The Utilization of Tree Bark

Pásztory, Zoltán; Mohácsiné, Ildikó Ronyecz; Gorbacheva, Galina; Börcsök, Zoltán

doi:10.15376/biores.11.3.

Cited by 33 publications

(31 citation statements)

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“…For high level of acid-soluble lignin, the explanation could be proposed by suberin depolymerization during organosolv pulping. Indeed, suberin and lignin were determined to be the two major phenolic components of bark [26]. Suberin depolymerization could promote the release of organic acids such as phenolic and fatty acids, which could interfere with acid-soluble lignin determination.…”

Section: Organosolv Ligninmentioning

confidence: 99%

Transformation of Sugar Maple Bark through Catalytic Organosolv Pulping

Koumba-Yoya

Stevanović

2017

Catalysts

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Abstract:The catalytic organosolv pulping of sugar maple bark was performed adopting the concept of forest biorefinery in order to transform bark into several valuable products. Our organosolv process, consisting of pre-extracting the lignocellulosic material followed by pulping with ferric chloride as a catalyst, was applied to sugar maple bark. The pre-extraction step has yielded a mixture of phenolic extractives, applicable as antioxidants. The organosolv pulping of extractives-free sugar maple bark yielded a solid cellulosic pulp (42.3%) and a black liquor containing solubilized bark lignin (24.1%) and products of sugars transformation (22.9% of hemicelluloses), mainly represented by furfural (0.35%) and 5-hydroxymethyl furfural (HMF, 0.74%). The bark cellulosic pulp was determined to be mainly constituted of glucose, with a high residual lignin content, probably related to the protein content of the original bark (containing cambium tissue). The biorefinery approach to the transformation of a solid bark residue into valuable biopolymers (lignin and cellulose) along with phenolic antioxidants from pre-extraction and the HMF derivatives from black liquor (applicable for 2,5-diformylfuran production) is an example of a catalytic process reposing on sustainable engineering and green chemistry concepts.

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Section: Organosolv Ligninmentioning

confidence: 99%

Transformation of Sugar Maple Bark through Catalytic Organosolv Pulping

Koumba-Yoya

Stevanović

2017

Catalysts

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“…Только в Венгрии ежегодно производится около 500-600 тыс. м 3 [12], в России -примерно 30 млн м 3 древесной коры [1,4].…”

Section: деревопереработка химические технологии -------------------unclassified

“…Из-за низких механических свойств коры ее использова-ние ограничено. Кора древесины, в основном, исполь-зуется для производства энергии [9], для мульчирова-ния [6], а также для извлечения химических соедине-ний [5] и других целей [7,8,12]. Известно, что деревья могут выжить в условиях небольших лесных пожаров [3] в случае, если повреж-дения камбия отсутствуют.…”

Section: деревопереработка химические технологии -------------------unclassified

Investigation of Thermal Insulation Capacity of Tree Bark

Пастори¹,

Золтан²,

Мохачине³

et al. 2017

Forestry Engineering Journal

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The problem of industrial use of tree bark is relevant and has practical importance for complex processing of wood raw material. Barks are available in Hungary and Russia in large quantities, but they are not widely used for different purposes than producing energy. One of the perspective areas of utilization of tree bark is its use as raw material for the production of thermal insulation panels. The present study focuses on the thermal insulation capacity of tree bark. Thermal conductivity properties of two broadleaved (black locust (Robinia pseudoacacia), pannónia poplar (Populus euramericana cv. Pannónia)) and three coniferous (larch (Larix decidua), spruce (Picea abies) and scots pine (Pinus silvestris)) tree species were examined. Based on these results, the scopes of the tested species were further narrowed, while the best results showing black locust was used for pressed insulation panel. Three different fractions were produced made of grained black locust bark. Furthermore, the heat insulation capacities of bark were investigated by compressing the chipped bark particles until the lowest heat conductivity was reached. Results show a competitive thermal insulation property to the traditionally used insulation materials, the value was 0.0613 W/mK reached by black locust bark chips. The broadleaved tree bark chips have a lower thermal conductivity than coniferous species. By using fine, mid, and coarse fraction of black locust bark were produced and the difference of thermal conductivity between them was negligible. Although the fine fractionated black locust bark chip thermal conductivity was 0.042 W/mK.

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“…The higher heating value is influenced by the tree species, the parts of the living tree (stem, branch, and root), the parts of the wood (wood, bark, and foliage), and the size of the wood (Nurmi 2000). The heating value of the bark is lower than that of the wood (Knige and Schultz 1966;Požgaj et al 1997;Klašnja et al 2002;Jamnická et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The wood generally has a relatively lower ash content (0.3 to 1.3%), while the bark has significantly higher ash (3.8 to 8.6%) (Passialis et al 2008;Nosek et al 2016;Pásztory et al 2016). According to Lieskovsky et al (2017), a 1% ash content increase results in a 0.11 MJ/kg higher heating value decrease.…”

Section: Introductionmentioning

confidence: 99%

Energy-related Characteristics of Poplars and Black Locust

Komán

2018

BioResources

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Poplar and black locust plantations are widely used for production of raw materials for biofuel. In this study, the main characteristics affecting energy content were evaluated for 2-year-old plantations obtained from 3 different sites of various qualities were evaluated. The 'I-214' poplar and the black locust had smaller (16 to 21%) bark ratios, while the 'Kopecky' poplar had a higher (22 to 26%) bark gain yield. The black locust had a higher basic density than that of the poplars, which were wood (446 kg/m 3 ) and bark (402 kg/m 3 ). The higher heating value of the bark of the black locust (19.51 to 19.59 MJ/kg) and of the 'Kopecky' (19.58 to 19.86 MJ/kg) was greater than that of the wood; in the case of the 'I-214' (19.59 to 19.81 MJ/kg), the higher heating value of the wood was higher. The ash content of the bark (4.50 to 8.22%) was several times greater in the case of poplars and black locust than that of the wood (0.46 to 1.29%). In the case of the wood, the ash content increased by the degradation of the site's quality. There were remarkable differences between the black locust and the poplars, as well as the individual poplar clones among the main energetic characteristics.

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The Utilization of Tree Bark

Cited by 33 publications

References 0 publications

Transformation of Sugar Maple Bark through Catalytic Organosolv Pulping

Transformation of Sugar Maple Bark through Catalytic Organosolv Pulping

Investigation of Thermal Insulation Capacity of Tree Bark

Energy-related Characteristics of Poplars and Black Locust

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