Investigation of kinetic and thermodynamic parameters approaches to non-isothermal pyrolysis of mustard stalk using model-free and master plots methods

Patidar, Kalpana; Singathia, Ajit; Vashishtha, Manish; Sangal, Vikas Kumar; Upadhyaya, Sushant

doi:10.1016/j.mset.2021.11.001

Cited by 19 publications

(13 citation statements)

References 41 publications

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“…Lai et al (2021) [ 30 ] and Li et al (2022) [ 31 ] used only the first order of CR because it is considered as the main mechanism. Patidar et al (2022) [ 32 ] revealed that the diffusion model was best suited to reflect the degradation process using the CR method.…”

Section: Resultsmentioning

confidence: 99%

Kinetics Study of Polypropylene Pyrolysis by Non-Isothermal Thermogravimetric Analysis

Dubdub

2023

Materials

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Polypropylene (PP) is considered as one of six polymers representative of plastic wastes. This paper attempts to obtain information on PP polymer pyrolysis kinetics with the help of thermogravimetric analysis (TGA). TGA is used to measure the weight of the sample with temperature increases at different heating rates—5, 10, 20, 30, and 40 K min−1—in inert nitrogen. The pyrolytic kinetics have been analyzed by four model-free methods—Friedman (FR), Flynn–Wall–Qzawa (FWO), Kissinger–Akahira–Sunose (KAS) and Starnik (STK)—and by two model-fitting methods—Coats–Redfern (CR) and Criado methods. The values of activation energies of PP polymer pyrolysis at different conversions are in good agreement with the average of (141, 112, 106, 108 kJ mol−1) for FR, FWO, KAS and STK, respectively. Criado methods have been implemented with the CR method to obtain the reaction mechanism model. As per Criado’s method, the most controlling reaction mechanism has been identified as the geometrical contraction models—cylinder model.

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Section: Resultsmentioning

confidence: 99%

Kinetics Study of Polypropylene Pyrolysis by Non-Isothermal Thermogravimetric Analysis

Dubdub

2023

Materials

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“…It can be noted that activation energy values have small fluctuations in the conversion range (α = 0.2-0.8) regardless of the method used. They are related to complex multi-step reactions such as competitive, parallel, and successive reactions occurring during pyrolysis [32]. These results are illustrated in Figure 3, where these variations can be better visualized.…”

Section: Kinetic Studymentioning

confidence: 93%

“…10 and 11, where P(x) is expressed by Eq. 12 [31], where f(α) and g(α) are different solid-state reaction models shown in Table 1 [32].…”

Section: Master Plot Modified Methodsmentioning

confidence: 99%

Thermokinetic and Thermodynamic Parameters for Catalytic Pyrolysis of Medium Density Fiber over Ni/Beta Zeolite

Rangel¹,

Virgens²,

Mayer³

et al. 2022

Catal Res

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Catalytic pyrolysis is an attractive alternative for converting biomass into energy and chemicals to replace fossil sources. This has encouraged the search for efficient catalysts that can directly remove oxygenated products during pyrolysis, since they are the main problem in the processing and use of the products obtained. The catalytic and non-catalytic pyrolysis of medium density fiber (MDF) over beta zeolite-supported nickel (3 and 5%) was performed using the biomass/catalyst of 1.0/0.2 ratio. The thermokinetic and thermodynamic parameters were determined using the isoconversional and non-isothermal methods of Flynn-Wall-Ozawa (FWO), Kissinger-Ahakira-Sunose (KAS) and Friedman. In addition, the master plots by the Criado method were used to determine the most suitable theoretical solid-state mechanism. The thermodynamic parameters were also obtained using the Friedman method. The results showed that the addition of the catalyst decreased the activation energy and affected the initial, final and maximum decomposition temperatures, which was related to the superficial acidic sites of beta zeolite that promote cracking and hydrocracking reactions. Nickel further decreased this parameter due to the activity of this metal in hydrodeoxygenation/deoxygenation, oligomerization and dehydration. The Friedman method provided the best correlation coefficient among the methods and was used to determine the thermodynamic parameters. The results showed that E<sub>a</sub> increases in the order: MB3Ni < MB5Ni < MB < M.

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“…Of these, pyrolysis can convert biomass into various energy products, e.g., bio-char, bio-oil, and biogas . Patidar et al (2022) studied the pyrolysis of different biomasses and analyzed their potential applications for bioenergy production. During pyrolysis, the kinetic and thermodynamic analyses are crucial for comprehending the thermal degradation behavior as well as process design and optimization. , Singh et al (2021) gave some insights into the kinetic and thermodynamic behaviors of the pyrolysis of rice straw.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis Characteristics and Determination of Kinetic and Thermodynamic Parameters of Raw and Torrefied Chinese Fir

Patil,

Ku,

Vasudev

2023

ACS Omega

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Torrefaction influences the structural and physicochemical properties of biomass, thus further altering its thermal degradation behavior. In this study, the pyrolysis characteristics, reaction kinetics, and thermodynamic parameters of raw and torrefied Chinese fir (CF) were investigated. The torrefaction was conducted at 220 °C (mild) and 280 °C (severe), the pyrolysis was performed from ambient temperature to 600 °C, and four different heating rates (i.e., 5, 15, 25, and 35 °C/min) were adopted. The activation energy for pyrolysis was estimated by adopting three isoconversional methods. The master-plot method was employed to analyze the reaction mechanism. Furthermore, thermodynamic parameters, i.e., the enthalpy change (ΔH), Gibbs free energy change (ΔG), and entropy change (ΔS), were calculated. The average activation energy increased with the torrefaction temperature, whose values estimated by using different methods ranged from 88.57 to 97.70, from 121.04 to 126.35, and from 167.51 to 179.74 kJ/mol for raw, mildly, and severely torrefied CF samples, respectively. A compensation effect between the activation energy and pre-exponential factor was observed for all samples. The degradation process was characterized as endothermic, involving the formation of activated complexes and requiring extra energy for torrefied samples.

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Investigation of kinetic and thermodynamic parameters approaches to non-isothermal pyrolysis of mustard stalk using model-free and master plots methods

Cited by 19 publications

References 41 publications

Kinetics Study of Polypropylene Pyrolysis by Non-Isothermal Thermogravimetric Analysis

Kinetics Study of Polypropylene Pyrolysis by Non-Isothermal Thermogravimetric Analysis

Thermokinetic and Thermodynamic Parameters for Catalytic Pyrolysis of Medium Density Fiber over Ni/Beta Zeolite

Pyrolysis Characteristics and Determination of Kinetic and Thermodynamic Parameters of Raw and Torrefied Chinese Fir

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