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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Jasinskas, Algirdas;Mieldažys, Ramūnas;Jotautienė, Eglė;Domeika, Rolandas;Vaiciukevičius, Edvardas;Marks, Marek
Title: Technical, environmental, and qualitative assessment of the oak waste processing and its usage for energy conversion
Is part of: Sustainability. Basel : MDPI AG, 2020, vol. 12, iss. 19
Extent: p. 1-14
Date: 2020
Keywords: Oak waste;Biofuel;Granules;Properties;Burning;Harmful emissions;Energy efficiency
Abstract: The article analyses and evaluates the possibilities of using oak bark, oak leaves, and their mixtures for biofuel. The preparation of this waste for the burning process (milling, granulation) has been investigated and the results have been presented together with the analysis of the prepared granules’ properties—humidity, density, strength, elemental composition, ash content, caloric value, and others. The moisture content of the oak waste granules ranged from 8.1% to 12.5%, and the granules’ density ranged from 975.8 to 1122.2 kg m-3 DM (dry matter). The amount of oak ash found was very high (from 10.4% to 14.7%)—about 10 times higher than that of wood waste granules. The calorific value determined after burning the oak bark and leaves pellets was su ciently high, ranging from 17.3 to 17.7 MJ kg-1. This thermal value of oak waste granules was close to the calorific value of the herbaceous plant species and some types of wood waste. The environmental impact of burning the granules of oak waste was also assessed. The harmful emissions of carbon monoxide and dioxide, nitrogen oxides, and unburnt hydrocarbons into the environment were found to be below the permissible limits for the incineration of oak waste granules. The highest CO gas concentration, determined when burning the oak leaves, was 1187.70 mg m-3, and the lowest NOx concentration, determined when burning the oak bark and leaf mixture granules, was 341.2 mg m-3. The coe cient of energy e ciency R of the granulated oak leaves biofuel, when the oak waste biomass moisture content was reduced by 10%, reached 3.64. It was very similar to the results of previous studies of various types of granulated straw biofuel (3.5–3.7). The research results presented show that, given that the main parameters of oak waste meet the basic requirements of solid biofuel, oak bark, leaves, and their mixture can be recommended to be used as solid [...]
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio inžinerijos fakultetas
Appears in Collections:1. Straipsniai / Articles
Universiteto mokslo publikacijos / University Research Publications

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