Proximate Analysis, Sulfur, and Calorific Value in Determining Coal Quality

Abstract One of the main parameters determining the activity of processing and utilizing coal minerals is coal quality. This research was conducted to assess the coal's purity using proximate analysis, sulfur, and calories. Coal sampling was carried out on three different seams at CV. BMK in the seam 1 sample with air-dried basis Total moisture of 22.08%, Ash 62.25%, moisture in 7.48%, Volatile matter of 23.91%, Total sulfur 0.8%, Fixed carbon 6.36%, Calorific value of 2155.77 kCal/kg. In the seam two samples, the results were air-dried based on Total moisture at 14.64%, ash at 6.29%, moisture at 6.48%, Volatile matter at 37.45%, Total sulfur at 0.37%, Fixed carbon at 49.78%, Calorific value 7336 kCal/kg. In the seam 3 sample, the results were air-dried based on Total moisture at 9.71%, ash at 2.84%, moisture at 4.57%, Volatile matter at 41.87%, Total sulfur at 0.32%, Fixed carbon at 50.72%, Calorific value 8207 kCal/kg. It can be concluded that the seam 1 sample is classified as very low-grade coal while the seam 2 and 3 samples are classified as high-grade coal. The investigation shows that the impact of volatile matter and the calorific value of coal decreased with increasing water and ash concentration, showing that the low volatile matter content had a lower calorific value. Meanwhile, the effect of carbon showed that the lower the carbon content of coal, the lower the calorific value of coal.