Calorific Power Improvement of Wood by Heat Treatment and Its Relation to Chemical Composition

Domingos, Idalina; Ayata, Ümit; Ferreira, José; Cruz‐Lopes, Luísa; Şen, Ali; Şahin, Sırrı; Esteves, Bruno

doi:10.3390/en13205322

Cited by 17 publications

(7 citation statements)

References 17 publications

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“…In addition, the high calorific value of the Jatropha genotypes wood was due to its high lignin content but low ash content. The calorific value of raw materials is critical in the production of energy (Domingos et al, 2020). The chemical composition of wood, specifically the lignin and ash contents, was found to be strongly associated with the heat energy of wood (Börcsök and Pásztory, 2021).…”

Section: Relationship Between Wood Quality Chemical Composition and C...mentioning

confidence: 99%

“…Because of the presence of a diverse range of organic and inorganic compounds in varying types and quantities, wood is a highly volatile material (Nasser and Aref, 2014). The calorific value of raw materials is critical to their ability to produce energy (Domingos et al, 2020). The heat energy of wood is related to its properties and chemical composition, including its cellulose, hemicellulose, lignin and ash contents (Börcsök and Pásztory, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Genotype performance and relationship between leaf traits, biomass yield and wood quality on interspecific hybrids of Jatropha

2023

ANRES

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Importance of the work: Pruning tolerance of fast-growing trees is critical for biomass energy crop cultivation. Leaf traits might be used to identify Jatropha genotypes with high biomass yields. Objectives: To evaluate the effects of pruning and performance of genotypes for leaf traits, biomass yield and wood quality in interspecific hybrids between Jatropha curcas and J. integerrima, as well as the relationships among these traits. Materials & Methods: In total, 16 Jatropha genotypes were planted in the field for 2 yr and pruned each year for biomass harvesting. Leaf traits, biomass yield, wood quality, chemical composition, and calorific value of wood were all assessed. Results: After pruning, there was no significant reduction in the overall biomass yield and leaf traits, such as leaf size, average leaf weight, specific leaf area (SLA) and SPAD chlorophyll meter reading (SCMR). Furthermore, the hemicellulose and ash contents, moisture, density and calorific value of Jatropha genotype wood were not reduced. Leaf traits, biomass yield and wood quality of a Jatropha genotype showed significant genotype variation. Interspecific hybrids KUBJL 1, KUBJL 3, KUBJL 4, KUBJL 6, KUBJL 11, and KUBJL 13 showed improved leaf traits after pruning. Pruning had no effect on the chemical composition of KUBJL 2, KUBJL 3, KUBJL 8, KUBJL 10, KUBJL 5, KUBJL 11, KUBJL 12, and KUBJL 14. Moreover, KUBJL 5, KUBJL 11, KUBJL 5, KUBJL 4, and KUBJL 2 had the highest pruning tolerance index (PTI), with fresh weight PTIs of 106.25%, 104.07%, 98.27%, and 94.57%, respectively. There were significant and highly significant correlations between biomass yield and leaf size (Pearson's coefficient [r] = -0.57 [p < 0.05] to -0.75 [p < 0.01]), average leaf weight (r = -0.58 [p < 0.05] to -0.74 [p < 0.01]), and SCMR (r = 0.64 [p < 0.05] to 0.79 [p < 0.01]). Wood calorific value was also related to leaf moisture content (r = -0.33 ns to -0.69 [p < 0.01]), wood moisture content (r = -0.73 [p < 0.01] to -0.77 [p < 0.01]), wood density (r = 0.25 ns to 0.75 [p < 0.01]), lignin (r = 0.71 [p < 0.01] to 0.74 [p < 0.01]) and ash (r = -0.73 [p < 0.01] to -0.82 [p < 0.01]). Main finding: These traits could be used to select Jatropha hybrids with high biomass yield and heat value. Furthermore, Jatropha interspecific hybrids with pruning tolerance could be selected from this study.

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Section: Relationship Between Wood Quality Chemical Composition and C...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genotype performance and relationship between leaf traits, biomass yield and wood quality on interspecific hybrids of Jatropha

2023

ANRES

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“…The holocellulose and α-cellulose content of extractive-free samples was determined by the chlorite method and by Test Method T 429 cm-10, both described in Domingos et al (2020). The percentage of holocellulose and α-cellulose were determined in relation to the dry mass of wood.…”

Section: Holocellulose and Alpha-cellulose Determinationmentioning

confidence: 99%

Changes in the content and composition of the extractives in thermally modified tropical hardwoods

Esteves

Ayata

Cruz‐Lopes

et al. 2022

Maderas, Cienc. tecnol.

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Chemical composition of wood is known to change during thermal treatments. Two species grown in Turkey, afrormosia (Pericopsis elata) and duka (Tapirira guianensis) were heat treated according to Ther-mowood® method. Lignin, cellulose, hemicelluloses and extractives in dichloromethane, ethanol and water were determined. Wood extracts were analysed by gas chromatography with mass detection and existing compounds were identified by NIST17 database. Results show that hemicelluloses and cellulose content decreased for both heat-treated woods along the treatment while lignin percentage increased. The analysis of extractives has shown several compounds normally associated to lignin thermal degradation that increased along the treatment. At the same time several compounds associated to carbohydrate thermal degradation were found in all the extracts for both heat-treated woods. These founding have allowed the understanding of the degradation pattern of wood during thermal modification. There was not much difference between afrormosia and duka woods structural compounds behaviour along thermal modification. However, the variation of the amount of extractives along the treatment depended on the species.

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“…The heating value (or calorific value) of a material/fuel is the amount of heat released when the mass unit of that material is wholly burned under certain conditions [21]. It indicates the amount of energy that could be obtained from the fuel combustion [22].…”

Section: Determination Of the Heating Value Of The Residuesmentioning

confidence: 99%

Technical and Economic Analysis of the Implementation of a Self-Sustainable Briquetting Process for Electric Generation

Martins¹,

Cardenas-Rodriguez²,

Oliveira³

et al. 2022

Energies

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The wood industry is an essential part of the economy of some regions in Brazil. Although the excess of wood residue is an environmental concern, it is also an alternative source for electricity generation. This allows for compliance with current legislation to minimize environmental impacts such as strategies to control the emission of pollutants and the decarbonization in the wood exploration activity. Despite this, the thermoelectric plants based on wood residues face problems associated with the low efficiency in generation due to the high moisture content of the residues, and challenges related to transport and storage. In this sense, this work is to evaluate the application of a self-sustainable briquetting plant as an alternative for solving the problems associated with the high moisture content, transport, and storage of wood residues. The aspects related to the construction of the briquetting plant and economic indicators associated with the economic feasibility, such as, the estimation of the net present value over the project lifecycle, internal rate of return and pay-back period, are also presented and discussed. The results demonstrated the feasibility of the plant mainly due to the better energy/volume ratio of the briquette (drying and compaction) and the transportation cost savings associated to the density of the compacted material.

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Calorific Power Improvement of Wood by Heat Treatment and Its Relation to Chemical Composition

Cited by 17 publications

References 17 publications

Genotype performance and relationship between leaf traits, biomass yield and wood quality on interspecific hybrids of Jatropha

Genotype performance and relationship between leaf traits, biomass yield and wood quality on interspecific hybrids of Jatropha

Changes in the content and composition of the extractives in thermally modified tropical hardwoods

Technical and Economic Analysis of the Implementation of a Self-Sustainable Briquetting Process for Electric Generation

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