Application of distributed activation energy models to polymer pyrolysis: Effects of distributed model selection, characteristics, validation, and sensitivity analysis

Li, Mi; Liu, Lu; Jiang, Lin; Gou, Fu-Hai; Sun, Jinhua

doi:10.1016/j.fuel.2019.06.002

Cited by 37 publications

(12 citation statements)

References 52 publications

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“…Of the one parameter models, the n th-order approach is superior, particularly for the coal. Li et al found a similar result for various polymers, plus they considered more cases for added insight. Adding reaction order to the Weibull distribution provided no significant benefit, but adding reaction order to the symmetric logistic model provided fits comparable to the n th-order Gaussian and Weibull distributions.…”

Section: Comparison Of Distribution Methodsmentioning

confidence: 70%

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Historical Perspective on the Maturation of Modeling Coal and Kerogen Pyrolysis

Burnham

2021

Energy Fuels

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Oil supply disruptions in the 1970s combined with advances in computers spurred a substantial increase in mathematical modeling of fossil fuel exploration and utilization. One aspect of this work was the broad adoption of various distributed reactivity models for coal and kerogen pyrolysis, which was accomplished in various ways, including activation energy distribution and lattice models. Many of the important advances were published in Energy & Fuels, whose establishment was prompted by this large increase in energy-related research. This paper reviews those advances, starting with some seminal papers in the 1970s followed by the maturation of those approaches in the 1980s and early 1990s, with an emphasis on highly cited papers published in the first 15 years of Energy & Fuels. These methods and kinetic parameters therefrom continue to be used today. However, many current researchers may not appreciate the advantages and disadvantages of various approaches and merely follow the practices of their specialty group without considering potentially better approaches.

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Section: Comparison Of Distribution Methodsmentioning

confidence: 70%

“…Cai et al 23 considered the logistic distribution for cellulose pyrolysis. Li et al 24 also considered a uniform distribution, also called a rectangular distribution, for polymer pyrolysis. Distributions other than the Gaussian can be asymmetric, and the gamma and Weibull distributions provide a threshold value.…”

Section: Types Of E Distributionsmentioning

confidence: 99%

Historical Perspective on the Maturation of Modeling Coal and Kerogen Pyrolysis

Burnham

2021

Energy Fuels

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“…In the field of micro scale calorimetry, most researchers used thermogravimetric analysis and differential scanning calorimetry to study the pyrolysis kinetics of combustible materials, which can be used as a reference to evaluate the flammability of materials [ 4 , 5 , 6 ]. In recent years, MCC has been developed and widely employed to evaluate the flammability of materials with advantages of only with milligram level samples and rapid heating rates.…”

Section: Introductionmentioning

confidence: 99%

Wood Dust Flammability Analysis by Microscale Combustion Calorimetry

Jiang

Majlingová

et al. 2021

Polymers

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To study the practicability of a micro combustion calorimeter to analyze the calorimetry kinetics of wood, a micro combustion calorimeter with 13 heating rates from 0.1 to 5.5 K/s was used to perform the analysis of 10 kinds of common hardwood and softwood samples. As a microscale combustion measurement method, MCC (microscale combustion calorimetry) can be used to judge the flammability of materials. However, there are two methods for measuring MCC: Method A and Method B. However, there is no uniform standard for the application of combustible MCC methods. In this study, the two MCC standard measurement Methods A and B were employed to check their practicability. With Method A, the maximum specific heat release rate, heat release temperature, and specific heat release of the samples were obtained at different heating rates, while for Method B, the maximum specific combustion rate, combustion temperature and net calorific values of the samples were obtained at different heating rates. The ignition capacity and heat release capacity were then derived and evaluated for all the common hardwood and softwood samples. The results obtained by the two methods have significant differences in the shape of the specific heat release rate curves and the amplitude of the characteristic parameters, which lead to the differences of the derived parameters. A comparison of the specific heat release and the net calorific heat of combustion with the gross caloric values and heating values obtained by bomb calorimetry was also made. The results show that Method B has the potentiality to evaluate the amount of combustion heat release of materials.

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“…Chen et al [ 13 ] noted that pyrolysis was considered to be an effective method for recycling polymer waste. Furthermore, Li et al [ 14 ] pointed out that pyrolysis has become a sustainable and environmental-friendly approach to achieve valuable fuel from polymer. Meanwhile, in recent decades, extensive usage of exterior wall insulation materials of buildings has caused a considerable number of high-rise fires [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Energy Utilization of Building Insulation Waste Expanded Polystyrene: Pyrolysis Kinetic Estimation by a New Comprehensive Method

Zhang

et al. 2020

Polymers

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Expanded polystyrene (EPS) has excellent thermal insulation properties and is widely applied in building energy conservation. However, these thermal insulation materials have caused numerous fires because of flammability. Pyrolysis is necessary to support combustion, and more attention should be paid to the pyrolysis characteristics of EPS. Moreover, pyrolysis is considered to be an effective method for recycling solid waste. Pyrolysis kinetics of EPS were analyzed by thermogravimetric experiments, both in nitrogen and air atmospheres. A new method was proposed to couple the Flynn–Wall–Ozawa model-free method and the model-fitting method called the Coats–Redfern as well as the particle swarm optimization (PSO) global algorithm to establish reaction mechanisms and their corresponding kinetic parameters. It was found that the pyrolysis temperature of EPS was concentrated at 525–800 K. The activation energy of EPS in nitrogen was about 163 kJ/mol, which was higher than that in air (109.63 kJ/mol). Furthermore, coupled with Coats–Redfern method, reaction functions g(α) = 1 − (1 − α)3 and g(α) = 1 − (1 − α)1/4 should be responsible for nitrogen and air reactions, respectively. The PSO algorithm was applied to compute detailed pyrolysis kinetic parameters. Kinetic parameters could be used in further large-scale fire simulation and provide guidance for reactor design.

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Application of distributed activation energy models to polymer pyrolysis: Effects of distributed model selection, characteristics, validation, and sensitivity analysis

Cited by 37 publications

References 52 publications

Historical Perspective on the Maturation of Modeling Coal and Kerogen Pyrolysis

Historical Perspective on the Maturation of Modeling Coal and Kerogen Pyrolysis

Wood Dust Flammability Analysis by Microscale Combustion Calorimetry

Energy Utilization of Building Insulation Waste Expanded Polystyrene: Pyrolysis Kinetic Estimation by a New Comprehensive Method

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