Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/70123115-6D94-4733-836A-46D5C7F6117A | ||
| Year | 2025 | ||
| Type of Item | Master Thesis | ||
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| Bibliographic Citation | Konstantina Zacheila, "Thermo-chemical processes for the co-processing of lignite, biomass and petroleum coke for energy and fuel production. Characteristic parameters and products", Master Thesis, School of Mineral Resources Engineering, Technical University of Crete, Chania, Greece, 2025 https://doi.org/10.26233/heallink.tuc.104753 | ||
| Appears in Collections |
This thesis focuses on the study of the production and utilization of solid fuels through thermochemical processes of pyrolysis, combustion, and gasification. The research examined samples of acacia, lignite, petroleum coke, and their mixtures in various ratios. The work included extensive characterization of the samples via proximate and ultimate analysis, mineralogical studies, and calculation of slagging indices, as well as thermogravimetric analysis and mass spectrometry experiments to evaluate thermal decomposition and the composition of gaseous products. Furthermore, the thermal behavior, reactivity, and pollutant emissions during combustion were studied, along with the yield and composition of synthesis gas during gasification.The results highlighted the characteristics and potential of each fuel and their blends. Acacia stood out for its high volatile content, low ash, and environmental friendliness, exhibiting high yields of bio-oil and gas, as well as reduced pollutant emissions. Lignite, with high ash content and moderate calorific value, benefited significantly from blending with biomass, reducing environmental burdens. Petroleum coke demonstrated high energy density but increased pollutant emissions and limited reactivity. Co-processing these materials revealed significant synergies, improving thermal efficiency and lowering emissions, especially in blends with a high biomass fraction.The findings emphasize the importance of solid fuels, particularly biomass–mineral fuel blends, as key components for a sustainable energy transition with a low environmental footprint.The results reinforce the significance of solid fuels, especially biomass–mineral fuel blends, as essential elements for a sustainable energy transition with a low environmental footprint.
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