沥青烯稳定性的分子基础

IF 1.3 4区 工程技术 Q3 CHEMISTRY, ORGANIC Petroleum Chemistry Pub Date : 2024-07-08 DOI:10.1134/S0965544124030010
E. S. Okhotnikova, Yu. M. Ganeeva, E. E. Barskaya, G. R. Fazylzyanova, T. N. Yusupova, V. I. Morozov, D. S. Ivanov
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引用次数: 0

摘要

摘要 原油中沥青质的不稳定性(表现为沉淀)是在石油原料的回收和加工过程中可能出现的一个主要生产问题。本研究的目的是调查沥青质的分子结构,以揭示其沉淀的原因。为此,我们利用 EPR、NMR 和 IR 光谱对稳定(残留在溶液中)和不稳定(析出)沥青质的分子结构进行了表征。以原油沥青烯和气吹沥青为研究对象,只观察到不稳定沥青烯部分的芳烃和含氧化合物含量分别有微弱的增加和减少趋势。研究发现,稳定沥青质和不稳定沥青质的吸附能力不同。研究表明,沥青质上吸附的物种富含芳香族酸酯,去除这些物种可进一步消除稳定和不稳定沥青质之间的结构组成差异。研究结果表明,可以通过引入结构类似于天然表面活性剂的合成芳香酸酯来控制原油中沥青质的稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Molecular Basis of Asphaltene Stability

The instability of asphaltenes in crude oils, manifested in their precipitation, is a major production issue that may arise both during the recovery and processing of petroleum feedstocks. The purpose of this study was to investigate the molecular structure of asphaltenes in order to shed light on the causes of their precipitation. To this end, the molecular structures of stable (remaining in the solution) and unstable (precipitated) asphaltenes were characterized by EPR, NMR, and IR spectroscopy. Using crude oil asphaltenes and air-blown asphalt as objects for the study, only weak increasing and decreasing trends were observed in the content of aromatics and oxygenates, respectively, in the unstable asphaltene fraction. The stable and unstable asphaltenes were found to differ in adsorption capacity. It was shown that the species adsorbed on asphaltenes are rich in moieties of aromatic acid esters, and that removing these species further eliminates the structural-group composition differences between stable and unstable asphaltenes. The study findings suggest that the stability of asphaltenes in crude oils can be controlled by introducing synthetic aromatic acid esters structurally similar to natural surfactants.

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来源期刊
Petroleum Chemistry
Petroleum Chemistry 工程技术-工程:化工
CiteScore
2.50
自引率
21.40%
发文量
102
审稿时长
6-12 weeks
期刊介绍: Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.
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