Cellulose, xylan and lignin interactions during pyrolysis of lignocellulosic biomass

Yu, Jie; Paterson, Nigel; Blamey, John; Millán, Marcos

doi:10.1016/j.fuel.2016.11.057

Cited by 330 publications

(141 citation statements)

References 36 publications

(40 reference statements)

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“…Pure lignin has a complex and branched structure compared to Energies 2018, 11, 2146 6 of 16 cellulose and hemicellulose. Also, significant interactions have been reported in the literature between cellulose and lignin during their pyrolysis [8,9], which can modify the global structure of char. The lignin combustion showed a different behavior compared to those previously, as shown in Figure 1e.…”

Section: Thermogravimetric and Differential Thermogravimetic (Dtg) Chmentioning

confidence: 99%

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Combustion of Flax Shives, Beech Wood, Pure Woody Pseudo-Components and Their Chars: A Thermal and Kinetic Study

et al. 2018

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Thermogravimetric analysis was employed to investigate the combustion characteristics of flax shives, beech wood, hemicellulose, cellulose, lignin, and their chars. The chars were prepared from raw materials in a fixed-bed reactor at 850 • C. In this study, the thermal behavior based on characteristic temperatures (ignition, maximum, and final temperatures), burnout time and maximum rate was investigated. The kinetic parameters for the combustion of different materials were determined based on the Coats-Redfern approach. The results of our study revealed that the combustion of pure pseudo-components behaved differently from that of biomass. Indeed, principal component analysis showed that the thermal behavior of both biomasses was generally similar to that of pure hemicellulose. However, pure cellulose and lignin showed different behaviors compared to flax shives, beech wood, and hemicellulose. Hemicellulose and cellulose chars had almost the same behaviors, while being different from biomass and lignin chars. Despite the difference between flax shives and beech wood, they showed almost the same thermal characteristics and apparent activation energies. Also, the combustion of the hemicellulose and cellulose chars showed that they have almost the same structure. Their overall thermal and kinetic behavior remained between that of biomass and lignin.

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Section: Thermogravimetric and Differential Thermogravimetic (Dtg) Chmentioning

confidence: 99%

“…The term 2RT/E a can be neglected (compared to 1 in this case) [37]. The E a was calculated from the slope of relation (8), while A was calculated from the y-intercept. Since this relation was supposed to be independent of the heating rate, the E a and A were calculated as average values based on the four heating rates.…”

Section: Kinetic Parametersmentioning

confidence: 99%

Combustion of Flax Shives, Beech Wood, Pure Woody Pseudo-Components and Their Chars: A Thermal and Kinetic Study

et al. 2018

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“…In fact, the absence of amylase activity is one important diagnostic feature of this genus of Actinobacteria. Cellulose, xylan, and lignin (lignocellulose) are the three primary constituents of plant biomass (Yu et al, 2017). These are the most abundant biopolymers in the planet, therefore, the main renewable resources that can be used to produce glucose and proteins, industrial fertilizer, biofuel, and compost (Ramírez and Calzadíaz, 2016).…”

Section: Amylase Activitymentioning

confidence: 99%

Research Article Characterization and phylogenetic affiliation of Actinobacteria from tropical soils with potential uses for agro-industrial processes.

Dornelas¹,

Figueiredo²,

Abreu³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Secondary metabolites produced by Actinobacteria of tropical soils represent a largely understudied source of novel molecules with relevant application in medicine, pharmaceutical and food industries, agriculture, and environmental bioremediation. The present study aimed to characterize sixty-nine Actinobacteria isolated from compost and tropical soils using morphological, biochemical, and molecular methods. All the isolates showed high variation for morphological traits considering the color of pigments of the aerial and vegetative mycelium and spore chain morphology. The enzymatic activity of amylase, cellulase, and lipase was highly variable. The amylase activity was detected in 53 (76.81%) isolates. Eighteen isolates showed enzymatic index (EI) > 4.0, and the isolates ACJ 45 (Streptomyces curacoi) and ACSL 6 (S. hygroscopicus) showed the highest EI values (6.44 and 6.42, respectively). The cellulase activity varied significantly (P ≤ 0.05) among the isolates. Twenty-nine isolates (42.02%) showed high cellulase activity, and the isolates ACJ 48 (S. chiangmaiensis) and ACJ 53 (S. cyslabdanicus) showed the highest EI values (6.56 for both isolates). The lipase activity varied statistically (P ≤ 0.05) with fourteen isolates (20.29%) considered good lipase producers (EI > 2.0). The isolate ACSL 6 (S. hygroscopicus) showed the highest EI value of 2.60. Molecular analysis of partial 16S rRNA gene sequencing revealed the existence of 49 species, being 38 species with only one representative member and 11 species represented by one or more strains. All species belonged to three genera, namely Streptomyces (82.61%), Amycolatopsis (7.25%), and Kitasatospora (10.14%). The present results showed the high biotechnological potential of different Actinobacteria from tropical soils.

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“…Como destacado por Bradfield e Levi (1984), Kaliyan e Morey (2009), Berghel et al (2013), Yu et al (2017), o teor de lignina e extrativos presente na biomassa é fundamental para a ligação interna e empacotamento das partículas durante o processo de peletização. Segundo Bradfield e Levi (1984), o conjunto lignina e extrativo promove o aumento da durabilidade dos pellets, pois os polímeros da madeira não cristalinos atuam como um adesivo entre as zonas cristalinas.…”

Section: Discussões Qualidade Dos Resíduos In Naturaunclassified

Utilização De Resíduos Da Cadeia Produtiva Do Pinhão Para a Produção De Pellets Para Geração De Energia

Jacinto

Brand

Cunha

et al. 2017

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ResumoEste trabalho teve como objetivo analisar a qualidade dos pellets produzidos a partir de diferentes misturas contendo madeira de Pinus e falhas de pinhão, com base nos critérios de qualidade da norma ISO 17225-2. Os materiais analisados in natura e utilizados para a produção dos pellets foram as escamas estéreis e não fertilizadas (falhas de pinhão) dos estróbilos femininos de Araucaria angustifolia, e a maravalha de Pinus spp. Os pellets foram compostos por: 100% de falha de pinhão (F100); 75% de falha e 25% de Pinus (F75P25); 50% de cada tipo de biomassa (F50P50); 25% de falha e 75% de Pinus (F25P75) e 100% de Pinus (P100). Foram analisadas as propriedades físicas, químicas e energéticas da biomassa in natura e as propriedades físicas, mecânicas e energéticas dos pellets produzidos com as misturas de biomassa. Os pellets foram classificados segundo as categorias de qualidade da norma ISO 17225-2. Os resultados demonstraram que as variações nas propriedades da biomassa in natura influenciam na qualidade dos pellets. A inclusão do Pinus reduziu a densidade a granel das misturas antes da peletização, o teor de carbono fixo, o teor de cinzas, o comprimento e a durabilidade dos pellets. Por outro lado, a inclusão do Pinus aumentou o poder calorífico superior, o teor de voláteis e o diâmetro dos pellets. Os tratamentos F75P25 e o F25P75 foram os pellets de melhor qualidade energética. Com base na norma ISO 17225-2, os pellets produzidos com misturas de Pinus e falhas de pinhão tem qualidade para uso industrial. Palavras-chave: Araucaria angustifólia; falha de pinhão; Pinus; norma ISO 17225. Abstract Use of waste from the production chain of pinion for the production of pellets for energy generation.This work aimed to analyze the quality of pellets produced from different mixtures containing Pinus wood and pinion failure, based on the quality criteria of ISO 17225-2. The materials analyzed in natura and used for the production of the pellets were the failure of the pine tree of Araucaria angustifolia, and the shavings of Pinus spp. The pellets were composed of: 100% pinion failure (F100); 75% failure and 25% Pinus (F75P25); 50% of each type of biomass (F50P50); 25% failure and 75% Pinus (F25P75) and 100% Pinus (P100). The physical, chemical and energetic properties of the in natura biomass and the physical, mechanical and energetic properties of the pellets produced with the different biomass mixtures were analyzed. The pellets are further classified according to the quality categories of ISO 17225-2. The results showed that the lignin content of the biomass influences the moisture content required in the pelletizing process and that the variations in the properties of the biomass in natura influence the quality of the pellets. The inclusion of Pinus reduced the bulk density of the mixtures before pelletizing, the fixed carbon content, the ash content, the length and the durability of the pellets. On the other hand, the inclusion of Pinus increased the upper calorific value, the volatile content and the diamete...

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Cellulose, xylan and lignin interactions during pyrolysis of lignocellulosic biomass

Cited by 330 publications

References 36 publications

Combustion of Flax Shives, Beech Wood, Pure Woody Pseudo-Components and Their Chars: A Thermal and Kinetic Study

Combustion of Flax Shives, Beech Wood, Pure Woody Pseudo-Components and Their Chars: A Thermal and Kinetic Study

Research Article Characterization and phylogenetic affiliation of Actinobacteria from tropical soils with potential uses for agro-industrial processes.

Utilização De Resíduos Da Cadeia Produtiva Do Pinhão Para a Produção De Pellets Para Geração De Energia

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