Thermal treatment modifies the calorific value and ash content in some wood species

Todaro, Luigi; Rita, Angelo; Cetera, Paola; D’Auria, Maurizio

doi:10.1016/j.fuel.2014.09.060

Cited by 44 publications

(26 citation statements)

References 12 publications

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“…The ash content (in a dried state) varied from 0.42% to 22.43%, with a mean of 2.64% of the mass of the input material. The mean ash content was similar to previously reported values in woody biomass, where the ash content typically ranges from 0.3% to about 6% (mean values) (Núñez-Regueira et al 2001;Friedl et al 2005;Erol et al 2010;Everard et al 2012;Todaro et al 2015). Figure 1 shows that the gross calorific value changed in the individual months (Fig.…”

Section: Resultssupporting

confidence: 87%

“…Using Sheng and Azevedo's (2005) model provided similar results, with an even more elastic relationship -a 1% increase of ash content results in 1.39% increase of wood and wood residue consumption. Given the amount of energy generated from wood and wood residues, the mass of material needed to cover it would be about 205 million t in the USA or about 781 million t in the EU, if the wood and wood residues contained 0.5% of ash -the lower end of the typical ash content interval of woody materials (Núñez-Regueira et al 2001;Friedl et al 2005;Erol et al 2010;Everard et al 2012;Todaro et al 2015). Combusting wood and wood residues with ash content considered high for woody material (5%) would lead to the need to secure an additional 11 million t of wood and wood residues in the USA or 43 million t in the EU.…”

Section: Resultsmentioning

confidence: 99%

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Ash Content vs. the Economics of Using Wood Chips for Energy: Model Based on Data from Central Europe

et al. 2017

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Biomass utilization is vital for developing sustainability in the bioenergy sector. In this work the effects of high ash content on the heating properties of wood chips were evaluated. In an analysis of 450 wood chips samples, the ash content, moisture content, and gross calorific value were determined, and a generalized linear model was created to identify the relationship between the gross calorific value and the ash content of the wood chips. The mean ash content of the analyzed wood chips samples was 2.64%, the mean moisture content was 38.8%, and the mean gross calorific value was 19.43 MJ kg -1. Statistical analyses showed that 49% of the gross calorific value variability was due to the ash content variability. A one percent increase in ash content resulted in a 0.11 MJ kg -1 decrease of gross calorific value. The estimated costs of ash disposal at various ash contents were calculated. Burning wood chips with 5% ash content would lead to depositing an extra 5.6 megatons in the US or 21.2 megatons in the EU, compared to burning wood chips with 2.5% ash content.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Ash Content vs. the Economics of Using Wood Chips for Energy: Model Based on Data from Central Europe

et al. 2017

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“…Samples weighing from 0.5 to 0.6 g were incinerated in a pure oxygen environment. According to Todaro et al (2015), the lower heat value (LHV) was calculated as:…”

Section: Methodsmentioning

confidence: 99%

“…The LHV of cellulose, hemicelluloses, and lignin are 17.3 MJ/kg, 16.2 MJ/kg, and 27.0 MJ/kg (Todaro et al 2015), respectively. Fuwape (1989) indicated that the HHVs of cellulose, lignin, and extractives isolated from Gmelina are 19.7 MJ/kg, 25.4 MJ/kg, and 25.1 MJ/kg, respectively.…”

Section: Calorific Valuementioning

confidence: 99%

Effect of Vacuum Heat Treatment on the Chemical Composition of Larch Wood

Wang¹,

Yang²,

Sun³

et al. 2016

BioResources

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“…목재는 변형이 쉽게 발생되기 때 문에 일반적으로 열처리를 많이 사용한다. 열처리 조 건은 온도와 시간에 따른 변화를 주어 열처리를 진행 하는 것에서부터, 고온 고압을 이용하며, 질소나 아르 곤 조건에서 건조과정을 거쳐 목재의 변형을 최소화 시키는 연구, 과열증기를 이용한 열처리 목재에 대한 연구도 진행되고 있다 [9][10][11]. 목재 내부에 존재하는 미 세 변형을 최소화하기 위해서는 목재 표면에 세라믹 코팅을 진행하거나 목재의 표면을 개질하는 연구도 진행되고 있다 [12][13][14].…”

Section: )unclassified

Interfacial and Mechanical properties of Different Heat Treated Wood and Evaluation of Bonding Property between Stone and Wood for Rock Bed

Kwon¹,

Shin²,

Choi³

et al. 2015

Adhesion and Interface

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Stone board for the rock bed was needed to reduce weight using thin thickness and reinforced materials. In this work, stone/wood board for rock bed was studied. Stone and wood were attached to reduce total weight of stone for rock bed. For reinforcing wood heat treatment method was used to change surface and mechanical properties. Mechanical strength of heat treated wood increased more than neat condition. The optimum heat treatment condition was set on 100°C under tensile, flexural loads whereas surface energy was also obtained by contact angle measurement. Optimum adhesive condition was to get the maximum adhesion between stone and wood. Lap shear test was performed for stone/wood board with different adhesives such as amine type epoxy, polyurethane, chloro-rubber and vinyl chloride acetate type. Fracture surface of lap shear test was shown at wood fracture part on stone using amine type epoxy adhesive. It was found that for high adhesion between stone and wood the optimum adhesive was epoxy type for the rock bed.

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Thermal treatment modifies the calorific value and ash content in some wood species

Cited by 44 publications

References 12 publications

Ash Content vs. the Economics of Using Wood Chips for Energy: Model Based on Data from Central Europe

Ash Content vs. the Economics of Using Wood Chips for Energy: Model Based on Data from Central Europe

Effect of Vacuum Heat Treatment on the Chemical Composition of Larch Wood

Interfacial and Mechanical properties of Different Heat Treated Wood and Evaluation of Bonding Property between Stone and Wood for Rock Bed

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