Torrefaction of wood and bark from Eucalyptus globulus and Eucalyptus nitens: Focus on volatile evolution vs feasible temperatures

Arteaga-Pérez, Luis E.; Segura, Cristina; Bustamante-García, Verónica; Gómez-Cápiro, Oscar; Jiménez, Romel

doi:10.1016/j.energy.2015.10.007

Cited by 61 publications

(22 citation statements)

References 42 publications

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“…The degradation of PP begins at approximately 285 • C. The T m value of the control samples was 374 • C, and for 30, 60, 90, and 120 d fungus-exposed WPCs, the maximum temperatures were 358, 364, 368, and 357 • C, respectively. The weight loss step between 200 and 400 • C corresponds to the degradation of hemicellulose and cellulose from Eucalyptus bark [73]. In this temperature range, we can notice that the TGA curves of the fungus-exposed samples displace gradually to lower temperatures in relation to the control sample (Figure 8).…”

Section: Discussionmentioning

confidence: 91%

“…At~280 • C, most of the hemicelluloses depolymerize by releasing acetic acid. The major decomposition peak was attributed to the cellulose decomposition due to cleavage of the glycosidic linkage between the monomer units liberating side hydroxyl groups [73][74][75][76]. It is well known that cellulose is composed of a long unbranched polymer of glucose and its semi-crystalline structure is highly ordered, which gives greater thermal stability to the molecule.…”

Section: Discussionmentioning

confidence: 99%

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Deterioration of Wood Plastics Composites by the White-Rot Fungus Pycnoporus sanguineus

et al. 2019

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Wood plastic composites (WPC) are characterized by the mixing of wood fibers with plastics, allowing the production of new products whose characteristics are in several aspects superior to those of the original products and represent an expanding class of durable and low-cost materials in which their uses can reduce the environmental footprint and the dependence on petroleum products. Nevertheless, WPC has some setbacks, including biodegradation, which shortens its life span. In this study, the wood composite was exposed to the white-rot fungus Pycnoporus sanguineus in order to evaluate its resistance to biodegradation. The WPC was prepared with a 1:1 ratio of Eucalyptus spp. bark as reinforcement agent and polypropylene as matrix. Mechanical and rheological properties and mass loss were evaluated from 15 to 120 days of fungus exposure. After 15 days, a mass loss was detected, which transmitted a negligible effect on the impact resistance of the composite. For the 120-day fungus-exposed composite, the fungus produced a biofilm under the WPC that create a special environment for lignocellulosic consuming led to deterioration of the mechanical properties and minor changes on the thermal–chemical stability of the WPC. Finally, the study gave a great indication of the susceptibility of a Eucalyptus-based composite to biodegradation.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Deterioration of Wood Plastics Composites by the White-Rot Fungus Pycnoporus sanguineus

et al. 2019

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“…The biochar samples have similar mass loss values between 200°C and 400°C. In the range 400°C–600°C, all biochar samples continued to lose mass slightly; this is attributed mainly to the thermal degradation of the lignin, which decomposes slowly over a wide temperature range (160–900°C) . This thermal stability associated with the solid byproducts gives biochars less reactive as solid fuels.…”

Section: Resultsmentioning

confidence: 99%

Effects of wood biomass type and airflow rate on fuel and soil amendment properties of biochar produced in a top‐lit updraft gasifier

Díez

Pérez

2018

Env Prog and Sustain Energy

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In this study, the effects of biomass type and airflow rate on the fuel and soil amendment properties of a solid byproduct (biochar, BC) produced by gasification in a top‐lit updraft reactor are studied. The results indicate that biomass with the highest fuel value index produces BC with the highest quality as a solid fuel. The best properties as a soil amendment are reached by Gua‐30‐BC as follows: the cation‐exchange capacity (CEC) of 18.6 meq/100 g, the water holding capacity (WHC) of 438%, and the total oxidizable organic carbon (TOC) of 14.2%. When the airflow increases from 20 to 40 L/min, the properties of pine BC as a solid fuel are affected. An increase in the gasification temperature leads to a diminished bulk density. Moreover, the ash content increases affecting the heating value of BC, which decreases from 27.71 to 25.5 MJ/kg. The best properties of BC as a solid fuel are reached at 20 L/min. The properties of BC as a soil amendment are affected with increased airflow as follows: the CEC decreases by 22.8%, TOC increases by 232.3%, and WHC increases by 7.6%. The best properties of BC as a soil amendment are obtained at 40 L/min. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13105, 2019

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“…Only a few papers are available on the thermal decomposition of forest residues, such as bark and stump. The thermal behavior of bark and wood of Eucalyptus tree has been studied during torrefaction [20][21]. Almeida et al [20] concluded that the mass loss is an excellent indicator of the treatment severity.…”

Section: Introductionmentioning

confidence: 99%

“…Almeida et al [20] concluded that the mass loss is an excellent indicator of the treatment severity. It was suggested [21] that the most feasible torrefaction temperature was between 298 and 310 °C for Eucalyptus wood and bark. The torrefaction of stump has been studied focusing on the kinetic evaluation [22] and the thermogravimetric results [16].…”

Section: Introductionmentioning

confidence: 99%

Comparative study on the thermal behavior of untreated and various torrefied bark, stem wood, and stump of Norway spruce

et al. 2017

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In this work, the torrefaction of different parts of Norway spruce (stem wood, bark, and stump) was studied. Three different torrefaction temperatures were applied: 225, 275, and 300 °C with 30 and 60 minutes isothermal periods. The thermal stability as well as the evolutions of the decomposition products of the untreated and torrefied samples were measured by thermogravimetry/mass spectrometry (TG/MS). The TG/MS results are interpreted in terms of the chemical composition, namely the cellulose, hemicellulose and Klason lignin content. The inorganic components of the samples were measured by inductively coupled plasma-optical emission spectroscopy (ICP-OES) technique. It was found that the effect of torrefaction temperature was greater than the effect of residence time up to 275 °C, while at 300 °C the residence time had a significant influence on the 2 composition of the torrefied samples due to the intensive decomposition of cellulose. Principal component analysis has been applied to find statistical correlations between the torrefaction temperature, the residence time, the chemical composition and the thermal parameters of the samples. The results of the principal component analysis confirmed that the chemical composition and hence the thermal properties of the studied samples changed to a greater extent at higher torrefaction temperature than at lower torrefaction temperature.

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Torrefaction of wood and bark from Eucalyptus globulus and Eucalyptus nitens: Focus on volatile evolution vs feasible temperatures

Cited by 61 publications

References 42 publications

Deterioration of Wood Plastics Composites by the White-Rot Fungus Pycnoporus sanguineus

Deterioration of Wood Plastics Composites by the White-Rot Fungus Pycnoporus sanguineus

Effects of wood biomass type and airflow rate on fuel and soil amendment properties of biochar produced in a top‐lit updraft gasifier

Comparative study on the thermal behavior of untreated and various torrefied bark, stem wood, and stump of Norway spruce

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