Kinetic constants of polymeric materials from thermogravimetric data

Urzendowski, S. R.; Guenther, Arthur H.

doi:10.1007/bf02188645

Cited by 17 publications

(2 citation statements)

References 17 publications

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“…Various authors reported the apparent activation energy (E a ) of PE pyorlysis after performing kinetics computations on the results obtained which is the main parameters estimated in thermal and catalytic degradation reaction studies The E a for HDPE ranged between 206 to 445 kJ mol -1 (Mucha, 1976;Urzendowski and Guenther, 1971;Wu et al 1993;Westerhout et al, 1997a;1997b, Bockhorn et al, 1999a1999c;Sorum et al, 2001), while for LDPE the range obtained was reported to be between 163 to 303 kJ mol -1 (Mucha, 1976;Urzendowski and Guenther, 1971;Westerhout et al, 1997b). The reaction chemistry of PE depolymerisation was reported by Bockhorn et al (1999a).…”

Section: Degradation Kinetics Studies and Mechanism Of Reactionsmentioning

confidence: 99%

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

Al–Salem

Антелава

Constantinou

et al. 2017

Journal of Environmental Management

873

435

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Plastic plays an important role in our daily lives due to its versatility, light weight and low production cost. Plastics became essential in many sectors such as construction, medical, engineering applications, automotive, aerospace, etc. In addition, economic growth and development also increased our demand and dependency on plastics which leads to its accumulation in landfills imposing risk on human health, animals and cause environmental pollution problems such as ground water contamination, sanitary related issues, etc. Hence, a sustainable and an efficient plastic waste treatment is essential to avoid such issues. Pyrolysis is a thermo-chemical plastic waste treatment technique which can solve such pollution problems, as well as, recover valuable energy and products such as oil and gas. Pyrolysis of plastic solid waste (PSW) has gained importance due to having better advantages towards environmental pollution and reduction of carbon footprint of plastic products by minimizing the emissions of carbon monoxide and carbon dioxide compared to combustion and gasification. This paper presents the existing techniques of pyrolysis, the parameters which affect the products yield and selectivity and identify major research gaps in this technology. The influence of different catalysts on the process as well as review and comparative assessment of pyrolysis with other thermal and catalytic plastic treatment methods, is also presented.

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Section: Degradation Kinetics Studies and Mechanism Of Reactionsmentioning

confidence: 99%

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

Al–Salem

Антелава

Constantinou

et al. 2017

Journal of Environmental Management

873

435

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“…However, the radical reactions that occur during pyrolysis generate a highly complex mixture of products via a poorly understood network of reactions. Figure illustrates just a few of the numerous compounds that have been reported in the literature. − In general, LDPE first passes through a depolymerized melt-phase intermediate rich in radical species. , These radicals react to form primary products (Figure , black pathways), after which these primary products can also form secondary and higher order products (Figure , red pathways) through further reaction and interconversion. ,,,− …”

Section: Introductionmentioning

confidence: 99%

Intrinsic Millisecond Kinetics of Polyethylene Pyrolysis via Pulse-Heated Analysis of Solid Reactions

et al. 2023

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Continued demand for polyolefins can be met by recycling plastic materials back to their constituent monomers, ethylene and propylene, via thermal cracking in a pyrolysis reactor. During pyrolysis, saturated polyolefin chains break carbon−carbon and carbon−hydrogen bonds, yielding a distribution of alkanes, alkenes, aromatic chemicals, light gases, and solid char residues at temperatures varying from 400 to 800 °C. To design a pyrolysis reactor that optimizes the chemistry for a maximum yield of light olefins, a detailed description of the chemical mechanisms and associated kinetics is required. To that end, the reaction kinetics of isothermal films of low-density polyethylene (LDPE) have been measured by the method of "pulse-heated analysis of solid reactions", or PHASR, which allows for quantification of intrinsic kinetics via isothermal reaction-controlled experimental conditions. The evolution of LDPE films from 20 ms to 2.0 s for five temperatures (550, 575, 600, 625, and 650 °C) was characterized by measurement of the yield of chromatography-detectable compounds (

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A study on the thermal behaviour of anisole resins

Patel¹,

Patel²,

Patel³

1981

Angew. Makromol. Chem.

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An attempt has been made to prepare thermally stable resins from the condensation of anisole and 1,2-dichloroethane. The anisole resin samples were subjected to the thermal study involving TG and DTA techniques. The kinetic parameters and the stability of the resins have been investigated. ZUSAMMENFASSUNG:Es wurde der Versuch gemacht, thermisch stabile Harze durch Kondensation von Anisol und 1 ,ZDichlorethan herzustellen. Die Harzproben wurden mit Hilfe der TG und der DTA untersucht. Die kinetischen Parameter und die Stabilitat der Harze wurden bestimmt.

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Kinetic constants of polymeric materials from thermogravimetric data

Cited by 17 publications

References 17 publications

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

Intrinsic Millisecond Kinetics of Polyethylene Pyrolysis via Pulse-Heated Analysis of Solid Reactions

A study on the thermal behaviour of anisole resins

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