 92%

Characterization of the liquid products obtained in tyre pyrolysis

Laresgoiti

Caballero

Marco

et al. 2004

Journal of Analytical and Applied Pyrolysis

315

199

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Section: Gas Chromatography/mass Spectroscopy (Gc/ms) Analysissupporting

confidence: 92%

Characterization of the liquid products obtained in tyre pyrolysis

Laresgoiti

Caballero

Marco

et al. 2004

Journal of Analytical and Applied Pyrolysis

315

199

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“…5 suggests that rapid heating rate pyrolysis caused an intensification of the high temperature effects, resulting in the formation of more aromatic compounds. The aromatic compounds are produced from reactions which involve initially the conversion of alkanes to alkenes, then the conversion of alkenes to monocyclic aromatic compounds via Diels-Alder cyclization reactions [31,32], and finally the conversion of monocyclic compounds to polycyclic compounds. These reactions have been reported to be favoured by high temperature, long residence times and high heating rates.…”

Section: Composition Of Liquid Productsmentioning

confidence: 99%

Products from the high temperature pyrolysis of RDF at slow and rapid heating rates

Efika

Onwudili

Williams

2015

Journal of Analytical and Applied Pyrolysis

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The high-temperature pyrolysis behaviour of a sample of refuse derived fuel (RDF) as a model of municipal solid waste (MSW) was investigated in a horizontal tubular reactor between 700 -900 °C , at varying heating rates, and at an extended vapour residence time.Experiments were designed to evaluate the influence of process conditions on gas yields as well as gas and oil compositions. Pyrolysis of RDF at 800 °C and at rapid heating rate resulted in the gas yield with the highest CV of 24.8 MJ m -3 while pyrolysis to 900 °C at the rapid heating rate generated the highest gas yield but with a lower CV of 21.3 MJ m -3 . A comparison of the effect of heating rates on oil products revealed that the oil from slow pyrolysis, contained higher yields of more oxygenates, alkanes (C8 to C39) and alkenes (C8 to C20), while the oil from rapid pyrolysis contained more aromatics, possibly due to the promotion of Diels-Alder-type reactions. IntroductionThere is a continuously growing need for new and sustainable sources of energy in the world as our populations grow and countries become more developed. There is also an increased demand for renewable sources of energy, resulting in increased interests in the processing of municipal solid waste (MSW) as an energy resource both by biochemical and thermochemical means. Among the thermochemical technologies for MSW conversion, pyrolysis is arguably, the most versatile in relation to the flexibility of obtaining primary products. The application of pyrolysis technology to MSW is quite promising as the energy content of the MSW can be extracted in the form of primary pyrolysis products including gas,

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“…PAH of the pyrolysis of PE are formed through secondary reactions via Diels-Alder type reactions involving alkenes and di-alkenes to form benzenes (Cypres, 1987;Williams and Williams, 1999;Depeyre et al, 1985;Fairburn et al, 1990). It should be noted that formation of styrene and phenylacetylene from aliphatic species by reactions R3 and R4 cannot be neglected (Shulka and Koshi, 2012).…”

Section: Mechanism Of Components Degradation To Pah Precursorsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons (PAH) formation from the pyrolysis of different municipal solid waste fractions

et al. 2015

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The formation of 2-4 ring polycyclic aromatic hydrocarbons (PAH) from the pyrolysis of nine different municipal solid waste fractions (xylan, cellulose, lignin, pectin, starch, polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), and polyethylene terephthalate (PET)) were investigated in a fixed bed furnace at 800 °C. The mass distribution of pyrolysis was also reported. The results showed that PS generated the most total PAH, followed by PVC, PET, and lignin. More PAH were detected from the pyrolysis of plastics than the pyrolysis of biomass. In the biomass group, lignin generated more PAH than others. Naphthalene was the most abundant PAH, and the amount of 1-methynaphthalene and 2-methynaphthalene was also notable.Phenanthrene and fluorene were the most abundant 3-ring PAH, while benzo[a]anthracene and chrysene were notable in the tar of PS, PVC, and PET. 2-ring PAH dominated all tar samples, and varied from 40 wt.% to 70 wt.%. For PS, PET and lignin, PAH may be generated directly from the aromatic structure of the feedstock.

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Aromatic hydrocarbons formation during coal pyrolysis

Cited by 159 publications

References 8 publications

Characterization of the liquid products obtained in tyre pyrolysis

Characterization of the liquid products obtained in tyre pyrolysis

Products from the high temperature pyrolysis of RDF at slow and rapid heating rates

Polycyclic aromatic hydrocarbons (PAH) formation from the pyrolysis of different municipal solid waste fractions

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