Experimental Study of Low-rank Coal from South Sumatra used in Humidifier and Flash Dryer

Low-rank coal is one of the potential natural resources owned by the South Sumatra Province of Indonesia. Research to reduce water content has greatly increased its calorific value. Coal water content can be reduced with low-temperature dry air using dehumidifier and flash dryer equipment with a capacity of 0.30 g per second has been carried out on low-rank coal in South Sumatra, especially for samples of Muara Enim Coal (MEC) coal with 20 mesh and dry air temperature at 70 °C. The results showed an increase in the calorific value of 0.32% and a decrease in water content of 15.92%. The results of the proximate and ultimate analysis have also been carried out at each of the testing stages.