Description
Project is needed to complete the knowledge concerning renewable fuels combustion processes. The main objectives of the project are: characterization of chemical and physical properties of selected renewable fuels, identification of high risk of corrosion from ash deposits and examination of microstructure of metallic surfaces and corrosion products. The relationship between ash composition, thermal behaviour and ash fusion temperature is studied by using advanced instrumental techniques (XRF, ICP-MS, XRD, TGA, SEM-EDS, FTIR and Ash Fusion Temperature Detector). The proposed research will enlarge the knowledge in many disciplines including chemistry, combustion science, thermal engineering and material science. The obtained results will concern combustion, corrosion and material science.The ability to predict the sintering and fouling of ash is necessary to determine the corrosive impact of the ash compounds on heat transfer surfaces of a boiler. These challenges will solve by using very wide range of instrumental techniques. Based on results of research will be put implementation into energy sector.The results of the project will influence on scientific achievements in technical sciences.
Summary of project results
The share of biomass and sewage sludge in the national energy balance and development of the thermal conversion of these renewable fuels for energy production is progressive. However, during the combustion process there are important technical problems related to the behaviour of mineral matter and the formation of ash deposits. These phenomena are the consequence of the complex processes which happen during the combustion process; e.g. heat transfer, phase transformations and chemical reactions. The character of the ashes is a serious problem during combustion because of its high risk of slagging, bed agglomeration, fouling and corrosion in the combustion devices, which degrade their performance and severely damage the firing equipment. Therefore, the main aim of the project was to study the physical and chemical properties of biomass and sewage sludge have been investigated with a particular focus on their ashes. A corrosion study of the metal surface used for heat transfer in the presence of renewable fuel ashes was undertaken. Biomass ashes (containing alkali metals and chlorine) are more aggressive than sewage sludge ash, depending on the chemical composition. However, sewage sludge ash characterizes a high tendency for slagging of the ash, which can cause limitation in heat transfer. The presented results are novel and multifaceted. The relationship between ash composition, thermal behaviour and ash fusion temperature was studied by using standard and advanced analytical techniques (XRF, ICP-MS, XRD, TGA, SEM-EDS, FTIR and AFTs). In order to achieve the planned results there were done a lot of measurements to obtain the results. One of the key outcomes of this project is better understanding of mechanisms governing deposit formation, which is linked with risk-related issues. In addition, new data was obtained on fouling and slagging during biomass and sewage sludge combustion. The presented methodology of renewable fuels and their ash investigations could be helpful during design of new energy units focused on the selection of metallic materials. The obtained results of the project are corresponded to the word scientific level, what was confirmed during the presentation of these results at the international conferences in the field of combustion, energy and renewable fuels (MCS2015, IFRF2015, ECOS 2016, SEED2016, SDEWES 2016).
Summary of bilateral results