Kinetic study on pyrolysis and combustion of wood under different oxygen concentrations by using TG-FTIR analysis

Fang, Mengxiang; Shen, Dekui; Li, Y.X.; Yu, Cunjiang; Luo, Zhongyang; Cen, Ke Fa

doi:10.1016/j.jaap.2005.12.010

Cited by 216 publications

(110 citation statements)

References 11 publications

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“…Similarly, first stage of DTG curves is nearly overlapped while the peak temperature decreases and the temperature range of a whole weight loss peak narrows with the increase of oxygen concentration in second degradation stage. At the same time, in comparison with 10k/min,the peak temperature are higher and the peak range are wider at the heating rate of 20k/min,which is corresponding with the conclude of M.X.Fang [6].This phenomenon can be explained by thermal hysteresis quality under different heating rates, time of receiving heat is more adequate with the lower heating rate, then both of the initial and terminated temperature move toward lower direction. …”

Section: A Pyrolysis Characteristic Analysismentioning

confidence: 53%

Kinetic Study on Pyrolysis of Polyphenylene Sulfide under Different Oxygen Concentrations

Teng¹,

Mao²,

Liu³

et al. 2015

Proceedings of the International Conference on Chemical, Material and Food Engineering

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Section: A Pyrolysis Characteristic Analysismentioning

confidence: 53%

Kinetic Study on Pyrolysis of Polyphenylene Sulfide under Different Oxygen Concentrations

Teng¹,

Mao²,

Liu³

et al. 2015

Proceedings of the International Conference on Chemical, Material and Food Engineering

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“…This stage corresponds to the homogeneous combustion of released gases by the decomposition of lignin and heterogeneous combustion of solid carbon (MAGDZIARZ;WILK, 2013;MOON et al, 2013;KAI et al, 2011;FANG et al, 2006). Therefore, in this phase the mass loss was lower than the previous stage, corresponding to 25.79%.…”

Section: Fresh Biomassmentioning

confidence: 97%

Combustion of Biomass and Charcoal Made From Babassu Nutshell

Protásio

Guimarães

Mirmehdi

et al. 2017

CERNE

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ABSTRACT:In recent years, studies have examined the use of lignocellulosic wastes for energy generation. However, there is a lack of information on the combustibility of the residual biomass, especially the bark and charcoal of babassu nut. In this study, thermogravimetric analysis (TGA), differential thermal analysis (DTA) and differential scanning calorimetry (DSC) were used to achieve the following objectives: to evaluate the combustion of the residual biomass from the babassu nut; to evaluate the combustion of charcoal produced from this biomass, considering different final carbonization temperatures; and to determine the effect of the final carbonization temperature on the thermal stability of charcoal and on its performance in combustion. Thermal analyses were performed in synthetic air. In order to evaluate the characteristics of charcoal combustion and fresh biomass, the ignition temperature (T i ), the burnout temperature (T f ), characteristic combustion index (S), ignition index (D i ), time corresponding to the maximum combustion rate (t p ), and ignition time (t ig ) were considered. The combustion of the babassu nutshell occurred in three phases and it was observed that this lignocellulosic material is suitable for the direct generation of heat. The increase in the final carbonization temperature caused an increase in the ignition temperature, as well as in the burnout temperature, the ignition time and the time corresponding to the maximum combustion rate. The results indicate that the increase in the carbonization temperature causes a decrease in combustion reactivity and, consequently, the charcoals produced at lower temperatures are easier to ignite and exhibit better performance in ignition.COMBUSTÃO DA BIOMASSA E DO CARVÃO VEGETAL DA CASCA DO COCO BABAÇU RESUMO: Nos últimos anos, pesquisadores têm analisado o uso de resíduos lignocelulósicos para geração de energia. No entanto, há uma falta de informação sobre a combustibilidade da biomassa residual, especialmente a casca e o carvão vegetal do coco babaçu. Neste estudo foram utilizadas as análises termogravimétricas (TGA), térmica diferencial (DTA) e de calorimetria exploratória diferencial (DSC) para: avaliar a combustão da biomassa residual do coco babaçu; avaliar a combustão do carvão vegetal produzido a partir dessa biomassa, considerando diferentes temperaturas finais de carbonização; e verificar o efeito da temperatura final de carbonização na estabilidade térmica do carvão vegetal e no seu desempenho na combustão. As análises térmicas foram realizadas em atmosfera de ar sintético. Para avaliar as características da combustão do carvão vegetal e da biomassa in natura foi considerada a temperatura de ignição (Ti), a temperatura final da combustão (Tf), o índice característico da combustão (S), o índice de ignição (Di), o tempo correspondente à máxima taxa de combustão (tp) e o tempo de ignição (tig). A combustão da casca do coco babaçu ocorreu em três fases distintas e observou-se que esse material lignocelulósico apresenta aptidão para ...

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“…In general, DTG curves obtained from the thermal degradation of wood in an inert atmosphere do not yield a peak due to the thermal degradation of lignin. In contrast, DTG curves obtained from the thermal degradation of wood in an oxygen environment generally yield a peak due to the thermal degradation of lignin (Chauvette et al, 1985;Cordero et al, 1991;Orfao et al, 1999;Fang et al, 2006;Emandi et al, 2011;Niu et al, 2011).…”

Section: Solubility Of Heartwood Of L Orientalismentioning

confidence: 99%

Ekstraksiyon işlemleri öncesi ve sonrası Liquidambar orientalis mill. odununun termal davranışı

Terzi¹

2017

İstanbul Üniversitesi Orman Fakültesi Dergisi

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The effect of extractives on the thermal behavior of Liquidambar orientalis Mill. (storax) wood is studied using thermogravimetric analysis (TGA). To evaluate the effects of polar and apolar extractives on the thermal behavior of wood, sawdust samples from the heartwood of L. orientalis are extracted with either cold water (48 h), hot water (48 h), or ethanol/toluene (1:2 v/v) (6 h) prior to thermal analysis. Thermogravimetry (TG) curves show that polar and apolar extractives promote char formation, increase the amount of residue, and improve the thermal behavior of L. orientalis wood. In addition, derivative thermogravimetry (DTG) curves demonstrate that thermal degradation of unextracted and cold water-extracted wood samples occurs in a single step, while a two-step degradation pattern is seen for hot water-and ethanol/toluene-extracted wood samples. It is also observed that first degradation reactions in hot water and ethanol/toluene-extracted wood samples occur faster than those in unextracted and cold water-extracted wood samples. Although there are approximately half the number of extracted apolar compounds compared to polar compounds, the removal of both types of compounds affect the thermal properties of L. orientalis wood to the same degree. It is thus deduced that apolar extractives significantly affect the thermal behavior of L. orientalis wood. Keywords: Wood extractives, thermogravimetric analysis, Liquidambar orientalis, storax wood, thermal degradation, natural fire retardants Ekstraksiyon işlemleri öncesi ve sonrası Liquidambar orientalis mill. odununun termal davranışıÖzet: Liquidambar orientalis Mill. odununun termal davranışı üzerine ekstraktif maddelerin etkisi termogravimetrik analiz (TGA) yöntemiyle incelenmiştir. L. orientalis öz odunundan elde edilen öğütülmüş odun unu örnekleri termal analizler öncesinde polar ve apolar ekstraktiflerin odunun termal davranışı üzerine etkisinin araştırılması amacıyla soğuk su (48 s), sıcak su (48 s) ve etanol/toluen (1:2 v/v) (6 s) ekstraksiyonlarına tabi tutulmuştur. Termogravimetri (TG) eğrileri polar ve apolar ekstraktiflerin kömürleşmiş tabaka oluşumunu desteklediğini, kalıntı madde miktarını artırdığını ve L. orientalis odunun termal davranışını iyileştirdiğini göstermiştir. Türevsel termogravimetri (DTG) eğrileri ise ekstraksiyon işlemi uygulanmamış ve soğuk su ile ekstraksiyonuna tabi tutulmuş odun unu örneklerinde termal bozulmanın tek aşamada gerçekleşirken sıcak su ve etanol/toluen ekstraksiyonuna tabi tutulmuş örneklerde termal bozulmanın iki aşamada gerçekleştiği tespit edilmiştir. Ayrıca, sıcak su ve etanol/toluen ekstraksiyonuna tabi tutulmuş örneklerde ilk termal bozulma reaksiyonlarının ekstraksiyon işlemi uygulanmamış ve soğuk su ile ekstraksiyonuna tabi tutulmuş odun unu örneklerine göre daha hızlı olduğu tespit edilmiştir. Ekstrakte edilen apolar bileşiklerin miktarı polar bileşiklerin yaklaşık yarısı kadar olmasına rağmen apolar bileşiklerin ekstraksiyonunun L. orientalis odununun termal özellikleri üzerine polar bileşikler i...

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Kinetic study on pyrolysis and combustion of wood under different oxygen concentrations by using TG-FTIR analysis

Cited by 216 publications

References 11 publications

Kinetic Study on Pyrolysis of Polyphenylene Sulfide under Different Oxygen Concentrations

Kinetic Study on Pyrolysis of Polyphenylene Sulfide under Different Oxygen Concentrations

Combustion of Biomass and Charcoal Made From Babassu Nutshell

Ekstraksiyon işlemleri öncesi ve sonrası Liquidambar orientalis mill. odununun termal davranışı

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