Proses Peningkatan Nilai Kalor Batubara Lignit Samarinda Melalui Penambahan Aditif Low Wax Sulfur Residu dan Perlakuan Temperatur pada Tekanan Atmosfer

Abstract

The increasing calorific value of brown coal using upgrading brown coal (UBC) method is generally conducted by heating it at the temperature of 150^oC-160^oC and the pressure of 350 kPa, in which the coal about to be processed is previously mixed with low sulfur wax residue (LSWR) as an additive substance diluted with kerosin. This research was aimed to know the effect of the heat temperature in UBC process which was done at the atmospheric pressure to increase the calorific value of the brown coal. One gram of brown coal was mixed with 0.5 mL LSWR dissolved in kerosin. The mixture was then heated using oven heater for 1 hour with the temperature variation of 100°C, 125°C, 150°C, 175°C, and 200°C. The results of the research show that the heating process at the temperature of 175°C produced coal with the highest increase caloric value  e.g.   52,4%. The coal characteristic produced  calorificc value was 5482 cal/g, water content was 3.138%, ash content was 6.009%, volatile matter was 66.288%, and fixed carbon was 24.565%.