Characterization of lignites and removal of sulphur with microwave

In this thesis study, coal samples from different 10 locations in Turkey were investigated. In order to characterize the coal samples, they were analyzed in terms of chemical analysis (moisture, ash, volatile matter, fixed carbon, gross and ultimate calorific value) and elemental analysis (C,H and N). Coal samples were investigated in terms of sulphur content and sulphur types (total sulphur, pyritic sulphur and combustible sulphur). Coal samples were also analyzed in terms of their grindability (HGI). In the first step of this study, float and sink analysis 1.60 g/cm3 density medium was carried out on the coal samples. Floated coal samples were analyzed in terms of their total sulphur content, elemental analysis and HGI grindability measurements. In addition to these all, petrographic studies were carried out on the cleaned coal samples. Ash samples of floated coal samples were obtained and their ash melting degrees along with mineralogic compositions were analyzed. With the help of these abovementioned ash melting degrees and mineralogic composition analysis, Slagging and Fouling indices of the samples were determined. In the scope of this study, also microwave application was realized on the floated coal samples. The aim of the microwave application was to observe the effect of microwave on total sulphur content for the 1.60 g/cm3 density floated coal samples. Microwave studies resulted as total sulphur content of Çayırhan coal sample decreased down from 4,08 % to 2.36 % while total sulphur content of Ekizköy coal sample decreased from 5,57 % to 3,16 %. Removal percentages of total sulphur content of Çayırhan and Ekizköy coal samples were %42,16 and %43,27, respectively.