Thermal Degradation of the Organic Matter of High-Carbon Domanik Carbonate–Siliceous Rock in Supercritical Water in the Presence of Hydrogen Donors and Ni–Fe Catalyst
G. P. Kayukova, Z. R. Nasyrova, A. N. Mikhailova, Ya. V. Onishchenko, A. V. Vakhin
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引用次数: 0
Abstract
The effect of hydrogen donors, tetralin and 1-propanol, and of the Ni–Fe catalyst in combination with 1-propanol on the thermal degradation of the organic matter of the carbonate–siliceous rock from the Romashkino field with 7.07% Corg content in supercritical water at 374°С and pressures from 18 to 24 MPa was revealed. 1-Propanol, compared to tetralin, influences the kerogen degradation in supercritical water more efficiently and suppresses the coking. The degradation of alkyl chains of the organic matter to form saturated hydrocarbons occurs in the presence of 1-propanol most intensely. Introduction of 1-propanol into the reaction system in combination with the Ni–Fe catalyst initiates the kerogen degradation to liquid petroleum fractions to a lesser extent but activates the condensation leading to the formation of large amounts of carbenes/carboids and coke. Depending on introduction of various additives into the reaction system, the most significant differences are observed in the structural-group composition of resins in which the ratio of the СН3/СН2 groups decreases and the content of oxygen-containing S=O, С=О, and О–Н groups increases as the extent of condensation of their structure decreases. In contrast to resins, the degree of aromaticity and degree of condensation of asphaltenes increase owing to an increase in the number of hydrogen atoms in the structure of the rings. A common trend for asphaltenes and resins in all the experiments is an increase in the content of hydroxyl О–Н groups. The carbenes/carboids are characterized by relatively low content of aliphatic CH2 and CH3 groups and oxygen-containing СО groups and by high degrees of aromaticity and condensation of their structure.
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.