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    Wyświetlanie 1-2 z 2
    Tytuł:
    Determination of Heat of Biomass Pyrolysis and Particle Residence Time under Isothermal and Non-Isothermal Heating Conditions
    Autorzy:
    Sobamowo, M. G.
    Ojolo, S. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031615.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Biomass particle
    Heat of Pyrolysis
    Isothermal temperature
    Non- Isothermal heating
    Opis:
    The experimental investigations for determination of heat of pyrolysis have given quite different results due to the influence of the experimental conditions on the measured heat of pyrolysis of biomass. Consequently, a theoretical investigation into the process is required. Therefore, this paper presents analytical model for the determination of heat of biomass pyrolysis and particle residence time under isothermal and non-isothermal heating conditions. The developed analytical solutions are used to investigate the effects of heating conditions on the heat of biomass pyrolysis and particle residence time. From study, it is established that the heat of the pyrolysis first showed endothermic peaks and followed by exothermic peaks at different temperatures for the different heating rates. Also, as the heating rate increases, the particle residence time in the reactor decreases and high heating rates favoured the production of tar and gas. The length of heating and its intensity affect the rate, extent and sequence of pyrolysis reactions, and composition of the resultant products.
    Źródło:
    World Scientific News; 2020, 146; 60-71
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Handling and transportation properties of rapeseed biomass as affected by particle size
    Autorzy:
    Bojanowska, Milena
    Powiązania:
    https://bibliotekanauki.pl/articles/29521042.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    rapeseed meal
    rapeseed cake
    canola
    biomass
    agricultural commodities
    bulk storage
    flowability
    logistics vulnerability
    particle size
    angle of repose
    porosity
    bulk density
    agricultural bulk solids
    Opis:
    Rapeseed by-products of seeds de-oiling, particularly expellers and post-extracted meal, are currently considered an important biomass that can be used as an alternative energy source, either in raw form or after conversion to biochar. Rapeseed biomass represents a difficult-to-handle cargo, mainly due to its sensitivity to mechanical, climatic, and biological impacts, as well as its dusty nature. This study aims to determine the physical properties of rapeseed meals and their fractions. Morphological and chemical features of six particle sets are investigated in order to explain the variation in their physical properties having importance in handling and transportation processes. The true density of fractions increases when the particle size decreases due to the diminishing quantitative share of seed coats. No correlation is observed between true and bulk densities, as the particle shape, surface sculpture, and adhesion affect the mutual particle arrangements. Along with a decrease in the particle size from 0.4 mm, a rapid decrease in the flowability is observed. The tendency of the finest dust (d < 0.075 mm) to form agglomerated complexes causes its lower bulk density, higher porosity, and higher angles of repose in comparison to coarse dust (0.075–0.4 mm). It is concluded that a relatively low tendency to free flowing of natural RSM is mainly caused by its wide-ranging particle size distribution and their geometry differentiation, which facilitate mutual particle interlockings. The known cases of blockages of silos, bins, hoppers, and transfer chutes may be mainly caused by the powder fractions (< 0.2 mm), with a much lower flowability than other particles.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2023, 74 (146); 5-15
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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