Investigating pyrolysis characteristics of moso bamboo through TG-FTIR and Py-GC/MS

Fang, Liang; Wang, Ruijuan; Xiang, Hongzhong; Yang, Xiaomeng; Zhang, Tao; Hu, Wanhe; Mi, Bingbing; Liu, Zhijia

doi:10.1016/j.biortech.2018.01.140

Cited by 138 publications

(49 citation statements)

References 28 publications

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“…As shown in the TG and DTG curves of the CB group (shown in Fig. 3a), the declining slope of the mass loss was incompatible at different heating rates, which indicated that the reaction rates of the samples varied at different heating rates (Liang et al 2018). Figure 3b showed that TG curve of the BB had a similar trend to the DTG curve at different heating rates, especially in the temperature range of 330 K to 370 K, for which the TG curve slowly decreased until the sample reached an oven-dry state.…”

Section: Pyrolysis Characteristicsmentioning

confidence: 92%

Pyrolysis and combustion characteristics of boric acid and borax treated decorative bamboo filaments

et al. 2020

BioRes

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A cone calorimeter and thermogravimetric analysis were used in this work to determine the combustion and pyrolysis characteristics of decorative bamboo filaments before and after being treated with boric acid and borax (1:1) flame-retardants. The kinetics were calculated using the Coates-Redfern model. The results showed that in comparison to the control sample, the flame combustion time decreased from 52 s to 40 s, and the peak value of the heat release rate (PKHRR) and total heat release (THR) of the boric acid and borax treated samples were significantly decreased, by 21.0% and 22.2%, respectively. The peak value of the smoke release rate (PKSPR), total smoke production (TSP), and the specific extinction area (ASEA) were reduced substantially, by 90.6%, 93.3%, and 93.0%, respectively. After the boric acid and borax (1 to 1 ratio) flame retardant treatment, the pyrolysis range, the mass loss, the maximum mass loss rate, and the corresponding peak temperature of the samples all significantly decreased with the same heating rate. The activation energy of the BB-treated samples was higher than the control group, which indicated the boric acid and borax flame retardant had flame retardant efficiency.

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Section: Pyrolysis Characteristicsmentioning

confidence: 92%

Pyrolysis and combustion characteristics of boric acid and borax treated decorative bamboo filaments

et al. 2020

BioRes

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“…With the temperature fixed at T max , the strongest characteristic absorbance can be obtained. Some possible compounds from FTIR characteristics absorbance bands, as summarized in Table 4 [33,34,35,36,37,38], were observed. Figure 3 shows the characteristics of absorbance of gaseous pyrolysis products of raw MDF at T max .…”

Section: Resultsmentioning

confidence: 99%

Evaluating the Effects of KCl on Thermal Behavior and Reaction Kinetics of Medium Density Fiberboard Pyrolysis

Pan

Jiang

2019

Materials

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The effects of potassium chloride (KCl) on the pyrolysis of medium density fiberboard (MDF) were investigated by using thermogravimetry/Fourier-transfer infrared spectroscopy (TG-FTIR). Five MDF samples treated with different KCl concentrations (0%, 0.5%, 1%, 2% and 3%) were heated with a heating rate of 20 °C/min. The thermogravimetry (TG) results showed that KCl caused the primary pyrolysis stage towards lower temperatures. The FTIR results indicated that with the concentrations of KCl, the formation of CH4 and C=O functional groups decreased while the formation of CO2 and CO increased. To figure out the reason for the observed phenomena, the kinetic parameters in primary pyrolysis and the secondary charring reaction were estimated by a differential evolution (DE) optimization algorithm. The prediction indicated that KCl shifted the initial degradation temperature of each component of MDF towards a lower temperature. Char and gas yields increased with the concentration of KCl, whereas the tar yield reduced. The changes in activation energies revealed that KCl played a catalyst role in the reaction of resin, hemicellulose and cellulose in primary pyrolysis. For lignin, KCl had little effect. In the secondary charring reaction, KCl apparently promoted the reaction of tar. The catalytic effect of KCl on MDF pyrolysis was the combination of primary pyrolysis and the secondary charring reaction. Finally, the optimal catalytic concentration for KCl on MDF pyrolysis was analyzed.

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“…[10] и Liang и соавт. [14] отмечают, что при температурах 180-200°С может также происходить термодеструкция углеводов и гемицеллюлоз. В диапазоне температур 170-220°С происходит гетеролитическое расщепление связей β-О-4 [12,13].…”

Section: результаты и обсуждениеunclassified

Influence of the extraction temperature on the properties and yield of ethanollignin from fir wood

Rudkovskiy¹,

al.²

2019

Tomsk State University Journal of Chemistry

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Влияние температуры органосольвентной варки на выход этаноллигнина из древесины пихты и его свойстваНа укрупненной лабораторной установке проведено исследование процесса экстракции лигнина из древесины пихты (Abies sibirica Ledeb) в диапазоне температур 180-220°С водными растворами этанола. Изучено влияние температуры варки и температуры разгрузки реактора, а также концентрации этанола на выход лигнина. Показано, что оптимальная температура варки 200°С позволяет получить высокие выходы лигнина при сохранении его морфологии. Температура варки существенно влияет не только на выход этаноллигнина, но и на его физико-химические свойства. Выполнен анализ этаноллигнинов, выделенных из древесины пихты при температурах 200 и 220°С методами ТГ-ДТА-ДСК и ГПХ. Установлено, что при 220°С и выше происходит изменение морфологии, термических свойств и молекулярно-массового распределения этаноллигнина. Этаноллигнин, выделенный из древесины при температуре 200°С, более термически стабилен по сравнению с лигнином, выделенным при температуре 220°С. Этаноллигнин, полученный при температуре 200°С, имеет среднюю молекулярную массу 1 781 Да и степень полидисперсности 2,49. Этаноллигнин, выделенный при температуре 220°С, имеет среднюю молекулярную массу 1 341 Да и степень полисдисперсности 2,22. Выход лигнина существенно зависит от температуры, при которой происходит разгрузка реактора и отделение экстракта от твердого остатка. При значении температуры разгрузки 20°С максимальный выход лигнина составлял 8,58 г на 100 г абсолютно сухой древесины. В случае когда температура разгрузки составляла 70°С, выход лигнина достигал 10,38 г. Максимальный выход этаноллигнина при температуре варки 200°С составляет 34,9 мас. % (10,34 г) от первоначального содержания лигнина в древесине пихты. Повышение температуры разгрузки реактора с 20 до 70°С позволяет значительно увеличить выходы лигнина. Лигнин, полученный в результате органосольвентной экстракции древесины пихты, может использоваться в качестве сырья в производстве полимеров или для получения ароматических соединений. Ключевые слова: этаноллигнин, пихта (Abies sibirica Ledeb), экстракция органическими растворителями, ТГ-ДТА-ДСК, ГПХ. ВведениеМетод экстракции лигнинов из древесины органическими растворителями различной природы при повышенных температурах известен как ор-

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Investigating pyrolysis characteristics of moso bamboo through TG-FTIR and Py-GC/MS

Cited by 138 publications

References 28 publications

Pyrolysis and combustion characteristics of boric acid and borax treated decorative bamboo filaments

Pyrolysis and combustion characteristics of boric acid and borax treated decorative bamboo filaments

Evaluating the Effects of KCl on Thermal Behavior and Reaction Kinetics of Medium Density Fiberboard Pyrolysis

Influence of the extraction temperature on the properties and yield of ethanollignin from fir wood

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