The isothermal degradation of wood

Maryandyshev, Pavel; Chernov, Aleksandr; Попова, Е. И.; Есеев, М. К.; Lyubov, V. K.

doi:10.3103/s0361521916060069

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…These biomass feedstocks provide different biochemical structures, which are decomposed at different temperatures through pyrolysis and torrefaction processes. WW consists of hemicellulose (23-26 wt%), cellulose (48-56 wt%), and lignin (26-30 wt%) structures [108]. The thermal decomposition of hemicellulosic, cellulosic, and lignin structures are between 200 and 315 • C, 280-400 • C, and 160-900 • C, respectively, [17,85,107].…”

Section: Thermal Conversion Of Biomass Feedstocksmentioning

confidence: 99%

“…3c), WW demonstrated the highest decomposition via the torrefaction process, as char yield was ~ 87 wt% at 220 • C and decreased to ~ 35 wt% at 280 • C, which could be attributed to the thermal decomposition of hemicellulose [112] and cellulose structures. As thermal decomposition of the hemicellulosic structure in WW begins at ~ 200 • C, where the partial hydrolysis of glycosidic linkages, the decarboxylation of side chains, and the exothermic condensation of molecules occur [108]. The β-glycosidic bonds rupture at ~ 220 • C. At a temperature between 220 and 280 • C, active disintegration occurs via condensation, oxidation, and polymerization reactions [108].…”

Section: Thermal Conversion Of Biomass Feedstocksmentioning

confidence: 99%

“…As thermal decomposition of the hemicellulosic structure in WW begins at ~ 200 • C, where the partial hydrolysis of glycosidic linkages, the decarboxylation of side chains, and the exothermic condensation of molecules occur [108]. The β-glycosidic bonds rupture at ~ 220 • C. At a temperature between 220 and 280 • C, active disintegration occurs via condensation, oxidation, and polymerization reactions [108]. However, the low biochar yield of WW (35 wt%) at 280 • C is not only attributed to the decomposition of hemicellulose but also the decomposition of cellulose due to the long residence time of torrefaction (60 min).…”

Section: Thermal Conversion Of Biomass Feedstocksmentioning

confidence: 99%

See 2 more Smart Citations

A comprehensive comparative study on the energy application of chars produced from different biomass feedstocks via hydrothermal conversion, pyrolysis, and torrefaction

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Williams

Kostas

et al. 2022

Energy Conversion and Management

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Section: Thermal Conversion Of Biomass Feedstocksmentioning

confidence: 99%

Section: Thermal Conversion Of Biomass Feedstocksmentioning

confidence: 99%

Section: Thermal Conversion Of Biomass Feedstocksmentioning

confidence: 99%

See 1 more Smart Citation

A comprehensive comparative study on the energy application of chars produced from different biomass feedstocks via hydrothermal conversion, pyrolysis, and torrefaction

Güleç

Williams

Kostas

et al. 2022

Energy Conversion and Management

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“…Вміст даних компонентів в деревному біопаливі залежить від породи, умов росту і віку деревини. В середньому, в хвойних породах міститься 48…56 % целюлози, 26…30 % лігніну і 23…26 % геміцелюлози [4]. При термічній обробці біополімери перетерплюють різну ступінь розкладання, утворюючи леткі CO 2 , CO, H 2 , N 2 та C n H m (серед газоподібних вуглеводнів основним є CH 4 ), пару пірогенетичної води, кислоти та смоли, що при нормальних умовах формують рідку фракцію та твердий вугільний залишок.…”

Section: вступunclassified

Thermal Analysis of Granular Biofuel Torified in the Atmosphere of Its Own Gaseous Environment

Mykhailyk

Korinchevska

Korinchuk

et al. 2019

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The article substantiates the need to study the torrefaction of fuel from biomass in the atmosphere of its own gaseous medium formed during the thermal decomposition of organic substances. The methodology, equipment and devices for heat treatment of pine wood pellets are given. The results of a study using the TGA and DTA methods of the degree of thermal decomposition, equilibrium humidity, ash content and specific heat of thermal decomposition of torrefied at 250, 270 and 290 °С and the initial biofuel are presented. It is shown that an increase in the heat treatment temperature leads to an increase in the degree and temperature range of fuel decomposition, an increase in the specific heat of thermal decomposition, a decrease in hydrophilicity, and an increase in ash content. The degree of decomposition of torrefied biofuel with an increase in the treatment temperature within the indicated limits decreased from 7.81 to 4.89%, which indicates an insignificant balance of hemicellulose. Heat treatment caused an increase in hydrophobicity, which manifested itself in a 2.8-fold decrease in the equilibrium moisture content of biofuel torrefied at 290 °С. Due to the invariability of the mineral composition and the decrease in dry weight, the ash content in torrefied fuel is higher than in the original. The specific heat of thermal decomposition of biofuel torrefied at 290°С increased by 65.4% compared to the initial one. The study of the method of torrefaction of biofuels at atmospheric pressure in a gaseous environment formed in a confined space during the thermal decomposition of organic substances, showed its effectiveness and the possibility of using it for heat treatment of biomass without the use of inert gases.

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“…1 b. The thermal analysis was carried out under the following conditions, corresponding to the experiments [11]: the sample mass was 25 mg; heating from 300 K to 1270 K at a rate of 10 K/min in argon and oxygen with a gas flow rate of 100 ml/min. The kinetic parameters of pyrolysis were calculated by the method [12].…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Determination of thermophysical and thermokinetic characteristics of forest combustible materials

2018

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Abstract. The danger of forest fires and their large-scale consequences is facing humanity more and more sharply from year to year. We carried out experimental studies to determine the thermal characteristics (thermal conductivity, heat capacity, thermal diffusivity) and thermokinetic characteristics (activation energy, pre-exponential factor) of typical forest combustible materials and their mixtures for a wide range of temperatures (298-423 K). A generalization of experiments for typical forest combustible materials of the Far Eastern Federal District of Russia was performed. The established experimental values can be used for mathematical modeling of occurrence, propagation and extinguishing of forest fires.

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The isothermal degradation of wood

Cited by 9 publications

References 6 publications

A comprehensive comparative study on the energy application of chars produced from different biomass feedstocks via hydrothermal conversion, pyrolysis, and torrefaction

A comprehensive comparative study on the energy application of chars produced from different biomass feedstocks via hydrothermal conversion, pyrolysis, and torrefaction

Thermal Analysis of Granular Biofuel Torified in the Atmosphere of Its Own Gaseous Environment

Determination of thermophysical and thermokinetic characteristics of forest combustible materials

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