【作者】 刘淑琴； 余学东； 余力；

【Author】 Liu Shuqin Yu Xuedong Yu Li Beijing Campus of China University of Mining & Technology, Beijing 100083

【机构】 中国矿业大学(北京校区)化环学院煤炭地下气化研究中心；

【摘要】 在褐煤地下气化模型试验的基础上,研究了褐煤中汞的赋存形态,褐煤地下气化煤气中汞含量的变化及存在形态,以及气化工艺的影响。实验结果表明,汞在试验褐煤中主要以硫化物结合态和残渣态形式存在;褐煤地下气化煤气中汞含量随气化时间的变化而变化,且主要以Hg0(g)的形态存在;水蒸汽的存在会降低Hg0(g)被其它气体氧化为Hg2+(g)的趋势;与地面气化及燃煤过程不同,煤地下气化产物中,气态汞占总汞比例低于20%,明显低于地面气化及燃煤。更多还原

【Abstract】 Based on UCG (underground coal gasification) simulation test, regularities of mercury emission in the process of UCG of lignite were studied. The results show, Mercury exists as Hg0 (g) in UCG gas and its content changes with gasification time. Steam decreases the oxidation of Hg0(g) to Hg2+(g). In addition, gaseous mercury takes up less than 20% of the total mercury in UCG products, which is lower than that from surface gasification and coal burning.更多还原