微波和硝酸处理后炼焦煤中硫形态变化的XPS研究

为分析微波和硝酸处理对山西高硫炼焦煤中各形态硫变化的影响,应用XPS(X射线光电子能谱技术)研究了该煤样在酸洗和微波辐照后其中硫赋存状态和含量的变化。研究结果表明:煤样中无机硫含量约为14.2%,主要为硫酸盐硫;有机硫含量约为85.8%,噻吩类硫含量较高。微波和酸洗处理后,全硫脱除率为38.8%,硫醚硫醇类硫脱除率为45.1%,噻吩类硫脱除率为20%,亚砜类硫脱除率为29%,无机硫基本全部被脱除。采用酸洗和微波辐照的方法可以有效降低山西高硫炼焦煤中硫的含量,全硫脱除率高达38.8%。

XPS research on morphologic change of sulfur in coking coal after hydrogen nitrate pickling and microwave radiation

To analysis the effect of the treating of hydrogen nitrate and microwave on morphologic change of sulfur in high-sulfur coking coal in Shanxi province,using the XPS(X ray photoelectron energy spectrum technology) studied the mode of occurrence and content of sulfur in coal samples after pickling and microwave radiation.The research result shows that after treating in coal sample,the content of inorganic sulfur is 14.2%,most of which is sulphate sulfur;the content of organic sulfur is about 85.8%,main component is thiophenic sulfur.After pickling and radiation,the total removing rate of sulfur is 38.8%,the removing rate of sulfide thiol is 45.1%,and the thiophenic sulfur is 20%,the sulfoxide is 29% respectively,and inorganic sulfur almost total removed.The test indicated that using the pickling and microwave method can effectively reduce the sulfur content in high sulfur coking coal in Shanxi province,the total content of sulfur can removed by 38.8%.