Pelletization properties of raw and torrefied pine sawdust: Effect of co-pelletization, temperature, moisture content and glycerol addition

García, Roberto; González-Vázquez, M.P.; Pevida, C.; Rubiera, F.

doi:10.1016/j.fuel.2017.11.027

Cited by 46 publications

(24 citation statements)

References 31 publications

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“…Another parameter depending on the manufacturing process is bulk density (Larsson and Rudolfsson 2012). A percentage of the adhesive inside the planing waste seems not to influence the value of bulk density, as reported by several studies (Juan and Gonz 2020; Bartocci et al 2018;García et al 2018). The moisture content, the particle size, and the operating characteristics (pressure and temperature) of the pelletizer are the main parameters influencing the bulk density.…”

Section: Pellets Characterizationmentioning

confidence: 77%

Quality assessment of pellets and briquettes made from glued wood waste

et al. 2021

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In accordance with sustainable economic and social development, Europe supports the use of energy from renewable sources to decrease the use of fossil fuels. Among renewable energy sources, wood, especially production wood waste from the supply chain, represents an exploitable source in line with a circular economy development. In this context, processing of residues produced by wood companies becomes an important resource. This work deals with the possible energy recovery of glued wood wastes. Two solid biofuels were produced from glued wood wastes: pellets and briquettes. They have been produced in collaboration with a local company and analyzed according to the applicable EN ISO international standards. The results were compared with the limits imposed by the standards in order to identify their quality class and their applicability to the current market. The amount of adhesive present in the wood wastes does not negatively affect the intrinsic characteristics of the material that is suitable for the production of solid biofuels. In addition, the amount of wood waste containing cross-linked polyurethane was calculated in order not to compromise the quality of solid biofuels made therefrom.

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Section: Pellets Characterizationmentioning

confidence: 77%

Quality assessment of pellets and briquettes made from glued wood waste

et al. 2021

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“…The fact that barked sawdust had less volatile material was reported by Feng et al [86]. This can be attributed to the presence in the bark of significant amounts of lignin and extracts [29,37], which have a slow devolatilization rate [87], occurring in higher temperature ranges than those recorded during pelleting [88,89]. It is known that volatile matter takes part in the combustion process of biomass, directly affecting the performance and physical stability [50,84].…”

Section: Immediate Analysismentioning

confidence: 82%

The Bioenergetic Potential of Four Oak Species from Northeastern Mexico

Núñez-Retana

Wehenkel

Vega-Nieva

et al. 2019

Forests

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Lack of knowledge regarding the fuel quality of diverse tree species prevents their use. Furthermore, the potential use of wood with the bark of different tree species for pellet production is still relatively unexplored in the scientific literature. In Mexico, the sawdust of Quercus genus (oak) is underutilized, despite it being an important forest resource, due to some anatomical and technological characteristics. The sawdust of Quercus with bark is also considered to have a low economic value. The objective of this study was to analyze the energy characteristics of barked and debarked Quercus sideroxyla, Q. rugosa, Q. laeta, and Q. conzattii in order to evaluate their potential for pellet production. Granulometric distribution, bulk density, proximal analysis, and calorific value tests were carried out. The sawdust of the four tree species studied was in accordance with the limits established by the standard EN 14961-2. Sawdust with a particle size of 0.425 mm had the highest percentage of retained mass (30.33%) (p < 0.05) in the granulometry test. There were no statistical differences in granulometry (p > 0.05) between barked and debarked sawdust for all Quercus species. Barked sawdust presented higher bulk density (p < 0.05) than debarked sawdust (246 and 224 kg/m3, respectively). The moisture content did not show statistical differences (p > 0.05) between barked and debarked sawdust. The volatile material was higher (p < 0.05) in debarked sawdust (88.7%) than in barked sawdust (85.0%). The ash content was below 0.5%. The fixed carbon was higher (p < 0.05) in barked sawdust (14.6%). The calorific value was higher (p < 0.05) in barked sawdust and for the Q. rugosa species (19.5 MJ/kg). The results suggest that the oak species analyzed, both barked and debarked, showed good potential for pellet production. Future studies should quantify fuel quality for a variety of diameter distributions, and analyze pellet mechanical properties and ash slagging risk.

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“…At pressure below 6,000 N, SEC maintained a constant value with increase of moisture content and decrease of pressure, while at pressure higher than 6,000 N, SEC changed inversely. Under a certain pressure a proper amount of moisture can act as a binder that promotes particles' bonding more closely each other by forming hydrogen bonds between particle polymers, while these bonds would be substituted by water molecules if more water exists, and the result is a weaker pellet [24]. From the above analysis what can be concluded is that only at pressure above 6,000 N could the proper moisture content act as a binder efficiently for co-pelletization of ES and NFS.…”

Section: Secmentioning

confidence: 99%

Optimal Variable Combinations of Co-pelletization of Eucalyptus Sawdust and Natural Forest Sawdust

Li¹,

Huang²,

Lang³

et al. 2020

JAST-B

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Eucalyptus sawdust is a residue from fast-growing forest processing. Utilization of Eucalyptus sawdust as fuel by co-pelletization with natural forest sawdust could solve problems of waste disposal and material supply limitation of pellet production. This work targeted at providing a useful reference for improving pellet properties and optimizing variable combinations. Experiments were arranged using response surface methodology with a central composite design and carried out using a uniaxial piston-cylinder densification apparatus. Based on the analysis of variance of effects of variables on responses, the optimal models were all selected as quadratic and expressed in the form of regression equations. The differences between adjusted R 2 and predicted R 2 are all within 0.2 and the adequate precision is all greater than four illustrating the reliability of the established models. The optimal variable combinations were obtained according to the desired response goals and validation experiments were conducted. Errors between response predicted and actual values were calculated and applied to improve the model accuracy. After modification, final errors were reduced to less than 9% and could be accepted by pellet production. Experimental results also demonstrated that pellet properties and higher heating value were all increased by co-pelletization and optimization. This will be very beneficial for pellet application. Furthermore, these results could provide the required data for designing a suitable machine of pellet production.

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Pelletization properties of raw and torrefied pine sawdust: Effect of co-pelletization, temperature, moisture content and glycerol addition

Cited by 46 publications

References 31 publications

Quality assessment of pellets and briquettes made from glued wood waste

Quality assessment of pellets and briquettes made from glued wood waste

The Bioenergetic Potential of Four Oak Species from Northeastern Mexico

Optimal Variable Combinations of Co-pelletization of Eucalyptus Sawdust and Natural Forest Sawdust

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