Técnicas multivariadas aplicadas à avaliação de resíduos lignocelulósicos para a produção de bioenergia

Protásio, Thiago de Paula; Bufalino, Lina; Guimarães, Mário; Tonoli, Gustavo Henrique Denzin; Trugilho, Paulo Fernando

doi:10.5902/1980509812361

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…The progressive evolution of the global consumption of energy based on in fossil fuels has guided humanity to a polluting and uncertain energy matrix (PROTÁSIO et al, 2013), representative of the highest percentage in GHG emissions, according to IPCC (2007). Thus, through scientific certainty, alternatives that ensure GHG emissions reduction have been increasingly sought.…”

Section: Introductionmentioning

confidence: 99%

Methodological alternatives in the estimate of biomass for young individuals of bambusa genus

et al. 2015

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ABSTRACT:The objective of this work was to evaluate the distribution of biomass in compartments, as well as to test and select methods to estimate total biomass for species of Bambusa. For the test of the methods were evaluated: method of estimation from allometric models (total and by compartments), application of allometric equation from literature and method that uses the volume, the density and biomass expansion factor (BEF). Were evaluated using the destructive method, 24 bamboos of the species Bambusa oldhamii Munro and Bambusa vulgaris Schrad. ex J. C. Wendl. For the estimation of biomass, were adjusted 5 models for the selection of the best one and the BEF calculated through the values of volume and density. These methodologies were compared among themselves and with the real biomass. The relationship of increased strength of independent variables with dried biomass measured was with dbh. In the adjustment of mathematical models, the best model was the 5 for the total biomass, model 1 for leaf and culm, and the model 3 for the limb. Of the three methodologies for estimating total biomass, the method of Biomass Expansion Factor demonstrated greater accuracy in estimates, being indicated, therefore, the potential use of this methodology.

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Section: Introductionmentioning

confidence: 99%

Methodological alternatives in the estimate of biomass for young individuals of bambusa genus

et al. 2015

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“…The low bulk density observed for cluster 1 may negatively influences in the volumetric heating value (MJ . m -³), e.g., in the amount of energy per unit volume of the combustible material (PROTÁSIO et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

INFLUENCE OF Eucalyptus WOOD ADDITION TO URBAN WOOD WASTE DURING COMBUSTION

Júnior

Anuto

Andrade

et al. 2017

CERNE

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This research analyzed the effect of the addition of E. grandis x E. urophylla wood to the wood waste of urban origin (WWU) as a strategy for energy generation. The WWU was collected in transshipment and from a sorting company of civil construction waste in the city of Piracicaba, SP. The wood of eucalyptus was obtained from a 7-year old plantation. Five treatments with proportions (%) of WWU and eucalyptus wood were analyzed: T1 = 100/0, T2 = 75/25, T3 = 50/50, T4 = 25/75 and T5 = 0/100. The treatments had the physical, chemical, immediate characteristics, mineral contaminants rate, and combustion test (ICOM) analyzed. The data were analyzed through the study of variance, correlations, and multivariate hierarchical clusters analysis (HCA). The higher content of extractives, holocellulose, volatile materials, low ash content values, rate of mineral contaminants and high performance for combustion test were observed only for the treatment having exclusively eucalyptus wood (T5). However, the addition of eucalyptus wood in the WWU allowed for the increase of the ICOM of these materials. In this way, the T3 treatment presents as the most recommended for energetic use.

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“…The high moisture content, which is linked to the low density and also observed in cluster III, can negatively interfere in the volumetric calorific value (kcal m -³), i.e. the amount of energy per unit volume of combustible material (Protásio et al, 2013). Cluster III may be classified as an intermediate for bioenergetic use depending on ash content and calorific value.…”

Section: Amentioning

confidence: 99%

Production of briquettes using coconut and eucalyptus wastes

Nunes

Andrade

Júnior

2019

Rev. bras. eng. agríc. ambient.

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This research analyzed the production and characteristics of briquettes composed of residues of Cocos nucifera and Eucalyptus pellita wood. A completely randomized design was used, having seven treatments and five repetitions per treatment. The treatments corresponded to waste percentages of coconut and eucalyptus residues as following: T1: 100% eucalyptus waste; T2: 20% coconut waste + 80% of eucalyptus waste; T3: 40% coconut waste + 60% of eucalyptus waste; T4: 50% coconut waste + 50% of eucalyptus waste; T5: 60% coconut waste + 40% of eucalyptus waste; T6: 80% coconut waste + 20% of eucalyptus waste; and, T7: 100% coconut waste. For the production of briquettes, 0.5% carboxymethylcellulose (CMC) was used as the binder. The mixtures were compacted under a load of 568 kgf cm-² for three minutes. After pressing, the briquettes were air-dried to the equilibrium moisture of the environment and, then, analyzed for physical, chemical and energy characteristics. The data were analyzed through analysis of variance, correlations and hierarchical cluster analysis (HCA). The briquettes produced with 100% of C. nucifera residues had the highest equilibrium moisture content, high volatile matter concentrations, and low fixed carbon concentrations. The basic density, the apparent specific mass and the burning rate were not affected by the composition and by the equilibrium moisture of the briquettes.

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Técnicas multivariadas aplicadas à avaliação de resíduos lignocelulósicos para a produção de bioenergia

Cited by 7 publications

References 3 publications

Methodological alternatives in the estimate of biomass for young individuals of bambusa genus

Methodological alternatives in the estimate of biomass for young individuals of bambusa genus

INFLUENCE OF Eucalyptus WOOD ADDITION TO URBAN WOOD WASTE DURING COMBUSTION

Production of briquettes using coconut and eucalyptus wastes

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