Torrefaction of cellulose, hemicelluloses and lignin extracted from woody and agricultural biomass in TGA-GC/MS: Linking production profiles of volatile species to biomass type and macromolecular composition

Couce, Andrés Anca; Dupont, Capucine; Perez, Denilson da Silva; Thiéry, Sébastien; Meyer, A.; Gourdon, Christophe

doi:10.1016/j.indcrop.2021.114350

Cited by 41 publications

(23 citation statements)

References 79 publications

(190 reference statements)

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“…The emission of acetic acid and furfural in this thermal window confirmed the thermal degradation of cellulose and hemicellulose, as reported in previous studies [38,39]. In particular, acetic acid formation is related to the elimination of O-acetyl groups linked to the main xylan chain, while furfural formation is linked to the dehydroxymethylation of the furan ring side chain in 5-hydroxymethylfurfural, an organic compound formed by the dehydration of reducing sugars [38,39]. The shape of the peaks is determined by the constituent that degrades within the specific thermal window [40].…”

Section: Region Thermal Window Thermally Activated Processes Mass Los...supporting

confidence: 89%

“…Region III, spanning from ~210 • C to ~415 • C, constitutes the principal pyrolysis window, where structural decay reactions of proteins (~240 • C), hemicellulose (250-300 • C), cellulose (300-380 • C), and lignin (300-500 • C) occur. The emission of acetic acid and furfural in this thermal window confirmed the thermal degradation of cellulose and hemicellulose, as reported in previous studies [38,39]. In particular, acetic acid formation is related to the elimination of O-acetyl groups linked to the main xylan chain, while furfural formation is linked to the dehydroxymethylation of the furan ring side chain in 5-hydroxymethylfurfural, an organic compound formed by the dehydration of reducing sugars [38,39].…”

Section: Region Thermal Window Thermally Activated Processes Mass Los...supporting

confidence: 87%

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Exploring Olive Pit Powder as a Filler for Enhanced Thermal Insulation in Epoxy Mortars to Increase Sustainability in Building Construction

D’Eusanio,

Marchetti,

Pastorelli

et al. 2024

AppliedChem

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This article explores the use of olive pit powder (OPP) as a promising resource for enhancing the thermal insulation properties of epoxy mortars. A comprehensive analysis of the chemical and physical characteristics of OPP was conducted, employing analytical techniques including scanning electron microscopy (SEM), thermogravimetric analysis and emitted gas analysis (TG-MS-EGA), and proximal analysis. Experimental samples of epoxy grout were prepared by using different proportions of a conventional inorganic filler, quartz powder, and OPP within an epoxy mortar matrix. As the percentage of OPP in the formulation increased, the microstructure of the samples gradually became more porous and less compact. Consequently, there was a decrease in density with the increase in OPP content. The 28-day compressive strength decreased from 46 MPa to 12.8 MPa, respectively, in the samples containing only quartz (Sample E) and only OPP (Sample A) as a filler. Similarly, flexural strength decreased from 35.2 to 5.3 MPa. The thermal conductivity decreased from 0.3 W/mK in Sample E to 0.11 in Sample A. Therefore, increasing the %wt of OPP improved insulating properties while reducing the mechanical resistance values. This study highlights the potential of OPP as an environmentally friendly and thermally efficient filler for epoxy mortars, thereby promoting sustainable construction practices.

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Section: Region Thermal Window Thermally Activated Processes Mass Los...supporting

confidence: 89%

Section: Region Thermal Window Thermally Activated Processes Mass Los...supporting

confidence: 87%

Exploring Olive Pit Powder as a Filler for Enhanced Thermal Insulation in Epoxy Mortars to Increase Sustainability in Building Construction

D’Eusanio,

Marchetti,

Pastorelli

et al. 2024

AppliedChem

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“…The main mechanisms involved in biomass torrefaction are dehydration and decarboxylation 39 . Hemicellulose, which contains abundant hydroxyl groups, undergoes degradation during torrefaction through dehydration and the breaking of weak linkages between small substituents and the main polymer chains 40 . Generally, due to its lower thermal stability compared to cellulose and lignin 41 , hemicellulose decomposition prevails at lower temperatures, such as in torrefaction.…”

Section: Resultsmentioning

confidence: 99%

Van Krevelen diagrams based on machine learning visualize feedstock-product relationships in thermal conversion processes

Wang,

Shi

et al. 2023

Commun Chem

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Feedstock properties play a crucial role in thermal conversion processes, where understanding the influence of these properties on treatment performance is essential for optimizing both feedstock selection and the overall process. In this study, a series of van Krevelen diagrams were generated to illustrate the impact of H/C and O/C ratios of feedstock on the products obtained from six commonly used thermal conversion techniques: torrefaction, hydrothermal carbonization, hydrothermal liquefaction, hydrothermal gasification, pyrolysis, and gasification. Machine learning methods were employed, utilizing data, methods, and results from corresponding studies in this field. Furthermore, the reliability of the constructed van Krevelen diagrams was analyzed to assess their dependability. The van Krevelen diagrams developed in this work systematically provide visual representations of the relationships between feedstock and products in thermal conversion processes, thereby aiding in optimizing the selection of feedstock and the choice of thermal conversion technique.

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“…Moreover, lignin is an aromatic polymer and decomposes over a wide temperature range. 5,6 The thermochemical conversion of biomass to fuel depends on many factors, such as biomass characteristics and process parameters. Also, the conversion efficiency might decrease due to some inherent shortcomings of raw biomass, such as high moisture content and hygroscopicity and low energy density.…”

Section: Introductionmentioning

confidence: 99%

“…Cellulose is a glucose polymer which experiences the initial and major degradations in the temperature ranges of around 200–250 and 300–400 °C, respectively. Moreover, lignin is an aromatic polymer and decomposes over a wide temperature range. , …”

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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Torrefaction of cellulose, hemicelluloses and lignin extracted from woody and agricultural biomass in TGA-GC/MS: Linking production profiles of volatile species to biomass type and macromolecular composition

Cited by 41 publications

References 79 publications

Exploring Olive Pit Powder as a Filler for Enhanced Thermal Insulation in Epoxy Mortars to Increase Sustainability in Building Construction

Exploring Olive Pit Powder as a Filler for Enhanced Thermal Insulation in Epoxy Mortars to Increase Sustainability in Building Construction

Van Krevelen diagrams based on machine learning visualize feedstock-product relationships in thermal conversion processes

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

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