Kinetic study of low-temperature conversion of plastic mixtures to value added products

Ding, Fei; Luo, Cairong; Zhang, Hairong; Chen, Xinde

doi:10.1016/j.jaap.2011.11.013

Cited by 34 publications

(21 citation statements)

References 33 publications

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“…The average activation energy calculated by Friedman, FWO and modified Coats–Redfern method are 112.8, 111.8 and 109.8 kJmol −1 , respectively and are close to the activation energy calculated using Kissinger method (106.50kJ/mole). Literature reports the activation energy of thermal degradation of pure polymers vary between 196 and 259 kJ/mol for PP 288–318 kJ/mol for HDPE and 204–231 for LDPE . The significant lowering of activation energy of the thermal degradation of non‐woven plastic with major composition PP obtained in our research could be due to the presence of two additives i. e. polyethylene and inorganic filers.…”

Section: Resultsmentioning

confidence: 99%

Kinetics of Thermal Degradation of Non‐Woven Plastics: Model‐Free Kinetic Approach

Patnaik

Panda

2019

ChemistrySelect

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The thermo‐degradative behaviour of non‐woven plastics was studied in order to analyze their thermal stability and subsequent recycling method. Non‐isothermal thermogravimetric experiments using wide range of heating rates of 10, 20, 40, 60, 80,100 °Cmin−1 have been performed from ambient to 900 °C in a thermo‐balance with the objective of determining the kinetic parameters. Four model free kinetic approaches such as Friedman method, Coats‐Redfern (modified) method, Flynn–Wall–Ozawa (FWO) method and Kissinger method have been used to determine kinetic parameters for the two stage degradation of the non‐woven plastic sample including the thermal degradation of synthetic plastics in the first step followed by the subsequent degradation of inorganic fillers in the second step. The activation energy obtained for first stage degradation is found significantly lower (106‐112 kJ/mol) compared to the second stage degradation (191‐202 kJ/mol). This result would help design a process for the valorisation of synthetic polymer and segregation of the filler materials in the plastic sample to be reused further.

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Section: Resultsmentioning

confidence: 99%

Kinetics of Thermal Degradation of Non‐Woven Plastics: Model‐Free Kinetic Approach

Patnaik

Panda

2019

ChemistrySelect

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“…Many authors propose a first order kinetics for the degradation of polymeric materials [38][39][40][41], whose overall kinetic equation is:…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Fast characterization of biomass fuels by thermogravimetric analysis (TGA)

Saldarriaga

Amutio

Olazar

et al. 2015

Fuel

199

104

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“…Experiments are mostly related to pyrolysis of the specific types of plastic materials or their mixtures, different shares of the materials as well as different raw material particle granulations. [10][11][12][13][14][15][16]. All of this makes the comparison of the processes complicated, and causes variations in the published results.…”

Section: Introductionmentioning

confidence: 99%

Temperature and time influence on the waste plastics pyrolysis in the fixed bed reactor

Papuga¹,

Gvero²,

Vukić³

2016

Therm sci

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Pyrolysis as a technique of chemical recycling of plastic materials is causing an increasing level of interest as an environmentally and economically acceptable option for the processing of waste materials. Studies of these processes are carried out under different experimental conditions, in different types of reactors and with different raw materials, which makes the comparison of different processes and the direct application of process parameters quite complex. This paper presents the results of investigation of the influence of temperature in the range of 450-525 °C, on the yield of the process of pyrolysis of waste plastics mixture, composed of 45% polypropylene, 35% low density polyethylene, and 25% high density polyethylene. Also, this paper presents results of the investigation of the effect of the reaction, at intervals of 30-90 minutes, on the yield of pyrolysis of the mentioned waste plastics mixture. Research was conducted in a fixed bed pilot reactor, which was developed for this purpose. The results of the research show that at a temperature of 500 °C, complete conversion of raw materials was achieved, for a period of 45 minutes, with a maximum yield of the pyrolysis oil of 32.80%, yield of the gaseous products of 65.75%, and the solid remains of 1.46%. A further increase of temperature increases the yield of gaseous products, at the expense of reducing the yield of pyrolysis oil. Obtained pyrolysis oil has a high calorific value of 45.96 MJ/kg and in this regard has potential applications as an alternative fuel.

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Kinetic study of low-temperature conversion of plastic mixtures to value added products

Cited by 34 publications

References 33 publications

Kinetics of Thermal Degradation of Non‐Woven Plastics: Model‐Free Kinetic Approach

Kinetics of Thermal Degradation of Non‐Woven Plastics: Model‐Free Kinetic Approach

Fast characterization of biomass fuels by thermogravimetric analysis (TGA)

Temperature and time influence on the waste plastics pyrolysis in the fixed bed reactor

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