Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

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

doi:10.15376/biores.8.1.1166-1185

Cited by 75 publications

(87 citation statements)

References 57 publications

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“…The samples retained between the 60 and 200 mesh sieves were used, in the same manner as used by (Protásio et al 2013a). The oxygen content was determined by difference (Equation 1) (Bech et al 2009; Protásio et al 2013a). Based on the contents of the elemental constituents, the ratios N/C, H/C and O/C were obtained, as well as the molar ratios and the empirical formula of biomass.…”

Section: Methodsmentioning

confidence: 99%

Babassu nut residues: potential for bioenergy use in the North and Northeast of Brazil

et al. 2014

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Babassu is considered the largest native oil resource worldwide and occurs naturally in Brazil. The purpose of this study was to evaluate the potential of babassu nut residues (epicarp, mesocarp and endocarp) for bioenergy use, especially for direct combustion and charcoal production. The material was collected in the rural area of the municipality of Sítio Novo do Tocantins, in the state of Tocantins, Brazil. Analyses were performed considering jointly the three layers that make up the babassu nut shell. The following chemical characterizations were performed: molecular (lignin, total extractives and holocellulose), elemental (C, H, N, S and O), immediate (fixed carbon, volatiles and ash), energy (higher heating value and lower heating value), physical (basic density and energy density) and thermal (thermogravimetry and differential thermal analysis), besides the morphological characterization by scanning electron microscopy. Babassu nut residues showed a high bioenergy potential, mainly due to their high energy density. The use of this biomass as a bioenergy source can be highly feasible, given their chemical and thermal characteristics, combined with a low ash content. Babassu nut shell showed a high basic density and a suitable lignin content for the sustainable production of bioenergy and charcoal, capable of replacing coke in Brazilian steel plants.

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Section: Methodsmentioning

confidence: 99%

Babassu nut residues: potential for bioenergy use in the North and Northeast of Brazil

et al. 2014

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“…The world seeks to reduce the burning of fossil fuels to reduce the greenhouse effect (Zhu et al 2011), and biomass use is a viable alternative (Protásio et al 2013, Musinguzi et al 2012, Telmo and Lousada 2011.…”

Section: Introductionmentioning

confidence: 99%

Predicting moisture content from basic density and diameter during air drying of Eucalyptus and corymbia logs

Zanuncio

Carvalho

Silva

et al. 2015

Maderas, Cienc. tecnol.

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In air drying of Eucalyptus urophylla and Corymbia citriodora logs for the production of charcoal it is necessary to be able to predict when logs have reached the required moisture content of ≤ 35%. This study is aimed to produce models using basic density and diameter to predict the moisture content of Eucalyptus urophylla and Corymbia citriodora logs after 30, 60 and 90 days drying. 1,2 m long logs were taken at three different heights from three C. citriodora trees and three trees each from two E. urophylla clones (VM4 and Mn463). The 27 debarked, end sealed logs were air dried under cover for 90 days during which the change in moisture content was monitored. The relationship between density and drying was analyzed by Pearson's correlation coefficient and the models for predicting the moisture content based on the basic density and diameter were produced. The density and the drying showed a high correlation coefficient. The coefficient of determination of the models was above 0,89 with a standard error lower than 6%. The use of the density and diameter to estimate the wood moisture content simplifies the production of the models, which can be used for Eucalyptus and Corymbia genetic materials.

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“…However, the properties of raw biomass, such as its high oxygen content, high moisture, low calorific value, large particle size, and grinding difficulty, have limited the further development of biomass application technology ( van der Stelt et al 2011;Chen et al 2012a;Yin et al 2012). Moreover, in order to avoid the CO2 costs related to transportation, leading to greater end-use efficiency, bioenergy should be generated in the same locale where biomass is produced (Protasio et al 2013). Also, the selection of an appropriate pretreatment approach is understood to be the key to addressing biomass defects.…”

Section: Introductionmentioning

confidence: 99%

Upgrading of Rice Husk by Torrefaction and its Influence on the Fuel Properties

Chen¹,

Zhou²,

Zhang³

et al. 2014

BioResources

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Torrefaction refers to thermal treatment of biomass at 200 to 300 °C in an inert atmosphere, which may increase the heating value while reducing the oxygen content and improving the storability. In this study, the effects of torrefaction temperatures on the properties of rice husk were analyzed. Torrefaction experiments were performed using a labscale device designed to reduce heat and mass transfer transient effects. A new method is described for clarifying torrefaction time and minimizing experimental error. Results from analysis of torrefaction temperatures (200, 230, 260, and 290 °C) support the supposition that the fiber structure is damaged and disrupted, the atomic oxygen ratio is reduced, the atomic carbon ratio and energy density are increased, the equilibrium moisture content is reduced, and the hydrophobic properties of rice husk are enhanced. The data presented in this paper indicate that torrefaction is an effective method of pretreatment for improving rice husk. Torrefaction at 230 to 260 °C for 30 min was found to optimize fuel properties of the torrefied rice husk.

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Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

Cited by 75 publications

References 57 publications

Babassu nut residues: potential for bioenergy use in the North and Northeast of Brazil

Babassu nut residues: potential for bioenergy use in the North and Northeast of Brazil

Predicting moisture content from basic density and diameter during air drying of Eucalyptus and corymbia logs

Upgrading of Rice Husk by Torrefaction and its Influence on the Fuel Properties

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