Eucalyptus Logs Drying at High Temperatures

Oliveira, Aylson Costa; Pereira, Bárbara Luísa Corradi; Carneiro, Angélica de Cássia Oliveira; Fialho, Lucas de Freitas; Figueiró, Clarissa Gusmão; Vital, Benedito Rocha; Magalhães, Mateus Alves de

doi:10.1590/1806-90882017000200007

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…presented lower density and smaller fiber dimensions. The increase in wood density is followed by an increase of fiber wall thickness and length (Oliveira et al 2010), but this was not observed in the present study. IAN 873ill.…”

Section: Chemical and Energetic Properties Basic Density And Fiber An...contrasting

confidence: 84%

Wood quality of ten clonal progenies of rubber tree as raw material for bioenergy

Amorim¹,

Longui²,

Freitas³

et al. 2023

Maderas, Cienc. tecnol.

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The use of wood as a bioenergetic source requires knowledge of its technical properties. The rubber tree Hevea brasiliensis has an economic life cycle of 25 to 30 years in Brazil. It is used for extracting rubber and generating residual wood for fuel. Our goal was to characterize the wood quality of 10 clonal progenies as a source of raw material for bioenergy. Ten clonal progenies of 12-year-old Hevea brasiliensis from an experimental planting in Selvíria municipality were evaluated. Three trees per clone were evaluated for individual properties of Higher Heating Value, immediate chemical analysis, chemical composition, fiber di-

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Section: Chemical and Energetic Properties Basic Density And Fiber An...contrasting

confidence: 84%

Wood quality of ten clonal progenies of rubber tree as raw material for bioenergy

Amorim¹,

Longui²,

Freitas³

et al. 2023

Maderas, Cienc. tecnol.

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“…Figure 5 shows that the moisture loss as a function of diameter class did not present significant differences. The effect of diameter on wood drying in eucalyptus logs was verified by Zanuncio et al (2014) and Oliveira et al (2017). These authors observed that smaller diameters had higher drying rates, compared to the ones with larger diameter logs.…”

Section: Wood Dryingmentioning

confidence: 88%

Wood Dryers: A Sustainable Alternative for Increased Charcoal Production

Figueiró

Carneiro²,

Fialho³

et al. 2019

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The aim of the study was to evaluate the technical and economic viability of a wood dryer in the charcoal production. Drying was carried out for 72 hours using wood from Eucalyptus sp. in two classes of diameter. The average admission temperature of combustion gases in the dryer was 100-150ºC. It was determined the mass of water withdrawn by drying and estimated the amount of wood that would be consumed during the pyrolysis to remove the same amount of water, being this wood converted into charcoal mass. In the economic analysis were determined the indicators net present value, internal rate of return and discounted payback. The dryer presented technical feasibility, reducing wood moisture by 8% and, consequently, increasing the charcoal productivity by 3.3%, and economic viability, with good financial indicators for current market conditions, including a discounted payback of 6 years. In this way, the use of a wood dryer was presented as an efficient way to take advantage of an environmental liability of pyrolysis, which contributes to the increase of sustainability in the charcoal production.

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“…The drying rate is highest at the beginning with the removal of all free water until the fiber saturation moisture (Skaar 1972). After this step, the drying rate is lower due to the higher energy expenditure to remove the adsorption water until the wood reaches equilibrium moisture content, when the difference between sorption and adsorption becomes zero (Oliveira et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Drying of eucalyptus logs from plantations with different spacing between trees

Silva

Zanuncio

Carvalho

et al. 2022

BioRes

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The adoption of dense plantations can reduce the drying time of the logs, by optimizing this step. This study evaluated the drying of eucalyptus wood from plantations with different spacing (3 × 4; 3 × 3; 2 × 3; 1 × 3 m). Five trees were selected per treatment. Logs were removed from the base and at 50% and 100% of commercial height for drying evaluation for 60 days. The diameters of the eucalyptus trees from plantations with wider spacing were bigger, and the productivity per hectare was not affected by the spacing between trees. The planting spacing did not affect the initial moisture, which was higher for those removed from the top of the trees. The logs from the base from the denser spacing showed a drying rate 2.5 times higher than the same logs from the treatment with greater spacing, reducing the final moisture from 37.2 to 18.8%. The logs removed from the top of the trees reached the equilibrium moisture after the drying period. The reduction in the planting spacing reduced the wood moisture and the difference in this parameter between the logs removed from the base and top of the eucalyptus trunks.

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Eucalyptus Logs Drying at High Temperatures

Cited by 5 publications

References 10 publications

Wood quality of ten clonal progenies of rubber tree as raw material for bioenergy

Wood quality of ten clonal progenies of rubber tree as raw material for bioenergy

Wood Dryers: A Sustainable Alternative for Increased Charcoal Production

Drying of eucalyptus logs from plantations with different spacing between trees

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