基于XPS技术的不同密度煤样中硫的类型和含量研究
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摘要
为了更好的认知煤中硫的类型和结构,利用XPS测定了不同密度煤样中含硫组分的类型和含量。研究表明:在低密度煤样中无机硫含量很少,无机硫含量随煤样密度增大而增大;有机硫主要类型为硫醚(醇)类、噻吩类、(亚)砜类,其中硫醚(醇)类含量最高,噻吩次之,(亚)砜类最低,有机硫含量的总体趋势是随密度增大而降低。
The types of sulfur and its variation of content in coal samples of different densities are investigated using XPS. Result of study shows that: the low-density coal samples have only negligible content of inorganic sulfur which tends to increase with the increase of coal density; the organic sulfur is mainly in the forms of mercaptan sulfur,thiophenic sulfur and sulfoxide sulfur and among then,the mercaptan sulfur helds the lion's share,followed by thiophenic and sulfoxide sulfur; and with the increase of coal density,the organic sulfur shows largely a declining tendency. Though the research-derived accomplishments,a belter insight into the types and structure of sulfur contained in coal can be gained for improving microwave desulfurization efficiency.
The types of sulfur and its variation of content in coal samples of different densities are investigated using XPS. Result of study shows that: the low-density coal samples have only negligible content of inorganic sulfur which tends to increase with the increase of coal density; the organic sulfur is mainly in the forms of mercaptan sulfur,thiophenic sulfur and sulfoxide sulfur and among then,the mercaptan sulfur helds the lion's share,followed by thiophenic and sulfoxide sulfur; and with the increase of coal density,the organic sulfur shows largely a declining tendency. Though the research-derived accomplishments,a belter insight into the types and structure of sulfur contained in coal can be gained for improving microwave desulfurization efficiency.
引文
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[2]刘松,张明旭,黄少飞.微波氢氧化钠联合脱硫及机理分析[J].煤炭转化,2016,39(1):92-96.
[3]蔡川川.高有机硫炼焦煤对微波响应规律研究[D].淮南:安徽理工大学,2013.
[4]蔡川川,张明旭,闵凡飞.微波和硝酸处理后炼焦煤中硫形态变化的XPS研究[J].选煤技术,2013(3):1-3.
[5]葛涛.炼焦煤中有机硫赋存及噻吩硫对微波的响应规律研究[D].淮南:安徽理工大学,2015.
[6] YANG Y,TAO X,XU K,et al. Effects of microwave/HAc-H2O2,desulfurization on properties of Gedui high-sulfur coal[J]. Fuel Processing Technology,2016,143:176-184.
[7]刘艳华,车得福,徐通模.利用X射线光电子能谱确定煤及其残焦中硫的形态[J].西安交通大学学报,2004,38(1):101-104.
[8]朱应军,郑明东.炼焦用精煤中硫形态的XPS分析方法研究[J].选煤技术,2010(3):55-57.
[9]张兰君,李增华,杨永良,等.煤表面硫与氮官能团低温氧化规律XPS技术研究[J].煤矿安全,2016,47(5):85-88.
[10]葛涛,张明旭,马祥梅.新阳炼焦煤结构的FTIR和XPS谱学表征[J].光谱学与光谱分析,2017,37(8):2406-2411.
[11]陈鹏.应用XPS研究煤中有机硫在脱硫时的存在形态[J].洁净煤技术,1997(2):17-20.
[12]代世峰,任德贻,宋建芳,等.应用XPS研究镜煤中有机硫的存在形态[J].中国矿业大学学报,2002,31(3):225-228.