Investigation of the thermal conversion behavior and reaction kinetics of the pyrolysis of bio-based polyurethane: A reference study

Sun, Yuhang; Cai, Di; Yang, Yanrong; Chen, Xinyang; Wang, Binhui; Yao, Zhitong; Jin, Meiqing; Liu, Jie; Reinmöller, Markus; Alves, José Luiz Francisco

doi:10.1016/j.biombioe.2022.106681

Cited by 7 publications

(5 citation statements)

References 51 publications

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“…In addition, with an increase of the heating rate, the modified RPUFs exhibited heat transfer delay, causing the pyrolysis curves of the modified RPUFs to move together towards the high‐temperature area. The reason for this phenomenon was that when the heating rate was too fast, the heat cannot be immediately transferred to the modified RPUFs, resulting in their incomplete decomposition 12 . Therefore, the complete decomposition of the modified RPUFs required a higher temperature.…”

Section: Resultsmentioning

confidence: 99%

“…The reason for this phenomenon was that when the heating rate was too fast, the heat cannot be immediately transferred to the modified RPUFs, wileyonlinelibrary.com/journal/pi resulting in their incomplete decomposition. 12 Therefore, the complete decomposition of the modified RPUFs required a higher temperature. From Table 1, it can be seen that the initial thermal mass loss temperatures of RPUF-HK5-2.5AL, RPUF-HK5-5AL, RPUF-HK-7.5AL and RPUF-HK5-10AL were 175.51, 176.43, 185.04 and 181.58 °C, respectively.…”

Section: Tg Analysismentioning

confidence: 99%

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Improved thermal stability and flame‐retardant performance of rigid polyurethane foam modified by hydrolyzed keratin‐modified polyol and aluminium hypophosphite

Zhang,

Wang,

Sun

et al. 2024

Polymer International

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Rigid polyurethane foam (RPUF) was prepared by hydrolyzed keratin‐modified polyol and aluminum hypophosphite as flame retardants. The effects of aluminum hypophosphite on the thermal stability and flame retardant properties of hydrolyzed keratin‐modified RPUFs were studied by limiting oxygen index (LOI) method, thermogravimetric analysis, pyrolysis kinetic analysis, cone analysis and smoke density analysis (Ds). The results showed that RPUF added with 7.5 wt% aluminum hypophosphite (RPUF‐HK5‐7.5AL) had the highest LOI, which was 26.1%. RPUF‐HK5‐7.5AL had the highest initial decomposition temperature, the highest heating rate of 10°C/min T5%, and the highest activation energy. In addition, RPUF‐HK5‐7.5AL possessed the lowest heat release rate at 50 kW/m2, at 125.10 kW/m2, and the lowest total heat release rate at 5.30 MJ/m2. Such indicated that RPUF‐HK5‐7.5AL had the best thermal stability and flame retardant properties. SEM showed that hydrolyzed keratin and aluminum hypophosphite had a synergistic effect on the flame retardancy of the RPUFs. The current research results provided a useful reference for the preparation of RPUFs with good flame retardant properties by bio‐based modification.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Section: Tg Analysismentioning

confidence: 99%

Improved thermal stability and flame‐retardant performance of rigid polyurethane foam modified by hydrolyzed keratin‐modified polyol and aluminium hypophosphite

Zhang,

Wang,

Sun

et al. 2024

Polymer International

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“…This was consistent with previous TG analysis and kinetic studies in 3.2 , 3.5 , respectively. The integral form G(a) corresponding to these models and experimental data were integrated into the CR equation [41] , and the lines were fitted using the least square method. The resulted E a , A and R 2 were listed in Table 5 .…”

Section: Resultsmentioning

confidence: 99%

Pyrolysis behavior, kinetics, and thermodynamics of waste pharmaceutical blisters under CO2 atmosphere

Wang

Yao

Reinmöller

et al. 2023

Journal of Analytical and Applied Pyrolysis

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“…The Kissinger-Akahira-Sunose (KAS) [23] method is suitable for all kinetic analyses because it allows for the determination of activation energy without determining the reaction model.…”

Section: Analysis Of Kissinger-akahira-sunose (Kas) Methodsmentioning

confidence: 99%

“…The Flynn-Wall-Ozawa (FWO) [23] method is an isoconversion rate method because its equations do not need to be converted into the explicit form of a function. The FWO equations are as follows:…”

Section: Analysis Of Flynn-wall-ozawa (Fwo) and Starink Methodsmentioning

confidence: 99%

Pyrolysis Behavior and Kinetics of Typical Crop Straw in Henan Province at Different Heating Rates

Hu,

Hou,

Lan

et al. 2023

Processes

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Straw, which is characterized by its low cost, large quantity, and rich supply of biomass energy, is often converted into energy that can be utilized in industrial production through pyrolysis technology. This paper examines the pyrolysis experiments of four kinds of straw (rice, wheat, peanut, and corn) from the Henan Province of China, conducted in an air environment with varying temperature-rise rates. Based on the experimental results, an analysis was conducted on the effect of the rate of temperature rise on the degree of straw pyrolysis and the pyrolysis characteristics of each type of straw. The activation energies of the pyrolysis reactions were calculated utilizing the Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO), and Starink methods. It was concluded that the pyrolysis process of all four types of straw could roughly be classified into three stages: dehydration and drying stage, volatile release stage, and carbonization stage. Among the four types of straw evaluated, rice straw exhibited the most favorable combustion performance, while wheat straw demonstrated the best pyrolysis effect. Increasing the heating rate resulted in a pronounced thermal hysteresis effect during the straw’s pyrolysis, as evidenced by the TG and DTG curves shifting toward higher temperatures. The reaction speed increased as the heating rate increased, and the amount of residual carbon displayed an upward trend.

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Investigation of the thermal conversion behavior and reaction kinetics of the pyrolysis of bio-based polyurethane: A reference study

Cited by 7 publications

References 51 publications

Improved thermal stability and flame‐retardant performance of rigid polyurethane foam modified by hydrolyzed keratin‐modified polyol and aluminium hypophosphite

Improved thermal stability and flame‐retardant performance of rigid polyurethane foam modified by hydrolyzed keratin‐modified polyol and aluminium hypophosphite

Pyrolysis behavior, kinetics, and thermodynamics of waste pharmaceutical blisters under CO2 atmosphere

Pyrolysis Behavior and Kinetics of Typical Crop Straw in Henan Province at Different Heating Rates

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