Macerals (vitrinite and inertinite) were separated from a coal to understand the mechanism of interaction between them during coking. Macerals were blended in various ratios and their viscoelastic properties and expansion/contraction behaviour measured using rheometry. Inertinite increases the viscosity of vitrinite exponentially. To understand why, various solid additives were also blended with vitrinite. Additionally, the solid additives were mixed with a high viscosity liquid that does not generate volatiles (silicone oil). Results show that meso-porous solids increase viscosity exponentially, however, the exponent is far greater. Interestingly, the exponent for meso-porous and non-porous solids is the same for silicone oil, showing that volatiles are playing a role in viscosity development. Thermogravimetric analysis showed that far more volatiles are being retained for mesoporous solids, providing evidence to support the hypothesis that volatile adsorption is occurring. It is proposed that adsorption increases the driving force for liquid evaporation, which causes viscosity to increase. Only a small amount of adsorption occurred for the inertinite studied here and its effect on viscosity was mild and similar to graphite. The exponents in the viscosity vs % solid relationships could be used to evaluate solid additives, and hence, their effect on expansion/adhesion behaviour and pore structure development.

中文翻译：

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为焦化考虑，在热解过程中镜质体和固体添加剂（包括惰性体）之间的相互作用

从煤中分离出煤质（镜质体和惰性）以了解焦化过程中它们之间的相互作用机制。Macerals 以各种比例混合，并使用流变仪测量它们的粘弹性和膨胀/收缩行为。惰性使镜质体的粘度呈指数增加。为了理解原因，各种固体添加剂也与镜质体混合。此外，固体添加剂与不产生挥发物（硅油）的高粘度液体混合。结果表明，中孔固体以指数方式增加粘度，然而，指数要大得多。有趣的是，硅油中孔和无孔固体的指数是相同的，这表明挥发物在粘度发展中起作用。热重分析表明，中孔固体保留了更多的挥发物，这为支持发生挥发物吸附的假设提供了证据。提出吸附增加了液体蒸发的驱动力，从而导致粘度增加。此处研究的惰性物质仅发生少量吸附，其对粘度的影响温和且与石墨相似。粘度与固体百分比关系中的指数可用于评估固体添加剂，因此，它们对膨胀/粘附行为和孔结构发展的影响。这会导致粘度增加。此处研究的惰性物质仅发生少量吸附，其对粘度的影响温和且与石墨相似。粘度与固体百分比关系中的指数可用于评估固体添加剂，因此，它们对膨胀/粘附行为和孔结构发展的影响。这会导致粘度增加。此处研究的惰性物质仅发生少量吸附，其对粘度的影响温和且与石墨相似。粘度与固体百分比关系中的指数可用于评估固体添加剂，因此，它们对膨胀/粘附行为和孔结构发展的影响。