Cracking of Resinous-Asphaltene Extra-Heavy Oil Compounds on the Highly Developed Surface of a Coal Additive

IF 0.6 4区 工程技术 Q4 ENERGY & FUELS Chemistry and Technology of Fuels and Oils Pub Date : 2024-07-19 DOI:10.1007/s10553-024-01712-y
E. G. Zaitseva, R. I. Gilyazev, Ya. V. Onishchenko, A. V. Vakhin, S. M. Petrov, N. Yu. Bashkirtseva
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Abstract

The paper presents the results of cracking of extra-heavy oil in the pore space of a coal additive in a nitrogen atmosphere and in a subcritical aqueous fluid at a temperature of 365°C and a pressure of 17 MPa. The coal additive consisted of an amorphous carbon phase forming a developed microporous structure. An analysis using scanning electron microscopy and adsorption porometry established that a vapor- air modification of the coal additive changes its surface relief and leads to the development of a micro- and mesopore structure. The intrapore space of the modified coal additive contains 38.6 vol % mesopores with a specific surface area of 172 m2/g. The final products of extra-heavy oil cracking with the proposed coal additive are characterized by an increase in the content of saturated and aromatic hydrocarbons, as well as by an almost complete absence of asphaltenes. The largest hydrocarbon yield was observed during extra-heavy oil cracking in a nitrogen atmosphere. In experiments, asphaltene conversion processes are observed due to the destruction of C–C, C–N, and C–O bonds with the formation of low-boiling compounds and high-carbon substances. The largest yield of aromatic hydrocarbons is observed during cracking in a subcritical aqueous fluid, with the yield of liquid products being reduced due to intensive gas formation. The hydrocarbon composition of gases is dominated by lower alkanes, which indicates the destruction of C–C bonds.

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树脂-沥青质特重油化合物在煤添加剂高度发达的表面上裂解
本文介绍了在氮气环境和亚临界水性流体中,在温度为 365°C 和压力为 17 兆帕的条件下,特重油在煤添加剂孔隙中的裂解结果。煤添加剂由无定形碳相组成,形成发达的微孔结构。利用扫描电子显微镜和吸附孔隙度测定法进行的分析表明,煤添加剂的气相改性改变了其表面浮雕,并导致微孔和中孔结构的形成。改性煤添加剂的孔内空间含有 38.6 Vol % 的中孔,比表面积为 172 m2/g。使用这种煤添加剂进行特重油裂解的最终产物的特点是饱和烃和芳香烃含量增加,几乎完全不含沥青质。在氮气环境下进行特重油裂解时观察到的碳氢化合物产量最大。在实验中,由于 C-C、C-N 和 C-O 键被破坏,形成了低沸点化合物和高碳物质,从而观察到沥青质转化过程。在亚临界水性流体中进行裂解时,可观察到芳香烃的产量最大,而液态产品的产量则由于密集气体的形成而减少。气体的碳氢化合物成分以低烷烃为主,这表明 C-C 键遭到破坏。
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来源期刊
Chemistry and Technology of Fuels and Oils
Chemistry and Technology of Fuels and Oils 工程技术-工程:化工
CiteScore
0.90
自引率
16.70%
发文量
119
审稿时长
1.0 months
期刊介绍: Chemistry and Technology of Fuels and Oils publishes reports on improvements in the processing of petroleum and natural gas and cracking and refining techniques for the production of high-quality fuels, oils, greases, specialty fluids, additives and synthetics. The journal includes timely articles on the demulsification, desalting, and desulfurizing of crude oil; new flow plans for refineries; platforming, isomerization, catalytic reforming, and alkylation processes for obtaining aromatic hydrocarbons and high-octane gasoline; methods of producing ethylene, acetylene, benzene, acids, alcohols, esters, and other compounds from petroleum, as well as hydrogen from natural gas and liquid products.
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