Combustion properties and kinetics of different biomass samples using TG–MS technique

Jayaraman, Kandasamy; Kök, Mustafa Verşan; Gökalp, I.

doi:10.1007/s10973-016-6042-1

Cited by 68 publications

(30 citation statements)

References 25 publications

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“…To identify the combustion characteristics of the foams, some parameters derived from TG-DTG curves were used to define their thermal behavior, such as T i (initial temperature) representing the reaction initiation temperature; T f (final or burnout temperature) being the temperature at which the reaction was complete and the mass loss remains nearly constant; T max being the temperature where maximum mass loss occurs; maximum weight loss rate (DTG max ) and its corresponding temperature (T max ); and mean weight loss rate (DTG mean ) [35]. All these parameters are recorded in Table 3.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Characterization and Preparation of Furanic-Glyoxal Foams

Pizzi

Lei

et al. 2020

Polymers

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Synthetic foams have become an essential industrial product for a great variety of applications. Furfuryl alcohol, as a biomass chemical, was reacted with glyoxal at room temperature to prepare furanic-glyoxal rigid foams, and p-toluenesulfonic acid was used as a catalyst to initiate the reaction. Foams with different molar ratios (furfuryl alcohol/glyoxal) were prepared in this work, and uniform cells foams have been obtained. Their compression resistance, 24-h water absorption, density, and other basic properties were tested. Scanning electron microscopy (SEM) was used to observe the cellular morphology of the foams prepared, thermogravimetric analysis (TGA) helped to understand their thermal and combustion properties, and FTIR and Matrix Assisted Laser Desorption Ionisation Time of Flight (MALDI ToF) mass spectroscopy to explain the structure of the resulting foams to clarify the reactions occurring during foaming. The results show that the compression resistance of furanic-glyoxal foams declined as the furfuryl alcohol/glyoxal ratio decreases also. SEM observations revealed that foams with open-cell were obtained when furfuryl alcohol was added in greater amounts, and more closed cell structures were formed as the proportion of glyoxal increased. TGA results showed that the initial ignition temperature of furanic-glyoxal foams is ~200 °C higher than that of wood, and the smaller comprehensive combustion index S (about 0.15 × 10−7 (%2 K−3 min−2)) indicates that the foam burns slowly and has poor flammability, that is, it is not easy to burn.

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Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Characterization and Preparation of Furanic-Glyoxal Foams

Pizzi

Lei

et al. 2020

Polymers

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“…La técnica simultánea de análisis termogravimétrico-espectrometría de masas, TG-MS, cumple con estos requerimientos. Ciertamente, esta combinación ha sido identificada como una de las herramientas más versátiles y eficientes para este tipo de estudios [10], [11], [12]. El análisis termogravimétrico permite estimar los parámetros cinéticos del proceso, mientras que la espectrometría de masas permite identificar la evolución de los productos en función del tiempo y la temperatura.…”

Section: Revisión Literariaunclassified

“…El control y adquisición de datos de la balanza y del espectró-metro de masas se implementó con los programas Universal Analysis y Quadstar, respectivamente. Se usaron programas de calentamiento lineal (10,30, 50 y 100 K/min) y un programa de calentamiento usando procesos de calentamiento lineal intercalados con procesos isotérmicos (programa tipo escalera). En todos los experimentos se usó helio de ultra alta pureza (grado 5) como atmósfera inerte y gas de purga.…”

Section: Análisis De Gases Desprendidosunclassified

Evolved gas analysis of cassava (Manihot esculenta) industrial waste

et al. 2018

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ResumenIntroducción− La pirólisis de residuos agroindustriales es una alternativa para generar combustibles líquidos de segunda generación. Objetivo− Determinar la cinética de la pirólisis de residuos industriales de yuca y de formación de productos. Metodología− Se estudió la pirólisis de residuos provenientes de la industria del almidón de yuca utilizando termogravimetría acoplada a espectrometría de masas. Los datos termogravimétricos fueron ajustados al modelo cinético de distribución de energías de activación, siendo necesario el uso de solo un pseudocomponente. Resultados− La pirólisis de las muestras calentadas a velocidades inferiores a 30 K/min mostró valores de los paráme-tros cinéticos diferentes a los de la pirólisis de las muestras calentadas a velocidades superiores a 50 K/min, lo cual sugiere un cambio de mecanismo con la velocidad de calentamiento. Los valores obtenidos de los parámetros cinéticos de la pirólisis de los residuos estudiados se encuentran en el rango reportado por la literatura para otros tipos de biomasa. Se identificaron 23 relaciones m/z en los gases desprendidos de la muestra con suficiente relación señal/ruido. Las señales de espectrometría de masas seleccionadas fueron ajustadas con el modelo DAEM utilizando los parámetros cinéticos obtenidos con los datos termogravimétricos. Conclusiones− Se lograron buenos resultados de ajuste con el modelo DAEM de un solo pseudocomponente para la mayoría de las relaciones m/z. La falta de ajuste para algunas relaciones m/z se puede atribuir a reacciones secundarias en fase gaseosa. Palabras clave− Análisis termogravimétrico; cinética; espectrometría de masas; pirólisis; biomasa Abstract Introduction− The pyrolysis of agro-industrial waste is an alternative to produce second generation liquid fuels. Objective−Determine the kinetics in the pyrolysis process of cassava industrial waste as well as of evolved product formation. Methodology− Pyrolysis of waste from cassava starch processing was studied via thermogravimetric analysis coupled to mass spectrometry. Thermogravimetric data were adjusted to the distributed activation energy model with one pseudocomponent. Results− Pyrolysis of samples heated at ramps below 30 K/min showed kinetics parameters with different values from the ones obtained for the samples heated at ramps above 50 K/min. This suggests a change in the pyrolysis reaction mechanism linked to heating rate. The kinetics parameters obtained in this work are in agreement with values reported for other biomass in literature. From the evolved gases, 23 m/z signals were identified with enough signal/noise ratio. Mass spectrometry signals were also adjusted with the distributed activation energy model using the kinetics parameters obtained from thermogravimetric data. Conclusions− Satisfactory results were achieved with the DAEM model with one pseudocomponent for most of m/z ratio. The lack of adjustment in some m/z ratio can be attributed to secondary reactions in the gas phase. Keywords− Thermogravimetric analysis; kinetics; mass s...

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“…Thermogravimetric analysis (TGA) was selected for the thermal decomposition process [11][12][13].The kinetic data obtained from TGA are very useful in helpingus understand the thermal degradation processes and mechanisms;these data also may be used as input parameters for a thermaldegradation reaction model [14,15].Many studies have been published on the pyrolysis characteristics and kinetics of macroalgae [16][17][18][19][20]. Anastasakis et al [16]performed a pyrolysis behavior study of the main carbohydrates of brown macroalgae, and Py-GC/MS results showed that each of the model compounds produced a " Popescu, FWO and KAS methods were adopted todetermine the kinetic parameters of the reaction.…”

Section: Introductionmentioning

confidence: 99%

Thermochemical behaviour of Algal Waste: Kinetics and Mechanism of the Pyrolysis

Aboulkas¹

2018

ETJ

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The present work assesses a possible process for treating algal wastes in an environmentally friendly way. It is based on the pyrolysis of these wastes for energetic valorization in order to evaluate its bioenergy potential. Thepyrolytic and kinetic characteristics of algal waste as a model for algal biomass were evaluated and compared at heating rates of 5, 10,20 and50°C min -1 from 105 to900 °C in an inert atmosphere. The DTG curves showed three distinct stages of degradation; dehydration, devolatilization and residual decomposition. The kinetic analysis was established by the isoconversional methods of Friedman (FR), Flynn-Wall-Ozawa (FWO) and Vyazovkin (VYA) methods) to estimate activation energy, the master-plot methods were introduced to establish kinetic models. Activation energy values were shown to be 192.55, 183.26 and 185.45 kJ mol -1 as calculated by FR, FWO and VYA methods, respectively. The devolatilization stage of algal waste could be described by the Avramic-Erofeev equation (n = 3). It is shown that the isoconversional kinetic methods provide the reliable kinetic information suitable for adequately choosing the kinetic model which best describes the thermal decomposition of algal waste. The composite differential method was used to obtain the following kinetic triplet:

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Combustion properties and kinetics of different biomass samples using TG–MS technique

Cited by 68 publications

References 25 publications

Characterization and Preparation of Furanic-Glyoxal Foams

Characterization and Preparation of Furanic-Glyoxal Foams

Evolved gas analysis of cassava (Manihot esculenta) industrial waste

Thermochemical behaviour of Algal Waste: Kinetics and Mechanism of the Pyrolysis

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