رسالة جامعية
Numerical modelling of pollutant formation and removal during fuel combustion ; Numeričko modeliranje nastajanja i uklanjanja polutanata pri izgaranju goriva
| العنوان: | Numerical modelling of pollutant formation and removal during fuel combustion ; Numeričko modeliranje nastajanja i uklanjanja polutanata pri izgaranju goriva |
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| المؤلفون: | Bešenić, Tibor |
| المساهمون: | Vujanović, Milan |
| بيانات النشر: | Sveučilište u Zagrebu. Fakultet strojarstva i brodogradnje. University of Zagreb. Faculty of Mechanical Engineering and Naval Architecture. |
| سنة النشر: | 2021 |
| المجموعة: | Nacionalni repozitorij disertacija i znanstvenih magistarskih radova (Nacionalna i sveučilišna knjižnica u Zagrebu) / Croatian Digital Dissertations Repository (National and University Library in Zagreb) |
| مصطلحات موضوعية: | TEHNIČKE ZNANOSTI. Strojarstvo, TECHNICAL SCIENCES. Mechanical Engineering, Fizika, Physics, info:eu-repo/classification/udc/53(043.3), flue gas desulfurisation, seawater desulfurisation, absorption modelling, mass transfer coefficient, droplet absorption, wall film absorption, spray scrubbers, SOx, pulverised fuel combustion, nitrogen oxides formation, fuel nitrogen, fuel nitrogen partitioning NOx, odsumporavanje dimnih plinova, odsumporavanje morskom vodom, modeliranje apsorpcije, koeficijent prijelaza mase, apsorpcija u kapljicu, apsorpcija u film kapljevine, scrubberi sa sprejom, izgaranje praškastog goriva, nastajanje dušikovih oksida, dušik iz goriva, raspodjela dušika iz goriva, NOx |
| الوصف: | Reduction of harmful impact on the environment caused by rapid development of a fossil fuel-powered society is one of the most significant global challenges. The combustion-related pollutants such as sulfur oxides and nitrogen oxides stand among the most harmful ones due to large amounts of emissions discharged globally. The advanced models that provide insight into pollutant production and removal processes can be useful in designing new, more sustainable technology. Numerical models presented in this work aim to improve the calculation accuracy and efficiency for complex physicochemical processes of nitrogen oxides formation during the combustion of pulverised fuels, as well as the calculation of sulfur dioxide removal from flue gases by seawater absorption in spray droplets and liquid wall film. The chemical processes of absorption in droplets were modelled for pure water by a simplified chemical model accounting for the reactions in the aqueous phase, and additionally for seawater, by introducing the influence of alkalinity that increases the absorption potential. The second part of absorption modelling is the mass transfer dynamics, and it was described by two film theory. It separates the influence of resistances for the interface’s liquid and gas side. For droplets falling in the stream of rising gases, determining the mass transfer can be an issue, and the penetration theory was selected as the most suitable among the implemented models for the dominant liquid side mass transfer coefficient. Furthermore, to account for all of the relevant processes, the absorption of sulfur dioxide in wetted walls was also modelled by adopting an analogous approach. The main difference is in the implementation of the mass transfer model, as the hydrodynamic processes influencing the liquid wall film are different. The used approach is based on dimensionless parameters and hydrodynamic characteristics of wall film. The developed and implemented models were validated against experimental data obtained in the literature for ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| وصف الملف: | application/pdf |
| اللغة: | Croatian |
| العلاقة: | https://dr.nsk.hr/islandora/object/fsb:7039Test; https://urn.nsk.hr/urn:nbn:hr:235:463980Test; https://repozitorij.unizg.hr/islandora/object/fsb:7039Test; https://repozitorij.unizg.hr/islandora/object/fsb:7039/datastream/PDFTest |
| الإتاحة: | https://dr.nsk.hr/islandora/object/fsb:7039Test https://urn.nsk.hr/urn:nbn:hr:235:463980Test https://repozitorij.unizg.hr/islandora/object/fsb:7039Test https://repozitorij.unizg.hr/islandora/object/fsb:7039/datastream/PDFTest |
| حقوق: | http://rightsstatements.org/vocab/InC/1.0Test/ ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.29D3EF6E |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |