Kinetics and thermodynamics of non‐isothermal pyrolysis of <i>Terminalia chebula</i> branches at different heating rates

Thejaswini, Narra; Annapureddy, Praveen Kumar Reddy; Rammohan, Draksharapu; Kishore, Nanda

doi:10.1002/kin.21677

Cited by 7 publications

(2 citation statements)

References 59 publications

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“…The experimental prediction of the reaction mechanism is made using Eq. ( 29), whereas the theoretical form of Z(x) has been presented elsewhere [31,34,35].…”

Section: Criado's Master Plot (Cmp) Approach For Prediction Of Reacti...mentioning

confidence: 99%

Non‐isothermal Thermogravimetric Analysis of Peltophorum pterocarpum and Evaluation of Kinetic Triplet

Thejaswini,

Annapureddy,

Kishore

2024

Chem Eng & Technol

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The primary focus of the twenty‐first century has been on developing new and cleaner fuels from renewable sources. The increasing availability of renewable energy sources in environment, such as lignocellulosic biomass derived from agricultural and forest residues, has created a plethora of opportunities for biofuel production. For this purpose, the search for appropriate waste biomass source and the design of suitable reactors are very essential, where the latter requires the knowledge of kinetic triplets. These requirements paved the way to the novelty of the present work as a selection of a rarely used biomass source, that is, Peltophorum pterocarpum, and its non‐isothermal thermogravimetric analysis for the evaluation of kinetic triplet of the process. The range of temperature is 298–1173 K attained at heating rates of 10–55 K min−1. Kinetics were estimated using differential Friedman method (DFM), distributed activation energy method (DAEM), Ozawa–Flynn–Wall (OFW), Kissinger–Akahira–Sunose (KAS), and Starink (STK) models. Mean activation energy (kJ mol−1) and pre‐exponential factor (min−1) of pyrolysis process by five models were 183.68 and 1.24 × 1017 for DAEM, 194.28 and 3.08 × 1021 for DFM, 183.68 and 4.40 × 1016 for KAS, 184.12 and 2.12 × 1014 for OFW, and 183.93 and 3.56 × 1016 for STK. Average values of changes in Gibbs free energy, enthalpy, and entropy by five models are 174 kJ mol−1, 178 kJ mol−1, and 0.007 kJ mol−1 K−1, respectively. Criado's master plots revealed distinct reaction pathways during the process for different conversion levels.

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“…The experimental prediction of the reaction mechanism is made using Eq. ( 29), whereas the theoretical form of Z(x) has been presented elsewhere [31,34,35].…”

Section: Criado's Master Plot (Cmp) Approach For Prediction Of Reacti...mentioning

confidence: 99%

Non‐isothermal Thermogravimetric Analysis of Peltophorum pterocarpum and Evaluation of Kinetic Triplet

Thejaswini,

Annapureddy,

Kishore

2024

Chem Eng & Technol

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“…In the literature, many results can be found regarding biomass degradation studied with TG-FTIR [12][13][14]. El-Sayed investigated the pyrolysis of municipal solid waste using the TG-FTIR method.…”

Section: Introductionmentioning

confidence: 99%

Determination of Kinetic and Thermodynamic Parameters of Biomass Gasification with TG-FTIR and Regression Model Fitting

Zsinka,

Tarcsay,

Miskolczi

2024

Energies

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In this study, the decomposition of five different raw materials (maize, wheat and piney biomass, industrial wood chips and sunflower husk) were investigated using the TG-FTIR method to obtain raw data for model-based calculations. The data obtained from the thermogravimetric analysis served as a basis for kinetic analysis with three different isoconversional, model-free methods, which were the KAS, FWO and Friedman methods. Afterwards, the activation energy and the pre-exponential factor were determined, and no significant difference could be identified among the used methods (difference was under 5%), achieving 203–270 kJ/mol of Ea on average. Thereafter, the thermodynamic parameters were studied. Based on the TG-FTIR data, a logistic regression model was fitted to the data, which gives information about the thermal degradation and the obtained components with different heating rates. The FTIR analysis resulted in differential peaks corresponding to the studied components that were detected within the temperature range of 350–380 °C. The primary degradation processes occurred within a broader temperature range of 200–600 °C. Accordingly, in this work, the use of logistic mixture models as an alternative to traditional kinetic models for the description of the TGA process was also investigated, reaching adequate performance in fitting by a validation data coefficient of determination of R2 = 0.9988.

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Physicochemical characterisation and kinetic modelling of wet torrefied oil palm trunk in pyrolysis condition

Wang,

Phang,

Soh

et al. 2024

Asia-Pacific J Chem Eng

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Over 218 million tonnes of oil palm trunks (OPT) waste is produced annually by Malaysian oil palm industry, which can be converted to biofuels via wet torrefaction. This study assessed the fuel characteristics of wet torrefied OPT (WT‐OPT) using proximate analysis, higher heating value (HHV) analysis, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy–energy dispersive X–ray spectroscopy (SEM–EDX). Increasing wet torrefaction temperature and residence time increased the fixed carbon content and HHV of OPT. SEM–EDX revealed the presence of microspheres of 5‐hydroxymethylfurfural (5‐HMF) in OPT wet torrefied at 180 and 220°C for 72 h, an intermediate compound that can contribute to the HHV enhancement in WT‐OPT. FTIR and EDX results revealed that higher temperature and residence time concentrate the carbon content of OPT. Wet torrefaction at 180°C for 72 h decreased the activation energy and pre‐exponential factor of OPT from 301.88 to 171.70 kJ mol−1 and from 4.43 × 1028 to 3.25 × 1012 s−1, respectively, during pyrolysis. The estimated thermodynamic parameters, particularly the change in entropy which generally decreased by more than 140 J mol−1 K−1, indicated increase in stability of certain WT‐OPT.

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Kinetics and thermodynamics of non‐isothermal pyrolysis of Terminalia chebula branches at different heating rates

Cited by 7 publications

References 59 publications

Non‐isothermal Thermogravimetric Analysis of Peltophorum pterocarpum and Evaluation of Kinetic Triplet

Non‐isothermal Thermogravimetric Analysis of Peltophorum pterocarpum and Evaluation of Kinetic Triplet

Determination of Kinetic and Thermodynamic Parameters of Biomass Gasification with TG-FTIR and Regression Model Fitting

Physicochemical characterisation and kinetic modelling of wet torrefied oil palm trunk in pyrolysis condition

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