Abstract:

The change degree of colloidal stability of residue determines the coking tendency in the residue hydrogenation system. Asphaltene, as the core of the residue colloid system, is the key factor affecting the colloid stability. In order to deeply understand the effect of asphaltene on coking process during the residue hydrogenation, the coking properties of asphaltene are analyzed from the colloidal properties of residue, the hydrogenation conversion properties of asphaltene, the interaction between asphaltene molecules, and the aggregation properties of asphaltene molecules. With the improvement of residue conversion, coke formation of residue in the hydrogenation reaction process is inevitable, because asphaltene aggregates are formed under the condition of interaction between asphaltene molecules. In view of the complexity and variability of asphaltene molecular structure, it is the key to study the aggregation and coking mechanism of asphaltene molecules in the future to analyze the complex interaction mechanism between asphaltene molecules at the molecular level.

Key words: residue hydrogenation, asphaltene, colloid property, coking property, hydroconversion property, aggregation property

摘要：

渣油胶体稳定性的变化程度决定了渣油加氢反应体系的生焦趋势，而沥青质作为渣油胶体体系的胶核是影响胶体稳定性的关键因素。为了深入认识沥青质对渣油加氢生焦过程的影响，文章从渣油的胶体特性、沥青质的加氢转化特性、沥青质分子间的相互作用和沥青质分子的聚集特性等方面对沥青质的生焦特性进行了分析，并对沥青质的生焦过程进行了梳理。随着渣油转化率的提高，渣油在加氢反应过程中的生焦行为是必然的，根源在于在沥青质分子间相互作用的条件下形成了沥青质聚集体，然而鉴于沥青质分子结构的复杂性及多变性，从分子水平解析沥青质分子间复杂的相互作用机制是未来研究渣油加氢过程中沥青质分子的聚集及生焦机理的关键。

关键词: 渣油加氢, 沥青质, 胶体特性, 生焦特性, 加氢转化特性, 聚集特性