亚临界水脱除煤中硫的实验研究  

Study on desulfurization of coal in sub-critical water

作　　者：王刚[1] 王宝凤[1] 李文[1] 陈皓侃[1] 李保庆[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室

出　　处：《燃料化学学报》2005年第5期630-632,共3页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(92010001)。~~

摘　　要：Pre-combustion desulfurization of coal is an important method to control SO2 emission in a coal fired power plant. Desulfurization of Huayinshan coal with sub-critical water in a semi-continuous reactor was studied. The effects of temperature （320℃450℃）, pressure （5MPa15MPa） and extraction time （10min100min） on the removal of sulfur and weight loss of coal were examined. The results show that with the increase of temperature, pressure and reaction time the weight loss of coal and the removal of total sulfur in coal increase, and with the increase of temperature and reaction time the removal of organic sulfur increases. At higher temperature, sub-critical water has the characteristic of selective desulfurization. The inorganic sulfur removal is mainly a physical process. Below 370℃ the organic sulfur removal is higher than inorganic sulfur removal, but above 370℃ it is opposite. It is suggested that considering the practicability, the suitable high temperature and low pressure should be taken in the sub-critical water operation condition.Pre-combustion desulfurization of coal is an important method to control SO2 emission in a coal fired power plant. Desulfurization of Huayinshan coal with sub-critical water in a semi-continuous reactor was studied. The effects of temperature （320℃ -450℃ ）, pressure （5 MPa - 15 MPa） and extraction time （10 min - 100 min） on the removal of sulfur and weight loss of coal were examined. The results show that with the increase of temperature, pressure and reaction time the weight loss of coal and the removal of total sulfur in coal increase, and with the increase of temperature and reaction time the removal of organic sulfur increases. At higher temperature, subcritical water has the characteristic of selective desulfurization. The inorganic sulfur removal is mainly a physical process. Below 370℃ the organic sulfur removal is higher than inorganic sulfur removal, but above 370 ℃ it is opposite. It is suggested that considering the practicability, the suitable high temperature and low pressure should be taken in the sub-critical water operation condition.

关 键 词：亚临界水 煤 硫 脱除 

分 类 号：TQ53[化学工程—煤化学工程]