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Wyświetlanie 1-3 z 3
Tytuł:
The Use of Eucalyptus Grandis Bark and Root as Raw Material in Pulp and Paper Production
Autorzy:
Çiçekler, Mustafa
Tutus, Ahmet
Üzüm, Velican
Powiązania:
https://bibliotekanauki.pl/articles/27323530.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
Eucalyptus grandis
bark
root
pulp
paper
Opis:
The suitability of Eucalyptus grandis bark and root for the pulp and paper industry was investigated. The bark of E. grandis was cooked using sodium borohydride (NaBH4) in the kraft process, while the root of E. grandis was cooked using the soda-anthraquinone (AQ) process. Four different charges (0.0, 0.3, 0.5, 0.7%) of NaBH 4 and AQ used as catalysts were added to the cooking liquor used in the processes. The chemical, mechanical and optical properties of the produced pulps were investigated and characterized. The yields, viscosity values, kappa numbers, as well as the brightness, tensile, burst and tear indices of the pulps were determined. The yield (RP: 39.1%, BP: 36.8%), viscosity value (RP: 897 cm 3/g, BP: 650 cm 3/g) and the kappa numbers (RP: 90, BP: 50) of the pulps produced from the root (RP) were higher than those of the pulps produced from bark (BP). The catalysts generally affected all the pulp properties, improving the properties of BP and RP. It was concluded that E. grandis bark and root can be suitable for the pulp and paper industry.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2023, 66, 211; Art. no. 1644-3985.425.02
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dissolving lignin components in spent liquor of simple inorganic complex bleaching eucalyptus pulp
Autorzy:
Zhou, X.-F.
Powiązania:
https://bibliotekanauki.pl/articles/52879.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Opis:
Promising results from the catalytic bleaching (Cat-bleaching) of oxygen-delignified hardwood kraft pulp (Eucalyptus urophylla × Eucalyptus grandis) with simple inorganic complexes prompted interest in discovering the soluble lignin components.The dissolved substances can be harmful to the environment and some dissolved substances may also have toxic effects on the environment. For these reasons, study of the the composition and structure of dissolved lignin components are of great importance.This investigation is part of a project on Cat-bleaching to obtain more information regarding the lignin components of bleaching effluents. The Cat-treatments of the pulp were performed at bench scale using simple inorganic complexes composed of (NH4)2S2O8 plus Cu(CH3COO)2 (Cu) or Co(CH3COO)2 (Co). The spent liquors obtained after Cat-bleaching were extracted using chloroform, in portions, and the compounds of interest from both the chloroform extracts were isolated using gravity column chromatography with the aid of the UV technique. The samples were analyzed by spectrometric(FT-IR, HSQC 2D-NMR, GC-MS) methods. The dissolved components extracted from the spent liquors from the Cat-bleaching were confirmed to be structurally similar to lignin. The major constituents extracted by organic solvents were identified as phenols, benzaldehydes, phenylethanones, benzoic acid and benzoic acid ethyl ester, which indicated extensive oxidation reactions on the pulp lignin including Cα–Cβ and alkyl-aryl cleavage in the lignin upon catalytical attack. The 2-methoxy phenol predominated, and its proportion was higher from the Cu-bleaching. But the carbonyl compounds (benzaldehyde + phenylethanone) released from the pulp after Co-bleaching had a higher ratio than those after Cu-bleaching. Identification of these carbonyl compounds from among the dissolved compounds contributed to the relation between lignin oxidation and lignin removal.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2015, 58, 194
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating forest biomass by remote sensing RADAR data in Brazil
Autorzy:
Santos, J.R.
Gama, F.F.
da Conceicao Bispo, P.
Powiązania:
https://bibliotekanauki.pl/articles/52438.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
forest biomass
biomass modelling
forest inventory
tropical forest
remote sensing
eucalyptus tree
stand
RADAR data
Brazil
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 192
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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