Pinus Pinaster and Eucalyptus Globulus Energetic Properties and Ash Characterization

Viana, Hélder; Rodrigues, Abel; Lopes, Domingos; Godina, Radu; Nunes, Leonel J. R.; Matias, João C. O.

doi:10.1109/eeeic.2018.8494618

Cited by 7 publications

(15 citation statements)

References 24 publications

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“…Within this group, the wood of Eucalyptus g. is the type of biomass that present the lower HHV (17.6 MJ kg −1 ). This result agrees with the study carried out by Viana et al [5], where the higher heating value of each component (wood stem, bark stem, top, branches, and leaves) of the two species was evaluated. Concerning the Pinus pinaster, two studies carried out to in the north of Spain show that the HHV of woody component is slightly lower than branches and leaves [33,34].…”

Section: Higher Heating Valuesupporting

confidence: 93%

“…For the latter species, the values presented are very similar to the HHV values presented by Rodriguez Añón et al [32]. However, in general, the values obtained are relatively lower than those reported by Viana et al [5] ranging from 21 to 24 MJ•kg −1 .…”

Section: Higher Heating Valuesupporting

confidence: 88%

“…Secondly, biomass fixes carbon dioxide in the atmosphere by photosynthesis [4]. However, handicaps of woody biomass, such as lower energy density and heating values, and high moisture content leading to degradation and self-heating, make the handling and transportation costlier and more complex [5].…”

Section: Introductionmentioning

confidence: 99%

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Residual Agroforestry Biomass–Thermochemical Properties

Enes

Aranha

Fonseca

et al. 2019

Forests

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Research Highlights: Biomass from Mediterranean agroforestry vegetation may be a potential source of renewable energy. However, due to the high heterogeneity of this type of resource, the study of its characteristics becomes necessary for its efficient use. Objectives: The aim of this study was to evaluate the thermal and chemical properties of 14 different kinds of agroforestry biomass groups: shrubs, forest, and agricultural wastes. Materials and Methods: The higher heating value (HHV), the elemental analysis (C, H, O, N, S), ashes, mineral elements (Na, K, Ca, Mg, and P), trace elements (Mn, Fe, Zn, Ni, Cu, Cr, and Cd) and halogen elements (F and Cl) were quantified and compared with CEN/TS 147775 and CENS/TS 14961 standards, looking forward to future use for energy purposes, namely through combustion processes, as an alternative to fossil fuels. Results: The shrubs present the highest values of higher heating value (20.5 MJ kg−1), followed by the forest wastes (19.2 MJ kg−1) and the lowest in the agricultural wastes (18.5 MJ kg−1). Concerning the elemental analysis, the difference between groups C, H, and O are very small and not statistically significant, while for N, S and ashes values are higher in agricultural than shrubs and forestry wastes. The same tendency was found for the mineral nutrients. For the trace elements, the lowest content of Mn, Fe, and Zn is found in agricultural, Ni, and Cr content in the shrubs and Cu in the forest wastes. The halogen elements are present in greater amount in shrubs than agricultural and forest wastes. Conclusions: Although the high values of the halogen elements which may raise sintering problems and corrosive effect on metal parts in furnace and boiler, in general the shrubs biomass are those with better characteristics for energy uses, namely through combustion processes.

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Section: Higher Heating Valuesupporting

confidence: 93%

Section: Higher Heating Valuesupporting

confidence: 88%

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Residual Agroforestry Biomass–Thermochemical Properties

Enes

Aranha

Fonseca

et al. 2019

Forests

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“…Given this context, biomass torrefaction has emerged as an alternative capable of meeting the needs of a demanding energy market due to its ability to supply a final product according to the needs of coal users, as it is capable of directly replacing coal without the need for process changes, and therefore, prevents the need to invest significant amounts for the conversion of coal-fired power plants to biomass power plants [35]. Torrefaction can be defined as the thermochemical conversion process of biomass, occurring within a temperature range of 220 to 320 • C, at atmospheric pressure, in an oxygen-deficient environment, where the degradation of the constituent hemicellulose occurs with cellulose and lignin remaining [36][37][38][39].…”

Section: Biomass Torrefactionmentioning

confidence: 99%

Biomass Torrefaction as a Key Driver for the Sustainable Development and Decarbonization of Energy Production

Nunes

Matias

2020

Sustainability

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Climate change is a reality that affects the daily lives of people around the world, with a set of effects that are systematically felt. If there is still discussion about the real cause behind these phenomena, with differing opinions defending the anthropic origin or the origin in terrestrial cycles of geological scale, it seems to be unanimously attributed to the increased concentration of greenhouse gases—particularly to CO2. That is, whatever the source of CO2, it is commonly accepted that this is the cause of the acceleration of the climate change process, and the occurrence of extreme climate phenomena. The use of energy from renewable sources, such as solar or wind, can contribute to the replacement of energy generated from fossil sources. However, these forms of energy are dependent on uncontrollable climatic factors and are, therefore, dependent on the existence of alternatives that, when in reserve, can be activated at any time as soon as the power grid requests their activation. Thus, biomass emerges as an alternative capable of providing this answer, although it also has numerous disadvantages. Torrefaction may be the technology that corrects these drawbacks and allows for the successful use of biomass in the replacement the coal used in power generation, contributing significantly to the reduction of CO2 emissions. In addition to this possibility, it is necessary to introduce forest management models that effectively make use of all material flows generated during forestry operations, creating value-added chains, with a view toward a circular economy and resource sustainability.

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“…The evaluation of the suitability of feedstocks for the production of pellets requires an evaluation of the chemical and physical parameters affecting biofuel quality, which can largely vary between different tree species [2,3,[10][11][12][13][14] and are also influenced by location, age, genetics, and the section of the tree [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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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Pinus Pinaster and Eucalyptus Globulus Energetic Properties and Ash Characterization

Cited by 7 publications

References 24 publications

Residual Agroforestry Biomass–Thermochemical Properties

Residual Agroforestry Biomass–Thermochemical Properties

Biomass Torrefaction as a Key Driver for the Sustainable Development and Decarbonization of Energy Production

The Bioenergetic Potential of Four Oak Species from Northeastern Mexico

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