Kinetic, thermodynamic, FT-IR, and primary constitution analysis of Sargassum spp from Mexico: Potential for hydrogen generation

Flores, José Juan Alvarado; Vera, Jorge Víctor Alcaráz; Rodríguez, María Liliana Ávalos; Quiñones, José Guadalupe Rutiaga; Valencia, Jaime Espino; Guevara-Martínez, Santiago José; Aguado, Roberto

doi:10.1016/j.ijhydene.2022.05.051

Cited by 10 publications

(13 citation statements)

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“…Mathematical models for the determination of kinetic parameters. [30]. Iso-conversional models, such as Friedman, FWO, KAS, and Starink-Popescu, make it possible to predict the Ea as a function of the degree of mass conversion (α), independently of the multiple temperature programs utilized to obtain data on the heating speed (β) at a constant degree of conversion.…”

Section: Classification Of Kinetic Modelsmentioning

confidence: 99%

“…The aim of that work was to characterize the thermal degradation of this biomass and evaluate its potential as an energy source using TGA carried out in a nitrogen/air atmosphere. Five heating speeds were used (10,20,30,40,50 • C min −1 ) and the kinetic parameters were determined using the KAS and FWO models. Results showed that the average activation energies (Ea) determined by the two models in the inert atmosphere were 74.74 and 80.74 kJ mol −1 , respectively, while the values under combustion conditions were 51.08 and 58.91 kJ mol −1 .…”

Section: Kinetics Of Lignocellulosic Materialsmentioning

confidence: 99%

“…Agricultural biomass from peas was analyzed to determine its potential to produce bioenergy through pyrolysis. Experiments were carried out in a TG/DSC-FT-IR (4000-400 cm −1 ) in an inert N 2 atmosphere at ambient temperatures as high as 800 • C, using four heating speeds (10,20,30,40 • C/min). The kinetic parameters were calculated using the KAS, FWO, Starink, and Vyazovkin models.…”

Section: Kinetics Of Lignocellulosic Materialsmentioning

confidence: 99%

“…It is important then to conduct research to determine their behavior in thermal conditions and their kinetic and thermodynamic properties during pyrolysis. One such study was carried out in a nitrogen atmosphere (20 mL/min) at three heating speeds (10,20,30 • C/min) from ambient temperature to 900 • C. That procedure was used to determine the kinetic parameters (Ea, A) and R 2 using five models: KAS, FWO, Starink, Friedman, and Kissinger. For the first four models, the average Ea values obtained were 79.36, 84.02, 92.12, and 73.89 kJ/mol, respectively.…”

Section: Kinetics Of the Shell-peel Of Lignocellulosic Biomassmentioning

confidence: 99%

“…It used Friedman's method to evaluate Ea, which was considered when the value of the degree of advance was less than 0.75. This required six heating speeds (5,10,20,30,40,50 • C/min). That study also compared a kinetic model to the experimental model to demonstrate that thermal degradation was governed by a complex process, which was further proven by a differential thermogravimetric analysis (DTG) that observed two main exothermic peaks which corresponded to carbohydrates and lipids.…”

Section: Kinetics Of Marine And/or Aquatic Biomassmentioning

confidence: 99%

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Analysis of Pyrolysis Kinetic Parameters Based on Various Mathematical Models for More than Twenty Different Biomasses: A Review

et al. 2022

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Today, energy use is an important and urgent issue for economic development worldwide. It is expected that raw material in the form of biomass and lignocellulosic residues will become increasingly significant sources of sustainable energy in the future because they contain components such as cellulose, hemicellulose, lignin, and extractables with high energy-producing potential. It is then essential to determine the behavior of these materials during thermal degradation processes, such as pyrolysis (total or partial absence of air/oxygen). Pyrolyzed biomass and its residual fractions can be processed to produce important chemical products, such as hydrogen gas (H2). Thermogravimetric (TGA) analysis and its derivative, DTG, are analytical techniques used to determine weight loss as a function of temperature or time and associate changes with certain degradation and mass conversion processes in order to evaluate kinetic properties. Applying kinetic methods (mathematical models) to degradation processes permits obtaining several useful parameters for predicting the behavior of biomass during pyrolysis. Current differential (Friedman) and integral (Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, Starink, Popescu) models vary in their range of heating speeds (β) and degree of advance (α), but some (e.g., Kissinger’s) do not consider the behavior of α. This article analyzes the results of numerous kinetic studies using pyrolysis and based on thermogravimetric processes involving over 20 distinct biomasses. The main goal of those studies was to generate products with high added value, such as bio-char, methane, hydrogen, and biodiesel. This broad review identifies models and determines the potential of lignocellulosic materials for generating bioenergy cleanly and sustainably.

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Section: Classification Of Kinetic Modelsmentioning

confidence: 99%