Browsing by Author "Koveria, Andrii"

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    The biomass use to obtain high-purity carbonaceous materials
    (National Aviation University, 2019) Kieush, Lina; Fedorov, Serhii; Koveria, Andrii; Sybyr, Artem
    The current publication considers the main criteria for biomass utilization instead of combustible fossils for the purpose of obtaining biofuels. The advantages of the biomass in comparison with the traditional non-renewable precursor materials have been shown. The results of the properties of walnut shell studies after conventional pyrolysis at the temperatures from 300 °C to 1000 °C are presented. Additionally, have been highlighted the peculiarities of the oxidative pyrolysis process as the first stage of a two stage technology for the production of high-purity carbonaceous materials from biomass. The possibility of obtaining nanomaterials from the biomass has been established, as instance can serve the hazelnut shell. The obtained results allow implementing the production technology for high-purity carbonaceous materials on an industrial scale.
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    Thermal treatment of charcoal for synthesis of high-purity carbon materials
    (Petroleum and Coal, 2020) Fedorov, Serhii; Kieush, Lina; Koveria, Andrii; Boichenko, Sergii; Sybir, Artem; Hubynskyi, Michailo; Foris, Svitlana
    The use of pure carbon materials in energy storage systems has the enormous potential for improvement of their performance. Among various carbon materials, natural and synthetic graphite is known to be the most widely used for batteries. Nonetheless, biomass as a good auxiliary carbon-containing material can also become a sustainable source of high-purity carbon material for this purpose. To examine these opportunities, a multistage technology comprised by pyrolysis of walnut shells and subsequent thermal purification of carbon residue at 3000 °C has been studied. As a result, high-purity carbon material has been synthesized, it can find the application in energy storage systems, for instance, lithium-ion batteries.