Abstract The structural group characteristics of resins and asphaltenes, isolated from high-sulfur natural asphaltite of the Ivanovskoe oilfield in Orenburg oblast and the liquid products of its conversion in a flow of supercritical water (SCW) at 400°C and 30 MPa with and without admixture of zinc or aluminum, have been investigated. It has been shown that as a result of SCW treatment, the molecular

Abstract The influence and effectiveness of technologies aimed at enhancing oil recovery on changes in the composition and properties of the extracted heavy oil from the Usa field have been studied. The injection into the reservoir of oil-displacing compositions containing surfactants, together with cyclic steam simulation (CSS), leads to an increase in the flow rate due to additional washing out of

Abstract Results of a study of the reaction products of asphaltene sulfonation with sulfuric acid in various temperature and time ranges have been described. The maximum sulfur content in sulfonated cation exchangers at an asphaltene sulfonation temperature of 100 and 120°С and a reaction time of 2 h has been determined. The maximum static exchange capacity of 4.3 meq/g has been found for the products

Abstract Samples of carbon-rich rocks from domanik deposits and the oil–water contact zone of the Bavly field of the Republic of Tatarstan (Russia), as well as extracts from them, have been studied by thermal analysis, IR and EPR spectroscopy, and gas–liquid chromatography. Significant differences have been revealed in the chemical composition and physicochemical properties of both soluble and insoluble

Abstract The review discusses currently relevant methods for studying petroleum resins. A significant proportion of the research work deals with the study of resins in heavy oils, for which experimental approaches have been systematized and the possibilities and limitations of the mass spectrometric, spectroscopic, X-ray, and chromatographic methods have been discussed. Published data on the effect

Abstract The transformation of the organic matter (OM) of low-permeable carbon-rich domanik rock of the Romashkino oilfield in sub- and supercritical water (SCW) at temperatures of 320, 374, and 420°C and pressures of 17, 24.6, and 24.4 MPa in a neutral medium has been studied. The original rock with a TOC content of 7% has a high oil generation potential and a low productivity index. The productivity

Abstract By studying the organic matter (OM) from the Mesozoic deposits of the Tyumen superdeep well (SG-6) as an example, deep zoning in the distribution, composition, and structure of heterocyclic components of the dispersed OM in catagenesis has been revealed. During mesocatagenesis, the composition of asphaltenes undergoes directed changes similar to those found for debitumenized OM. During apocatagenesis

Abstract The formation of organic deposits in model petroleum-containing systems of various compositions has been studied. Introduction of asphaltene–resin substances into a model paraffin system reduces the amount of precipitated wax deposit to 40 wt %; significantly changes the ratio of liquid and solid hydrocarbons in the n-alkane composition of the deposits, shifting the distribution maximum towards

Abstract One of the main characteristics of a petroleum disperse system (PDS) is the average particle diameter of the dispersed phase. The simplest and most affordable analytical method to determine this characteristic is photoelectrocolorimetry. It has been shown that the use of low-energy wave (constant magnetic field of 0.1–0.4 T, ultrasound of 50 kHz) treatment and hydrogen sulfide scavengers leads

Abstract The hydrocarbon composition of the thermolysis products of asphaltenes from biodegraded oils of the Labagan and Usa oilfields and non-biodegraded oil of the Salyukinskoe oilfield of the Timan–Pechora sedimentary basin has been studied. The IR spectra of the asphaltenes are identical, indicating their similar structural group composition. The thermolysis of the asphaltenes has been carried

Abstract Halloysite is modified with 3-aminopropyltriethoxysilane in various solvents without pretreatment. According to elemental analysis, FTIR spectroscopy, and thermogravimetry, the reaction between 3‑aminopropyltriethoxysilane and halloysite successfully proceeds regardless of the nature of the solvent. The maximum degree of functionalization of interaction products is achieved at the equimolar

Abstract The catalytic properties of GdFeO3, GdСоO3, and GdMnO3 perovskite-type complex oxides in carbon oxide hydrogenation are studied. A correlation between the composition and catalytic properties of the oxide is found. It is shown that carbon monoxide conversion increases in the following order: GdFeO3 < GdMnO3 ≤ GdСоO3; carbon dioxide conversion increases in the reverse order. Differences in

Abstract The physicochemical and catalytic properties of Cs1 – 2xNixZr2(PO4)3 (x = 0, 0.15, 0.25, 0.50) systems are studied. Double and triple nickel-containing phosphates with the NASICON structure are obtained by the sol–gel method. It is shown that these phosphates are active and stable isobutanol dehydration catalysts. The relationship between the catalytic activity in the dehydration reaction

Abstract Bimetallic catalysts MoW/СОK-12 are synthesized on the basis of mesostructured silicate COK‑12 prepared from sodium silicate aqueous solution using the Keggin structure hetero polyacid H4Si-Mo3W9O40 as an oxide precursor of the sulfide active phase and with the use of the mechanical mixture of two monometallic hetero polyacids (H4SiMo12O40 and H4SiW12O40) at a molar ratio of Mo/W = 3/9. Alumina-based

Abstract It is shown that the Fischer–Tropsch synthesis in the presence of Co–xMn/SiO2 cobalt catalysts with a manganese content of 0.5–2 wt % is characterized by high activity and C5+ hydrocarbon selectivity. The optimum concentration of manganese as a promoter is 1 wt %. The influence of manganese on the state of the surface of the catalysts in oxide and reduced forms is studied by a number of physicochemical

Abstract A method is developed for creating highly active and selective catalysts for associated petroleum gas cracking which is based on use of activated carbons derived from renewable sources of plant raw materials (Jerusalem artichoke, false flax, rape, wheat) modified with nanosized iron particles obtained in reverse-micellar solutions. It is shown that carbon matrices modified with iron nanoparticles

Abstract Perovskite-type complex oxides GdFeO3 and GdCo0.5Fe0.5O3 synthesized by the sol–gel method and gadolinium ferrite modified with cobalt oxide (5 wt %) are studied as catalysts for the dry reforming of methane. Single-phase catalysts with the perovskite orthorhombic crystal structure and an average particle size of 100–200 nm are synthesized. Catalytic activity testing shows that the surface

Abstract Mixed cobalt and nickel oxides MTiO3/TiO2 (M = Co2+, Ni2+) are synthesized. Organometallic complexes of titanium tetrabutylate Ti(OBu)4 with 1,2-dihydroxybenzene and nitrate hydrates of corresponding metals (M) synthesized under conditions of the modified sol-gel process are used as precursors. The synthesized samples are characterized by field-emission scanning electron microscopy, energy-dispersive

Abstract Effect of the chemical composition and crystal structure type of gadolinium complex oxides on their catalytic activity is studied. It is shown that nanocrystalline powders Gd2Ti2O7, Gd2Zr2O7, and Gd2Hf2O7 form highly symmetrical face-centered сubic crystal structures having localized (in Gd2Ti2O7) and delocalized (in Gd2Zr2O7 and Gd2Hf2O7) oxygen vacancies. At the same time, low-symmetrical

Abstract This study is focused on the catalytic pyrolysis of poly(vinyl chloride) over LaVOх nanostructured systems. LaVOх-type catalysts are synthesized by the solid-phase high-temperature interaction of the stoichiometric amounts of V2O5 and La2O3 and investigated by various physicochemical methods. The study of poly(vinyl chloride) noncatalytic pyrolysis under atmospheric pressure makes it possible

Abstract The highly productive supported bifunctional catalyst based on cobalt, zeolite ZSM-5, and a binding agent (boehmite) is developed for the production of gasoline and diesel hydrocarbon fractions. Influence of the concentration of the ZSM-5 zeolite in the range of 0–70 wt % and cobalt (6.4–18.0 wt %) on activity and selectivity for individual groups of hydrocarbons in the synthesis of hydrocarbons

Abstract Membrane catalysts are prepared by the chemical vapor-phase deposition of tungsten oxides on a corundum porous microfiltration membrane. The massive layer of tungsten oxides formed on the substrate is converted to carbides by temperature-programmed carbidization with С3Н8/Н2 and СН4/Н2 mixtures. Changes in the porous structure and phase composition of the catalytic layer at stages of vapor-phase

Abstract The direct hydrogenation of CO2 into dimethyl-ether (DME) has been studied in presence of zeolite-based hybrid catalysts, prepared through gel-oxalate coprecipitation of copper, zinc and zirconium precursors (in an atomic ratio of 60 : 30 : 10 respectively) in a solution containing different home-made zeolites (i.e., Sil-1, MFI, Y, FER, BEA, MOR), for a final CuZnZr/zeolite weight composition

Abstract The formation of coke on active sites in the entire volume of zeolite Y crystals has been experimentally confirmed. However, complete deactivation in the case of decationated zeolites is due to the blocking of zeolite space by coke deposition on the outer surface of the crystals. In this case, blocking occurs long before complete poisoning of the active sites in the bulk and filling the large

Abstract The review compiled by colleagues and students of B.V. Romanovsky, a professor at the Moscow State University, considers his scientific works published in the period from 1959 to 2019. By detailed analysis, it has become possible to identify five main areas that determine the scientific heritage of B.V. Romanovsky: (1) the development of kinetic methods for the study of catalysis on amorphous

Abstract Granular LTA and SOD zeolites have been synthesized, characterized, and further used to study the kinetics of water adsorption and desorption. It has been shown that LTA zeolite in a static mode provides adsorption of water vapor at the level of ~30 wt % for LTA and ~20 wt % for SOD. It has been found that during water adsorption from the gas phase on the LTA or SOD zeolite in a flow-through

Abstract Isobutylene synthesis from acetone in the presence of micro–mesoporous MOR zeolites obtained by hydrothermal recrystallization and modified with magnesium acetate by incipient wetness impregnation has been studied. A kinetic study of the reaction has been conducted, and product formation routes have been determined. It has been found that an increase in the mesopore content leads to an increase

Abstract The catalytic activity of micro- and micro–meso–macroporous zeolites of the FAU structural type and an ASM mesoporous aluminosilicate in the reaction of aniline with C3–C5 aldehydes has been studied. It has been established that under the studied conditions, (2S, 3S, 4R)-2,3-dialkyl-N-phenyl-1,2,3,4-tetrahydro-4-quinolinamines are the main products formed over the tested catalysts with the

Abstract The effect of the amount of the molecular template tetraethylammonium hydroxide (TEAOH) in the precursor mixture on the physicochemical properties of SAPO-34 crystals has been examined, and the catalysts obtained have been tested in methanol conversion to lower olefins (MTO). The analysis of the textural and acidic properties of SAPO-34, which determine the high catalytic performances of catalysts