Miroshnichenko Denis, Bannikov Artem, Bannikov Leonid, Borisenko Olexandr
National Technical University Kharkiv Polytechnic Institute, Kyrpychova 2, Kharkiv, 61002, Ukraine.
State Enterprise Ukrainian State Scientific Research Institute of Coal Chemistry (SE UKHIN), Vesnina 7, Kharkiv, 61023, Ukraine.
Sci Rep. 2024 Nov 9;14(1):27322. doi: 10.1038/s41598-024-76434-6.
Wash oil is a fraction obtained by the distillation of coal tar and is primarily used for the absorption of light oil from coke oven gas. During operation, the oil undergoes polymerization and loses some components, necessitating the removal of the used oil and its replacement with fresh wash oil. The rheological properties of the studied oils were determined using a Brookfield DV2T rotational controlled-shear rate rheometer. Gas chromatographic analysis, gas chromatography/mass spectrometry, and IR spectroscopy were employed to evaluate the oil's characteristics. By adding individual components to the wash oil, it was found that these components could be categorized into three groups: viscosity enhancers, viscosity reducers, and non-polar oil substances with medium molecular weight that have no significant effect on viscosity. The addition of relatively polar components with greater molecular weight and a planar, rigid structure leads to an increase in viscosity. Conversely, the incorporation of naphthalene and its methyl homologues, which have lower molecular weights, reduces viscosity by disrupting intermolecular interactions; their lower heats of crystallization also inhibit the formation of structured order in the liquid, further contributing to the reduction in viscosity. The most substantial increase in oil viscosity was observed with the addition of indene-coumarone resins, attributed to their high molecular weight and polymer structure.
洗油是通过煤焦油蒸馏得到的馏分，主要用于从焦炉煤气中吸收轻油。在运行过程中，洗油会发生聚合反应并损失一些成分，因此需要去除用过的油并用新鲜洗油进行替换。使用布鲁克菲尔德DV2T旋转控制剪切速率流变仪测定了所研究油的流变特性。采用气相色谱分析、气相色谱/质谱联用和红外光谱法来评估油的特性。通过向洗油中添加单个成分，发现这些成分可分为三类：增稠剂、降稠剂和对粘度无显著影响的中等分子量非极性油类物质。添加分子量较大且具有平面刚性结构的相对极性成分会导致粘度增加。相反，加入分子量较低的萘及其甲基同系物会破坏分子间相互作用，从而降低粘度；它们较低的结晶热也会抑制液体中结构化秩序的形成，进一步导致粘度降低。添加茚-古马隆树脂时，油的粘度增加最为显著，这归因于它们的高分子量和聚合物结构。
