REMOBAL ORGANIC SULPHRE IN COAL BY OXIDATION UNDER ULREASONIC AND MICROWAVE RADIATION
IntroductionIn China, 70% of energy needs conies from coal combustion and this situation will last for another 50 years. However, the sulfur content in Chinese coal is high, total sulfur above 2%, of which takes the 25% of total coal reserves, and organic sulfur is more than 40%. Amount of Sox released during the processes of coal combustion is a serious environmental issue, so coal applicability and waste disposal have led to increase research on pre-combustion desulfurization process, which has the potential of solving of this problem.Sulfur in coal occurs in the forms of inorganic and organic. The inorganic sulfur is present mainly in two forms, disulfides (pyrite and marcasite) and sulfate (mainly calcium, iron, and barium). The organic form, which is bound directly to the organic coal matrix, generally occurs in forms of thiols, sulfides, disulfides, thiophenes, and cyclic sulfides. The study of microwave radiation used to the desulfurization of coal was reported. It was found that inorganic sulfur could be removed effectively. Moreover, the study of ultrasonically enhanced coal desulfurization has been reported. However, only 10-25% of the organic sulfur could be taken from coal in this process. It has been an important and difficult project how to remove the organic sulfur in coal completely; up to now, no successful processes have been reported.
Jie Mi Jiancheng Wang Yongqing Yang Weiren Bao Kechang Xie
Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan, 030024, P.R.China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
205-206
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）