神府煤不同密度级组分光催化氧化的XPS研究  

XPS Analysis of Shenfu Coal with Different Density Fraction Under UV Catalytic Photooxidation

作　　者：杨志远[1,2] 周安宁[1] 张泓[2] 张群[2] 

机构地区：[1]西安科技大学化学化工学院,陕西西安710054 [2]煤炭科学研究总院西安研究院,陕西西安710054

出　　处：《中国矿业大学学报》2010年第1期98-103,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(20676110);中国博士后科学基金项目(20070421103)

摘　　要：利用XPS对比分析神府脱灰煤及其两个密度级组分D3(1.375～1.400g/cm3)和D4(>1.400g/cm3)在低温光催化氧化前后表面化学键的变化,结果表明:煤表面主要含氧官能团以碳氧键(C-O)为主,氮的存在形式在D3组分中以吡咯型氮(N-5)和吡啶型(N-6)氮为主,D4组分中主要为吡咯型氮;神府脱灰煤主要是质子化吡啶型氮和吡咯型氮.光催化氧化50h后,神府煤表面含氧官能团含量减小,碳碳骨架键(C-C)含量增大;煤中内部质子化吡啶(N-Q)转化为芳香环边缘上的吡啶氮或吡咯氮.The UV photooxidation of Shenfu coal with different density fraction, which named D3 （1. 375-1. 400 g/cm^） and D4 （〉1. 400 g/cm^3）, respectively, were carried out in a fixed bed photoreactor. The difference of structural characteristics on the surface of coal and its density fraction were analyzed comparatively using a X-ray photoelectron spectroscopy （XPS） method. The results show that the main form of oxygenous functional groups is C-O on the coal surface. Three types of coal nitrogen （pyrrolic, pyridinic and quaternary functionalities） in coal and its different density fraction, were found. The main forms of nitrogen on the surfaces of Shenfu coal were quaternary and pyrrolic, while on the surfaces of D3 density fraction were pyrrotic and pyridinic, D4 density fraction were pyrrolic, respectively. After the UV photooxidation of coal samples, the contents of oxygen functional groups of all coal samples decreased, while the contents of C-C increased. Meanwhile, the forms of quaternary nitrogen also converted to pyrrolic and pyridinic nitrogen on the surface of coal.

关 键 词：神府煤 不同密度级组分 光催化氧化 XPS 

分 类 号：TQ531.6[化学工程—煤化学工程]