Waste tires pyrolysis kinetics and reaction mechanisms explained by TGA and Py-GC/MS under kinetically-controlled regime

Menares, Tamara; Herrera, Jesús; Romero, Romina; Osorio, Paula; Arteaga-Pérez, Luis E.

doi:10.1016/j.wasman.2019.10.027

Cited by 115 publications

(44 citation statements)

References 42 publications

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“…This difference between the Ea values, demonstrates an important catalytic effect of the Ni/SiO2, which could be explained by changes in the reaction routes taking place or due to the formation of stable complexes. The Ea values agree with previous literature for similar residues and different kinetic methods [19,26]. With the Ea values in hand, a proposal of a plausible reaction model can be done by using the z(α) and y(α) master plots approach.…”

Section: Isoconversional Methodssupporting

confidence: 86%

“…The D,L-limonene, has been reported as a major product during waste tire pyrolysis [19,[51][52][53][54]. This study detected a percentage oscillating between 20 and 40% of the total chromatogram area, with or without the catalyst.…”

Section: Implications Of Ni-catalyst Presence On Reaction Pathwaysmentioning

confidence: 73%

“…The thermogravimetric analyses were performed under flowing He (50 mL min -1 ) using ~2 mg of the WT and heating rates of 10, 20, 25, and 40 °C min -1 . The studied temperature varied from ambient to 600 °C [19]. In all the experiments the catalyst-to-tire mass ratio was fixed at 8:1, to avoid the overloading of the TGA crucible, reducing in this way the mass and heat transfer limitations, and guarantying the measurements under a kinetically controlled regime [20].…”

Section: Experimental Equipment and Methods For Catalytic Activity 231 Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

“…The thermal degradation of the WTs has demonstrated to be ruled by a multi-reaction mechanism, thus using a single kinetic model for its description is an oversimplification. Therefore, the kinetic describing the regular and catalytic pyrolysis of waste tires is usually studied by applying iso-conversional methods [19,21]. At the moment, there is a myriad of kinetic studies validating the applicability of iso-conversional methods to waste tires pyrolysis [22][23][24][25][26].…”

Section: Kinetic Modeling Via P(y)-isoconversional Methodsmentioning

confidence: 99%

“…Traces of inorganic elements were quantified by inductively coupled plasma optical emission spectrometry (ICP-OES) using a PerkinElmer Optima 7000 DV ICP-OES series instrument. More details of methods and equipment can be found in [19].…”

Section: Waste Tires Characterizationmentioning

confidence: 99%

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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: Isoconversional Methodssupporting

confidence: 86%

Section: Implications Of Ni-catalyst Presence On Reaction Pathwaysmentioning

confidence: 73%

Section: Experimental Equipment and Methods For Catalytic Activity 231 Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Section: Kinetic Modeling Via P(y)-isoconversional Methodsmentioning

confidence: 99%

Section: Waste Tires Characterizationmentioning

confidence: 99%

See 3 more Smart Citations

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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Thermo‐catalytic pyrolysis of wastes using bimetal‐modified ZSM ‐5 catalyst: investigation of the reaction kinetic parameters

et al. 2021

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The decomposition of waste polymers and the main reaction kinetic parameters of the pyrolysis have been discussed based on thermogravimetric analysis (TGA) using Me/Ni/ZSM-5 catalysts (Me = Ca, Ce, La, Mg, Mn). Mainly, the effect of the raw materials (polyolefin, polyethylene terephthalate) and catalyst presence to the weight loss were investigated. The tested catalysts can effectively reduce the activation energies of the waste pyrolysis. However, different tendencies were found in case of different raw materials. Based on results, the La/Ni/ZSM-5 catalyst was further investigated using raw material: catalyst ratio of 2:1, 1:1, 1:2 and 1:3 by both TG instrument and tubular furnace reactor at 500 C and 900 C. Mainly, the gas composition and the syngas yield were investigated. The lowest activation energy and the highest yield of the syngas (92.3 mmol/g raw material using pyrolysis-reforming 900 C) were found in case of raw material:catalyst ratio of 2:1.

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Valorization of waste tire by pyrolysis and hydrothermal liquefaction: a mini-review

Hu¹,

Attia²,

Tsabet³

et al. 2021

J Mater Cycles Waste Manag

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Waste tires pyrolysis kinetics and reaction mechanisms explained by TGA and Py-GC/MS under kinetically-controlled regime

Cited by 115 publications

References 42 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

Thermo‐catalytic pyrolysis of wastes using bimetal‐modified ZSM ‐5 catalyst: investigation of the reaction kinetic parameters

Valorization of waste tire by pyrolysis and hydrothermal liquefaction: a mini-review

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