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    Flue Gas Desulfurization by Using Calcined Dolomite
    (Institute of Physics Publishing, 2019) Baslayici, S.; Bugdayci, M.; Turan, A.; Oncel, L.; Acma, E.
    SO2 emissions has begun to cause serious problems in industrialized countries. Today, various methods are used for removal of SO2 gas. SO2 gas is an important raw material for production of sulfuric acid. However, SO2 content of flue gas must be over 6% to produce sulfuric acid commercially. Flue gases, which don't have enough amount of SO2 to produce sulfuric acid commercially are harmful to the environment and human health and they must be filtered. In this study, calcined dolomite was used to remove SO2 in flue gas which doesn't have enough SO2 to produce sulfuric acid but have high emission values. Pyrite was used as SO2 source and SO2 removal efficiency of dolomite was determined for different experimental parameters. SO2 capturing system was thermodynamically modeled and SO2 capturing efficiency was determined as 77.81% in the experiments. © 2019 IOP Publishing Ltd. All rights reserved.
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    The effect of tempering time and cooling environment on the corrosion behavior of AA5083-H111 alloy
    (Wiley-V C H Verlag Gmbh, 2024) Karagoz, I.; Bugdayci, M.; Oncel, L.
    The tempering process can increase the mechanical properties of the material, such as hardness and impact strength, as well as enhance the corrosion resistance. Therefore, the selection of appropriate tempering time and cooling environment is crucial. This study aims to investigate changes in properties such as hardness, tensile strength, corrosion resistance, and microstructure of AA5083-H111 alloy after a brief tempering process (30 minutes, 45 minutes and 60 minutes) at 320 degrees C, followed by cooling in air and water environments. The study found that tempering time and cooling environment significantly affect the mechanical properties and corrosion rate. The results show that samples labeled as S30 and S60 have the highest hardness and impact strength, but the best corrosion resistance is achieved in the S60 sample. This study demonstrates that even after a limited-term tempering process, the mechanical properties and corrosion resistance of AA5083-H111 alloy can be improved. This information is crucial data for use in the production and application of alloys. The findings of this study could have important implications for the production and application of AA5083-H111 alloy in industries such as aerospace, automotive, and marine engineering. Der Anlassprozess kann die mechanischen Eigenschaften des Werkstoffes wie H & auml;rte und Schlagfestigkeit verbessern und gleichzeitig die Korrosionsbest & auml;ndigkeit erh & ouml;hen. Daf & uuml;r ist die Auswahl der geeigneten Anlasszeit und der K & uuml;hlumgebung entscheidend. Diese Studie zielt darauf ab, die Ver & auml;nderungen der Eigenschaften wie H & auml;rte, Zugfestigkeit, Korrosionsbest & auml;ndigkeit und Gef & uuml;ge der AA5083-H111 Legierung nach einem kurzfristigen Anlassprozess (30 Minuten, 45 Minuten und 60 Minuten) bei 320 degrees C und anschlie ss ender Abk & uuml;hlung in Luft- und Wasserumgebungen zu untersuchen. Die Studie hat herausgefunden, dass die Anlasszeit und die K & uuml;hlumgebung einen Einfluss auf die mechanischen Eigenschaften und die Korrosionsrate haben. Die Ergebnisse zeigen, dass die Proben mit den Bezeichnungen S30 und S60 die h & ouml;chste H & auml;rte und Schlagfestigkeit aufweisen, aber die beste Korrosionsbest & auml;ndigkeit in der Probe S60 erreicht wird. Diese Studie zeigt, dass selbst nach einem kurzfristigen Anlassprozess die mechanischen Eigenschaften und die Korrosionsbest & auml;ndigkeit der AA5083-H111 Legierung verbessert werden k & ouml;nnen. Diese Informationen sind wichtige Erkenntnisse, die in der Herstellung und Anwendung von Legierungen ber & uuml;cksichtigt werden k & ouml;nnen. Die Ergebnisse dieser Studie k & ouml;nnten wichtige Auswirkungen auf die Produktion und Anwendung der AA5083-H111 Legierung in Bereichen wie Luft- und Raumfahrt, Automobil- und Schiffbau haben. This study demonstrates that the mechanical properties and corrosion resistance of AA5083-H111 alloy can be improved through a short-term tempering process. The findings have important implications for the production and application of AA5083-H111 alloy in industries like aerospace, automotive, and marine engineering. image