Plastic properties of coal
Plastic properties of coal
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发表时间：
1959
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通讯作者：
E. Pierron
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作者：
E. Pierron
两种煤的相似的化学分析和塑性温度特性，但不同的最大流化度（Gieseler）进行了研究，以确定煤的组分是负责其塑性特性。对伊利诺斯州高挥发分B烟煤和东部高挥发分A烟煤进行了研究。还研究了伊利诺斯州的一部分煤，这些煤在空气中被氧化，直到其塑性被破坏。对三份样本进行浸提程序。煤用吡啶萃取，然后用氯仿萃取吡啶萃取物，最后用正己烷萃取氯仿萃取物。对煤及其抽提物和残渣进行了分析，并计算了原子H/C和O/C比值。通过X射线散射和红外光谱进一步研究了它们。用热台显微镜和Gieseler塑性仪测定了它们的塑性特性，用差热分析确定了它们的相对热分解范围。对除原始煤和来自吡啶提取的残余物之外的所有材料进行分子量测定。煤的吡啶萃取使残余物非塑性。每种溶剂的提取物产率似乎与流动性成比例。化学，X-射线和红外数据显示，每个渐进提取的相对增加的反渗透性。在每个系列中，随着提取的渐进方案的实施，每种提取物具有较低的熔点、较低的分子量和相似的热分解温度范围。在每个系列中，吡啶，氯仿和正己烷提取物是类似的其他煤研究的相应提取物。
Two coals of similar chemical analyses and plastic temperature characteristics but of different maximum fluidities (Gieseler) were investigated to determine what components of coal are responsible for its plastic properties. An Illinois high-volatile B bituminous coal and an Eastern high-volatile A bituminous coal were investigated. A portion of the Illinois coal that had been oxidized in air until its plastic properties were destroyed also was studied. The three samples were subjected to an extraction procedure. The coals were extracted with pyridine, the pyridine extract was then extracted with chloroform, and finally the chloroform extract was extracted with n-hexane. The coals and their extracts and residues were analyzed and the atomic H/C and O/C ratios were calculated. They were investigated further by x-ray scattering and infrared spectroscopy. Their plastic characteristics were determined by the Gieseler plastometer and the hotstage microscope, and the relative thermal decomposition ranges were ascertained by differential thermal analysis. Molecular weight determinations were made on all materials except the original coals and the residues from the pyridine extractions. Pyridine extraction of the coals rendered the residues nonplastic. The yield of extract for each solvent appears to be proportional to the fluidity. Chemical, x-ray, and infrared data showed a relative increase in aliphaticity with each progressive extraction. In each series, as the progressive scheme of extraction is carried out,each extract possesses a lower melting point, a lower molecular weight, and a similar thermal decomposition temperature range. In each series, the pyridine, chloroform, and n-hexane extracts are similar to the corresponding extracts of the other coals studied.