Pyrolytic transformation behavior of hydrocarbons and heteroatom compounds of scrap tire volatiles

Pan, Yuhan; Yang, Diancai; Sun, Kai; Wang, Xinwen; Zhou, Yuwei; Huang, Qunxing

doi:10.1016/j.fuel.2020.118095

Cited by 37 publications

(13 citation statements)

References 45 publications

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“…5a) were also detected in the pyrolysis products. The main compound detected N-containing was 1,2-dihydro-2,2,4-trimethylquinoline, and S-containing was benzothiazole coming from antioxidants and vulcanizing accelerator, respectively, in agreement with previous reports [3,[48][49][50]. As shown in Fig.…”

Section: Evaluation Of Pyrolytic Products Via Py-gc/ms Analysissupporting

confidence: 91%

Thermal Behavior, Reaction Pathways and Kinetic Implications of Using a Ni/SiO2 Catalyst for Waste Tire Pyrolysis

Osorio-Vargas

Lick

Sobrevía

et al. 2021

Waste Biomass Valor

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Catalytic pyrolysis has been used to upgrading the quality of pyrolytic liquids. Herein, we report a comprehensive study on the catalytic pyrolysis of waste tires using Ni/SiO2 as catalysts. The analyses were carried out by combining thermogravimetry (TGA), TGA interfaced to a Fourier Transform Infrared spectrometer (TGA-FTIR), and pyrolysis coupled to gas chromatography/mass spectrometer (Py-GC/MS) techniques. During waste tire decomposition, the main functional groups detected in the FTIR were alkenes, aromatics, and heteroatoms-containing groups such as nitrogen, sulfur, and oxygen. Meanwhile, by Py-GC/MS were identified mainly D,L-limonene, isoprene, benzene, toluene, xylenes (BTX), and p-cymene. The Py-GC/MS experiments at three different temperatures (350, 400, and 450 °C) suggested an effect of the catalyst on product distribution. The Ni catalyst promoted cyclization reactions and subsequently aromatization, leading to an improved vapors composition. The use of iso-conversional kinetic models along with master plots allows proposing a multiple-step reaction mechanism, which was well described by the Avrami-Erofeev, Random Scission, and truncated Sestak-Berggren models. The values of activation energies show differences for the catalyzed and uncatalyzed pyrolysis (111.0 kJ mol -1 and 168.4 kJ mol -1 ), validating the effectivity of Ni/SiO2. Finally, the thermal Biot (>1) and Py I and Py II numbers (10 -3

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Section: Evaluation Of Pyrolytic Products Via Py-gc/ms Analysissupporting

confidence: 91%

Thermal Behavior, Reaction Pathways and Kinetic Implications of Using a Ni/SiO2 Catalyst for Waste Tire Pyrolysis

Osorio-Vargas

Lick

Sobrevía

et al. 2021

Waste Biomass Valor

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“…Benzothiazole is not the vulcanizer per se but is a predominant pyrolysis product of the primary vulcanization accelerators used in tyre production. Vulcanization accelerators make up 1.2 % in relative content of scrap tyres and include the thiazoles, sulfonamides, thiurams and guanidine 57 .…”

Section: Quantification Of Tyre Particles At Their Points Of Entry To...mentioning

confidence: 99%

Quantifying the release of tyre wear particles to the marine environment via multiple pathways

Parker-Jurd

Napper

Abbott

et al. 2021

Marine Pollution Bulletin

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“…The sulfur content remains at approximately 2.5% and 3.1% in the case of mix and truck ELT, respectively. The great thermal stability of sulfur compounds, both organic and inorganic, means that most of the sulfur contained in the tires, approximately 67% in the case of truck tires and 56% in the case of mix tires, remains in the solid fraction [75,76].…”

Section: Solid Productsmentioning

confidence: 99%

Influence of Specific Power on the Solid and Liquid Products Obtained in the Microwave-Assisted Pyrolysis of End-of-Life Tires

et al. 2022

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In this work, chemical recycling as an alternative to conventional end-of-life treatments was studied. Two different types of end-of-life tires (ELT), truck tires and mix tires (50:50 mixture of passenger car and truck tires), were pyrolyzed in a batch microwave reactor. The influence of specific power (10, 20, and 30 W/g) on mass distribution was analyzed. The maximum liquid yield was attained at 10 W/g, while the maximum gas yield is obtained at 30 W/g. Liquid fractions were characterized by gas chromatography/quadrupole mass spectrometry (GC/qMS) to identify the main components, and major compounds were quantified. In all samples, limonene (3.76 ± 0.31–6.80 ± 2.37 wt. %) and BTEX (3.83 ± 0.20–1.19 ± 2.80 wt. %) were the main components. Major limonene concentration is obtained in oil produced from truck ELT while higher yields of aromatic compounds are obtained from mix ELT. The maximum BTEX concentration is obtained at 10 W/g being toluene the main compound with a concentration of 2.07 ± 0.42 and 4.63 ± 1.29 for truck and mix ELT, respectively. The separation and purification of these compounds will confer important value to these fractions. Higher yields of the solid fraction are produced when mix tires are pyrolyzed due to the higher concentration of ash in this type of ELT. Recovered carbon black was characterized by measuring the surface area.

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Pyrolytic transformation behavior of hydrocarbons and heteroatom compounds of scrap tire volatiles

Cited by 37 publications

References 45 publications

Thermal Behavior, Reaction Pathways and Kinetic Implications of Using a Ni/SiO2 Catalyst for Waste Tire Pyrolysis

Thermal Behavior, Reaction Pathways and Kinetic Implications of Using a Ni/SiO2 Catalyst for Waste Tire Pyrolysis

Quantifying the release of tyre wear particles to the marine environment via multiple pathways

Influence of Specific Power on the Solid and Liquid Products Obtained in the Microwave-Assisted Pyrolysis of End-of-Life Tires

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