摘要
对煤中不同成因的黄铁矿和高有机硫煤进行ESCA测试分析。结果表明不同成因黄铁矿的氧谱峰形差异较大。后生黄铁矿氧谱峰形向高电子伏特方向呈不对称峰,主峰为533.0eV;而原生黄铁矿氧谱则以531.5eV峰为主;成岩期黄铁矿氧谱峰形宽,强度也不如前两种。半定量分析表明黄铁矿氧化比值与铁氧化率、氧含量呈正比,由原生→成岩→后生黄铁矿方向,氧化比值依次增加。高有机硫的四川南桐6号煤和贵州贵定煤的ESCA所测硫与湿式化学分析所测硫是相一致的,其中有机硫有脂类硫化物、噻吩和砜等,且主要为噻吩硫。运用光电子能谱法能较好地判断不同成因的黄铁矿。
The pyrites of different genesis and high organic sulfur coals from Nantong coal mine in southwest China were studied by ESCA. The results show that the oxygen spectra of different genetic pyrites are much different. Peak profite of oxygen spectrum of epigenetic pyrite is bias to high binding energy with peak value at 533.0eV, while the corresponding peak of syngenetic pyrite is at 531.5eV. Diagenetic pyrite has wide oxygen spectrum in which the intensity of oxygen peak is less than those of other two kinds of pyrites. Semi -quantitative analysis shows that the oxidation ratio is proportion to S/Fe atomic ratio and oxygen content. From syngenetic through diagenetic to epigenetic pyrite, the oxidation ratio gradually increases. High organic sulfur measured by ESCA technique is comparable and consistent to that of chemical analysis. Organic sulfur consists of lipoid sulfide, thiophene, sulfone etc. Thiophene is the main existing type of sulfur.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1993年第4期413-418,共6页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
关键词
高硫煤
黄铁矿
有机硫
ESCA
煤
硫
high-sulfur coal, pyrite, organic sulfur, genesis, ESCA
