劣质渣油性质对受热生焦趋势影响的研究

发布时间：2019-06-20 03:18

【摘要】：以四种劣质渣油为原料,研究组成性质对其热转化过程初期生焦特性的影响。结果表明,不同油样生焦诱导期受温度改变的影响程度可以用敏感度参数衡量,生焦诱导期越短的油样,敏感度参数越大,反应温度升高其生焦诱导期降低率越大。相同反应条件下,劣质渣油的生焦特性取决于其自身的基本性质,且各个性质对其生焦特性的影响程度不一。残炭、灰分、分子量、沥青质沉淀点和稳定性参数与其生焦诱导期相关性较强,其中,沥青质沉淀点和稳定性参数均反映的是油样胶体稳定性的突出影响。劣质渣油自身的胶体稳定性与其生焦密切相关,胶体稳定性越差的渣油,越容易生焦,油样的生焦过程是热反应过程中胶体体系逐渐被破坏的过程。
[Abstract]:Four kinds of inferior residual oil were used as raw materials to study the effect of composition properties on the coke formation characteristics in the initial stage of thermal conversion. The results show that the influence of temperature on the coke induction period of different oil samples can be measured by the sensitivity parameters. The shorter the coke induction period is, the greater the sensitivity parameters are, and the greater the coke induction period decreases with the increase of reaction temperature. Under the same reaction conditions, the coke formation characteristics of inferior residue depend on its own basic properties, and the influence of each property on its coke formation characteristics is different. Residual carbon, ash, molecular weight, asphaltene precipitation point and stability parameters have strong correlation with coke induction period, in which asphaltene precipitation point and stability parameters reflect the outstanding influence of oil colloid stability. The colloidal stability of inferior residue itself is closely related to its coke formation. The worse the colloidal stability is, the easier it is to coke. The coke formation process of oil samples is the process in which the colloidal system is gradually destroyed in the process of thermal reaction.
【作者单位】：中国石油大学(华东)化学工程学院重质油国家重点实验室;山东海成石化工程设计有限公司;
【基金】：国家自然科学基金(U1362101) 山东省自然科学基金(ZR2014BQ030)资助~~
【分类号】：TE624

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