Hydrocarbons composition of thermal and catalytic cracking products of asphaltens, derived in supercritical water medium

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The hydrocarbon composition of oils of asphaltene cracking products has been studied. The experiments were conducted in three different modes: without the use of additives (without water and catalysts – a “control experiment”), in a supercritical water environment without a catalyst and in a supercritical water environment with a catalyst based on iron oxides. Cracking was carried out in a reactor at a temperature of 450°C, the duration of the experiment was 60 minutes, the catalyst was obtained in situ from tris – acetylacetonate of iron(III). The individual hydrocarbon composition of the oils isolated from cracking products was determined using chromato-mass spectral analysis on the quadrupole system GCMS-QP5050A “Shimadzu”. The hydrocarbon composition of asphaltene cracking products obtained in supercritical water differs in qualitative and quantitative characteristics from products obtained without water. When cracking asphaltenes in the water environment, the composition changes significantly compared to the “control experiment”, an increase in the proportion of saturated hydrocarbons is noted. The cracking products obtained in water with the addition of a catalyst are also dominated by saturated hydrocarbons, while the content of phthalates, alkenes and sulfur-containing compounds significantly increases.

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Kh. Nal’gieva

Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: nalgieva.1997@gmail.com
俄罗斯联邦, 634055 Tomsk

G. Pevneva

Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences

Email: pevneva@ipc.tsc.ru
俄罗斯联邦, 634055 Tomsk

N. Voronetskaya

Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences

Email: voronetskaya@ipc.tsc.ru
俄罗斯联邦, 634055 Tomsk

M. Kopytov

Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences

Email: kma@ipc.tsc.ru
俄罗斯联邦, 634055 Tomsk

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2. Fig. 1. Composition of asphaltene cracking products.

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3. Fig. 2. Mass fragmentograms of n-alkanes (m/z 57) and methylalkylbenzenes (AT m/z 105) of the products of the control experiment (a), (b), cracking in SCR (c), (d) and cracking in SCR + cat. (d), (e).

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