Pyrolysis distillates from tree bark and fibre hemp inhibit the growth of wood-decaying fungi

Barbero-López, Aitor; Chibily, Soumaya; Tomppo, Laura; Salami, Ayobami; Ancin‐Murguzur, Francisco Javier; Venäläinen, Martti; Lappalainen, Reijo; Haapala, Antti

doi:10.1016/j.indcrop.2018.12.049

Cited by 31 publications

(18 citation statements)

References 40 publications

(46 reference statements)

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“…The pyrolysis process and the reactor setup have been described in detail earlier (for brief technical description, see the Supporting Information ). 52 A schematic diagram of the pyrolysis reactor is shown in Figure S1 . Briefly, heating was performed in three stages, drying, torrefaction, and slow pyrolysis, occurring at temperatures of 135, 275, and 350 °C, respectively.…”

Section: Methodsmentioning

confidence: 99%

Valorization of Bark from Short Rotation Trees by Temperature-Programmed Slow Pyrolysis

et al. 2021

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The tree bark represents an abundant but currently underutilized forest biomass side stream. In this work, temperature-programmed slow pyrolysis with fractional condensation was used for thermochemical conversion of the bark obtained from three short rotation tree species, aspen, goat willow, and rowan. Heating was performed in three stages, drying (135 °C), torrefaction (275 °C), and pyrolysis (350 °C), and the resulting vapors were condensed at 120, 70, and 5 °C, producing nine liquid fractions. An additional fraction was collected in the pyrolysis stage at 0 °C. The obtained liquid fractions were characterized in terms of their yields and bulk chemistry (i.e., CHNOS content, water content, pH, and total acid number) as well as their molecular level chemistry by high-resolution mass spectrometry. The highest liquid yields were obtained for the fractions condensed at 70 °C. The water content varied considerably, being the highest for the drying fractions (>96%) and the lowest for the pyrolysis fractions obtained at 120 °C (0.1–2%). Considerable compositional differences were observed between the liquid fractions. While the drying fractions contained mostly some dissolved phenolics, the torrefaction fractions contained more sugaric compounds. In contrast, the pyrolysis fractions were enriched lipids (e.g., suberinic fatty acids and their derivatives) and alicyclic/aromatic hydrocarbons. These fractions could be further refined into different platforms and/or specialty chemicals. Thus, slow pyrolysis with fractional condensation offers a potential route for the valorization of tree bark residues from forest industry.

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Section: Methodsmentioning

confidence: 99%

Valorization of Bark from Short Rotation Trees by Temperature-Programmed Slow Pyrolysis

et al. 2021

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“…Pyrolysis distillate components were studied by Barbero-López [ 122 ] as a potential alternative resource for wood preservative agents. Hemp, birch and spruce distillates at a concentration of 1% inhibited the growth of C. puteana, R. placenta and G. trabeum .…”

Section: Antifungal Substances Of Plant Originmentioning

confidence: 99%

Natural Compounds for Wood Protection against Fungi—A Review

Broda

2020

Molecules

119

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Wood is a renewable, versatile material with multiple applications and the largest terrestrial pool of sequestered carbon. However, it is susceptible to degradation, mainly caused by wood-decaying fungi. Since several traditional wood preservatives have been banned owing to their detrimental effects on humans and the environment, extending the lifespan of wood products using new generation natural preservatives is an imperative from the perspectives of human health and environmental protection. Several natural compounds of plant and animal origin have been tested for their fungicidal properties, including essential oils, tannins, wood extractives, alkaloids, propolis or chitosan; and their enormous potential in wood protection has been shown. Although they are not free of limitations, the potential methods to overcome their drawbacks and enhance their bioactivity already exist, such as co-impregnation with different polymers, cross-linkers, metal chelators or antioxidants. The presence of the discrepancies between laboratory tests and the field performance, as well as legislation-related problems resulting from the lack of standards defining the quality and performance of natural protective formulations, however, create an urgent need for further thorough research and arrangements. The collaboration with other industries interested in the utilisation of natural active compounds will reduce the associated costs, thus, will facilitate the successful implementation of alternative antifungal agents.

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“…The antifungal tests in agar plates, such as the one used in this experiment, provide information about how the chemicals tested affect the metabolism of fungi [2]. This test excludes other wood-related factors that may hinder the effects caused by the studied chemicals, such as the wood anatomy or the variability in the distribution of the structural compounds [22].…”

Section: Resultsmentioning

confidence: 99%

“…The quest for new wood preservatives is driven by the increasing tolerance of fungi to copper, the society´s environmental awareness and more strict regulations in chemical legislation in traditional wood preservatives. As some bio-based chemicals are known to be effective wood-decaying fungi inhibitors, such as tannins [1] and wood pyrolysis distillates [2], they have gained attention as substitutes of the traditional wood preservatives.…”

Section: Introductionmentioning

confidence: 99%

Antifungal Activity of Several Vegetable Origin Household Waste Extracts Against Wood-Decaying Fungi In Vitro

Barbero-López

2020

Waste Biomass Valor

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The aim of this paper is to identify if vegetable origin household wastes (VHWs) can be used in wood preservative formulations. Method An antifungal activity test of the VHW hot water extracts against wood-decaying fungi in vitro was performed. Results Out of the 17 studied VHW extracts 14 showed some antifungal activity against at least one fungi. Extracts from banana, tangerine and watermelon peels and discarded onion peels inhibited fungal growth the most. Conclusions The results demonstrate that VHWs are a source of antifungal chemicals, which can be considered as an alternative or additive to present wood preservatives formulations.

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Pyrolysis distillates from tree bark and fibre hemp inhibit the growth of wood-decaying fungi

Cited by 31 publications

References 40 publications

Valorization of Bark from Short Rotation Trees by Temperature-Programmed Slow Pyrolysis

Valorization of Bark from Short Rotation Trees by Temperature-Programmed Slow Pyrolysis

Natural Compounds for Wood Protection against Fungi—A Review

Antifungal Activity of Several Vegetable Origin Household Waste Extracts Against Wood-Decaying Fungi In Vitro

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