Removal of organic sulphur from coal by using peroxyacetic acid with an ultrasonic-assisted extraction system / Nurfatin Athirah Abdul Harith

Coal desulfurization is important for producing clean coal and minimising hazardous pollutants during combustion. However, organic sulfur in coal is more difficult to remove than inorganic sulfur. Therefore, in this study, a method of Jambi coal sample desulfurization using peroxyacetic acid (PAA) with ultrasonic assisted extraction system was proposed, and experimental investigation was carried out. The influences of concentration of PAA, temperature and time on desulfurization effect were studied and the corresponding optimal value were determined by using response surface methodology (RSM). These desulfurization effect were studies and PAA are capable to reducing the organic sulfur by 35.20%. Besides that, a validated run for optimised to confirm the parameters under suggested optimal conditions process parameters at 70:30, 30°C and 10 min, indicated that the resulted in 0.47% of organic sulfur removal. This experimental showed the actual organic sulfur removal 0.47% is slightly closer resulted to predicted at 0% with the significant standard deviation of 3.52841. PAA has the advantages of good desulfurization effect especially organic sulfur due to PAA is a mild oxidising agent in coal desulfurization. In generally, PAA with ultrasonic-assisted extraction system method have potentially to remove organic sulfur in coal.