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Reductive pyrolysis study of sulfur compounds In different Tabas coal samples (Iran)

机译：塔巴斯不同煤样品中硫化合物的还原热解研究（伊朗）

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摘要

A comparative study of the effects of mineral and pyrite removal on the determination of organic sulfur functionalities in representative, as well as its low and high sulfur analogue samples of Tabas coal (Cl seam) were studied by atmospheric pressure-temperature-programmed reduction (AP-TPR) method. The AP-TPR investigation showed the presence of di-aryl sulfides, aryl-alkyl sulfides, simple and complex thiophenic structure in all representative, low and high sulfur samples. There is no indication of the presence of pure di-alkyl sulfides, disulfides or thiols, nor oxidised sulfur forms in the samples. Only minor differences in sulfur functionalities were detected qualitatively between the three analogue samples. Quantitatively differences in sulfur forms were found to be more pronounced. The presence of CH fragments on gases emitted during AP-TPR investigation of demineralised and demineralised pyrite-free samples, shows evidence for the formation of shorter CH chains and of polyaromatic compounds, and lower molecular weight material in the demineralization and pyritic sulfur removal stages.
机译：通过大气压-程序升温还原（AP）研究了去除矿物和黄铁矿对代表性塔巴斯煤（Cl煤层）及其低硫和高硫类似物样品中有机硫官能度测定的影响。 -TPR）方法。 AP-TPR研究表明，在所有代表性的低硫和高硫样品中均存在二芳基硫化物，芳基烷基硫化物，简单和复杂的噻吩结构。没有迹象表明样品中存在纯的二烷基硫化物，二硫化物或硫醇，也没有氧化的硫形式。在三个类似样品之间定性地检测到硫官能度的微小差异。发现硫形式的定量差异更为明显。在脱矿物质和无矿物质的无黄铁矿样品的AP-TPR研究过程中，排放的气体中存在CH碎片，这表明在脱矿物质和黄铁矿除硫阶段形成了较短的CH链和多芳族化合物，以及分子量较低的物质。

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