Research Information System
Chemical Papers, 2025 (SCI-Expanded, Scopus)
Today, due to limited energy resources and environmental concerns, the use of clean energy is getting more important case. Coal is one of the most important fossil fuels used for early years. However, the gas emissions such as sulphur during its conventional use are extremely harmful for environment and human health. Especially high-sulphur content coals produced more SO3 and SO2 gases. With the scope of clean energy technologies, the present study aimed to determine the optimum conditions for desulphurization process of Gediz lignite which has high sulphur content (7.24%) with the approach of response surface methodology (RSM). Characterizations of coal structure were performed using X-ray diffraction and Fourier transform infrared spectroscopy before and after treatment. The input variables of optimization are selected to maximize pyritic, total, and organic sulphur and minimize the ash content. Totally, 37 experiments were performed to apply RSM optimization and analysis of variance tests. Maximum rate of pyritic sulphur removal is 100%, total sulphur removal 71.6%, organic sulphur removal 17.03%, and ash removal 13.92% estimated according to RSM optimization results. The results also show that time was found most effective parameter for pyritic and organic sulphur removal. For removal of total sulphur, temperature was the most effective parameter compared to the other selected independent parameters of sulphur removal process.