Thermogravimetric Study of the Effect of Particle size on the Spontaneous Combustion of Indonesian Low Rank Coal
Low-temperature oxidation of two Indonesian low rank coals was characterized by Thermogravimetric analysis (TGA).The effect of particle size on the spontaneous combustion of coal was examined.Coals were classified to-599+299,-299+249,-249-150,-150+76 and-76μm size groups and through non-isothermal method scanned from 24 to 600℃ at heating rote 5℃/min with air flow rote 50 mL/min.DTA thermogram shows that the transition temperatures decrease by decreasing the particle size.Furthermore,the weight loss increases by decreasing particle size.It is indicated that the propensity of coal to spontaneous combustion increase with decreasing particle size.The moisture loss activation energy and oxidation activation energy were calculated by an integral method using the Coats-Redfern formula.The results show that the propensity for spontaneous combustion of two coal samples (judged by the activation energy) increases by decreasing particle size.
coal spontaneous combustion particle size thermogravimetric analysis activation energy
Muksin Saleh Yulianto S.Nugroho
Mechanical Engineering Department, University of Indonesia, Depok 16424, INDONESIA
国际会议
济南
英文
101-105
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）