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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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石油沥青质含硫结构的xanes导数光谱研究
, PP. 1328-1335
Keywords: 沥青质,硫,x射线吸收近边结构谱,高阶导数谱图
Abstract:
？采用x射线近边结构谱(xanes)研究沥青质中硫的存在形态,针对沥青质的未知复杂混合体系特性,采用高阶导数谱图分析方法,提高xanes的分辨率,准确分析沥青质中硫的存在形态;采用反正切和高斯函数分峰拟合、定量解析谱图,针对不同氧化态硫3p轨道空余状态不同引起1s→3p跃迁几率不同,提出峰面积修正因子,以准确分析体系中各形态硫的相对含量。结果表明,石油沥青质中硫主要存在形式为硫醚、噻吩、亚砜、噻吩砜和硫酸酯,常减压渣油沥青质中基本不含硫醚。
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