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Hans Schulz - One of the best experts on this subject based on the ideXlab platform.
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time resolved selectivity for unsteady regimes in catalytic Petroleum Chemistry
Catalysis Today, 2011Co-Authors: Hans SchulzAbstract:Abstract Selectivity in Petroleum Chemistry generally means multi-compound product compositions, distributed over a wide range from, e.g. hydrocarbon gases up to vapors of high boiling substances – thus providing analytical problems. Temporal resolution is required for investigating unsteady regimes of reaction, as pertinent during self-organization of catalytic processes or phenomena of catalyst deactivation. It is also of interest in temperature programmed operation as for catalyst regeneration, pyrolysis of organic materials as oil shale and biomass or TPD of pollutants recovered on adsorbents. For temporal resolution instant ampoule sampling has been developed. Ampoule samples are taken from the (hot) gaseous product flow in pre-evacuated glass ampoules in less than 1 s and stored without compositional changes for later GC-analysis. High resolution gas chromatography has been developed, starting at −80 °C for the separation of light gases and ending at, e.g. 250 °C for separating high boiling compounds (e.g. vapors of hydrocarbons C20). In the article, initial selectivity changes in Fischer–Tropsch synthesis (referring to chain growth, chain branching and olefin reactions, as caused by self-organization of the FT-regime) and also thermal regeneration of a HZSM5 catalyst used for methanol conversion at low temperature (referring to reactivation by de-alkylation of bulky benzene derivates) are being presented.
I I Ivanova - One of the best experts on this subject based on the ideXlab platform.
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application of nanosized zeolites in Petroleum Chemistry synthesis and catalytic properties review
Petroleum Chemistry, 2019Co-Authors: L I Rodionova, E E Knyazeva, S V Konnov, I I IvanovaAbstract:Studies on the preparation and catalytic action of zeolites in the form of nanosized crystals are reviewed. Examples of successful synthesis of nanosized zeolites of the FAU, MFI, BEA, and MOR structural types and their use in such processes of Petroleum Chemistry and refining as catalytic cracking, hydrocracking, hydroisomerization, oligomerization, transalkylation, conversion of methanol and acetone to olefins, and other processes are given. The progress and prospects of using nanosized zeolites in slurry reactors comprising three-phase systems, in which individual zeolite particles are dispersed in a liquid medium, are considered. Keywords: nanosized zeolites, catalytic cracking, hydrocracking, transalkylation, slurry reactor
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Synthesis of Nanoscale Zeolites
Petroleum Chemistry, 2019Co-Authors: E E Knyazeva, I I IvanovaAbstract:The review is devoted to the features of the synthesis of zeolites with nanosized crystals, which are of great interest for the processes of Petroleum Chemistry, gas Chemistry, and organic synthesis. On the basis of analysis of published data, a classification is proposed for methods of directional control of the size of zeolite crystals. Methods for qualitative and quantitative controlling the composition of the reaction mixtures crystallized into nanoscale zeolites are considered in detail, as well as the effect of crystallization conditions on the change in the dispersity of zeolite crystals.
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effect of the degree of zeolite recrystallization into micro mesoporous materials on their catalytic properties in Petroleum refining and Petroleum Chemistry processes
Petroleum Chemistry, 2016Co-Authors: O A Ponomareva, E E Knyazeva, S V Konnov, I A Kasyanov, I I IvanovaAbstract:It has been shown that by varying the degree of recrystallization of zeolites, it is possible to obtain mesostructured zeolites (RZEO-1), micro–mesoporous nanocomposites (RZEO-2), and mesoporous materials with zeolite fragments (RZEO-3). The main features of the effect of recrystallization degree of MOR, BEA, and FER zeolites on their catalytic properties in the processes of cracking of 1,3,5-triisopropylbenzene, skeletal isomerization of butene-1, hydroisomerization of n-alkanes, alkylation of benzene with dodecene-1, alkylation of naphthalene with cyclohexene, and disproportionation of cumene have been revealed. It has been found that each type of catalytic reaction requires a micro–mesoporous catalyst with an optimal degree of recrystallization. Zeolites RZEO-1 are the most efficient in the reactions that require strong acidity; zeolites RZEO-2 are the most promising in consecutive reactions and reactions that proceed in pore mouths; and RZEO-3 are optimal for transformations of bulky molecules.
Paul Oconnor - One of the best experts on this subject based on the ideXlab platform.
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deactivation and testing of hydrocarbon processing catalysts developed from a symposium sponsored by the division of Petroleum Chemistry inc at th 210th national meeting of the american chemical society chicago illinois august 20 25 1995
1996Co-Authors: Paul Oconnor, Toru Takatsuka, Geoffrey L WooleryAbstract:Provides a broad review of state-of-the-art methodology of catalyst deactivation and testing in hydrocarbon conversion processes. This work examines deactivation mechanisms for the major classes of heterogeneous catalysts used in the petrochemical industry. It provides insights on how to create effective, small-scale laboratory tests, and how to simulate catalyst deactivation in commercial processes. It also discusses modelling of catalyst deactivation.
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fluid catalytic cracking iii materials and processes developed from a symposium sponsored by the division of Petroleum Chemistry inc at the 206th national meeting of the american chemical society chicago illinois august 22 27 1993
1994Co-Authors: Mario L Occelli, Paul OconnorAbstract:Role of Carbocations in Hydrocarbon Reactions Catalyzed by Strong Acids Role of Hydrogen Transfer in Isobutene-Isobutane Selectivities Benzene Levels in Fluid Catalytic Cracking Gasoline Deep Catalytic Cracking Process for Light-Olefins Production Comparison of Laboratory and Commercial Results of ZSM-5 Additives in a Fluid Catalytic Cracking Unit Effect of Secondary Porosity on Gas-Oil Cracking Activity Investigations of Mesopore Formation: Evolution of Nonframework Aluminum Species During Hydrothermal Dealumination of Ultrastable Y Catalysts Catalyst Fouling by Coke from Vaccum Gas Oil in Fluid Catalytic Cracking Reactors Coke Formation in Reactor Vapor Lines of Fluid Catalytic Cracking Units: A Review with some New Insights Limitations of the Microactivity Test for Comparing New Potential Cracking Catalysts with Actual Ultrastable-Y-Based Samples Development of a New Coefficient To Predict Feedstock Cracking Breakthrough in Microactivity Test Effluent Analysis: Detailed Analytical Characterization of Gasolines, Light-Cycle Oil, and bottom Cuts Solid-State Interaction Between NaY Zeolite and Various Oxides Interactions in Alumina-Based Iron-Vanadium Catalysts under High-Temperature Oxidation Conditions Activity and Deactivation in Catalytic Cracking Studied by Measurement of Adsorption During Reaction Effect of Support Texture on Pt Dispersion and CO-Oxidation Catalyst in Fluid Catalytic Cracking Scanning Electron Microscopy-Energy-Dispersive X-ray Analysis of Nickel Migration in Model Fluid Cracking Catalysts Coking and Regeneration of Fluid Cracking Catalysts by '^2]9Xe and ^2]7Al Nuclear Magnetic Resonance Spectroscpy Fluid Cracking Catalyst ZSM-5 Additive Performance at Overcracking Mode Atomic Force Microscopy Examination of the Topography of a Fluid Cracking Catalyst Surface Kinetics of n-Decane Cracking at Very Short Times on Stream High Activity, High Stability Fluid Cracking Catalyst SO[x Reduction Agent via Novel Processing Principles Resid Cracking Catalysts Impact of Additive Usage in Distillate Fluid Catalytic Cracking Operation Fluid Cracking Catalyst Performance and Development: Now and in the Future
E A Katsman - One of the best experts on this subject based on the ideXlab platform.
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supported palladium nanomaterials as catalysts for Petroleum Chemistry 2 kinetics and specific features of the mechanism of selective hydrogenation of phenylacetylene in the presence of carbon supported palladium nanocatalyst
Petroleum Chemistry, 2015Co-Authors: A S Berenblyum, H A Alwadhaf, E A KatsmanAbstract:The selective hydrogenation of phenylacetylene (PhA) into styrene (St) in the presence of a palladium nanocatalyst has been investigated. Salient features of this reaction have been revealed, such as independence of the PhA hydrogenation and St hydrogenation (after exhaustion of PhA) rates from the PhA and St concentrations, respectively; their nearly first-order dependence on the hydrogen pressure; and the first order in catalyst loading. The experimental results obtained according to a special plan have been processed using computer programs for various reaction mechanisms. It has been found that adequate description is achieved for the only scheme involving the adsorption one to two PhA and/or St molecules and one to two hydrogen molecules on the active site of the same type. The presence of one hydrogen molecule on the active site leads to the hydrogenation of PhA to St or St to ethylbenzene (EB). In the presence of two adsorbed hydrogen molecules, PhA is selectively hydrogenated to St and nonselectively hydrogenated directly to EB. It has been shown that the nature of the selectivity of the palladium catalyst is determined by the thermodynamics of competitive adsorption of PhA and St. The activation energies of the individual steps of the process have been determined.
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supported palladium nanomaterials as catalysts for Petroleum Chemistry 1 specifics of palladium diacetate reduction with hydrogen on silica gel in catalyst synthesis
Petroleum Chemistry, 2014Co-Authors: A S Berenblyum, H A Alwadhaf, E A Katsman, R S Shamsiev, A A KorolevaAbstract:The reduction reaction of Pd(II) diacetate, a precursor in nanocatalyst synthesis, with molecular hydrogen on silica gel has been studied. A kinetic model involving the autocatalytic mechanism of Pd(II) reduction to Pd(0) and adequately describing the experimental data has been proposed. Similarities and dissimilarities in the mechanism of this process on silica gel and carbon have been revealed. On the basis of quantum-chemical simulation data, it has been suggested that the differences are due to both a high bond energy of the precursor with the support and modifications in geometry of various Pd(II) diacetate species adsorbed on the surface. The controllable reduction of the precursor makes it possible to manufacture materials with a metal particle size of 1.7–2.8 nm according to transmission electron microscopy data. The materials catalyze the reaction of phenylacetylene hydrogenation to styrene with a high activity and selectivity at 25°C and 1 atm of hydrogen.
Lyubov K. Altunina - One of the best experts on this subject based on the ideXlab platform.
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Effect of treatment of an injection well of the Usinskoye oilfield with acid GBK composition on the oil recovery and properties of produced fluids
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019, 2019Co-Authors: V. S. Ovsyannikova, E. A. Rozhdestvensky, L. A. Strelets, I. V. Kuvshinov, Lyubov K. AltuninaAbstract:An acid composition of prolonged-action based on an inorganic acid adduct, a polyol and a surfactant has been developed at the Institute of Petroleum Chemistry, SB RAS. Introduced into the injection well, the composition exerts a prolonged positive effect on the oil recovery in the area of its influence. The increase in oil production rates and decrease in water cuts are accompanied by changes in viscosity of extracted oil and mineral composition of produced water. The appearance of components of a new composition and products of its hydrolysis in the produced fluids suggests the inclusion of still virgin zones, changes in filtration flows, and desorption of heavy-oil components from reservoir rock after its break-up.An acid composition of prolonged-action based on an inorganic acid adduct, a polyol and a surfactant has been developed at the Institute of Petroleum Chemistry, SB RAS. Introduced into the injection well, the composition exerts a prolonged positive effect on the oil recovery in the area of its influence. The increase in oil production rates and decrease in water cuts are accompanied by changes in viscosity of extracted oil and mineral composition of produced water. The appearance of components of a new composition and products of its hydrolysis in the produced fluids suggests the inclusion of still virgin zones, changes in filtration flows, and desorption of heavy-oil components from reservoir rock after its break-up.
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Effect of the acid GBK composition and reservoir microflora on the displacement efficiency and composition of the oil from the Usinskoye oilfield
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019, 2019Co-Authors: A. G. Shcherbakova, V. S. Ovsyannikova, L. I. Svarovskaya, Lyubov K. AltuninaAbstract:An acid composition based on an adduct of an inorganic acid, a polyol and a surfactant has been developed at the Institute of Petroleum Chemistry, SB RAS. The composition, which includes glycerin and urea, stimulates the growth and hydrocarbon-oxidizing activity of the reservoir microflora under conditions of simulated biodegradation and physical modeling of oil displacement process. Biodegradation results in an increase in the proportion of oxygen-containing and aromatic structures, while the proportion of cyclic hydrocarbons in the group composition has decreased. The changes in the molecular mass distribution of mono, bi- and triaromatic hydrocarbons were revealed. The combined use of the acid composition and the hydrocarbon-oxidizing microflora provided an increased displacement of oil from models of core samples with low and high permeability.An acid composition based on an adduct of an inorganic acid, a polyol and a surfactant has been developed at the Institute of Petroleum Chemistry, SB RAS. The composition, which includes glycerin and urea, stimulates the growth and hydrocarbon-oxidizing activity of the reservoir microflora under conditions of simulated biodegradation and physical modeling of oil displacement process. Biodegradation results in an increase in the proportion of oxygen-containing and aromatic structures, while the proportion of cyclic hydrocarbons in the group composition has decreased. The changes in the molecular mass distribution of mono, bi- and triaromatic hydrocarbons were revealed. The combined use of the acid composition and the hydrocarbon-oxidizing microflora provided an increased displacement of oil from models of core samples with low and high permeability.
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Thermotropic Composition with Two Gelation Agent for Water Shut-off and Enhance of Oil Recovery
79th EAGE Conference and Exhibition 2017, 2017Co-Authors: V.a. Kuvshinov, I. V. Kuvshinov, Lyubov K. Altunina, L. A. Stasyeva, V. V. KozlovAbstract:This work presents results of laboratory studies and field tests of thermotropic composition for EOR and water shut-off, with two simultaneously acting gelation agents, polymer and inorganic, developed at Institute of Petroleum Chemistry SB RAS. The application area of this composition is oilfields developed by thermal flooding and cyclic-steam stimulated oil production wells. The composition forms in-situ “gel-in-gel” system with improved structural-mechanical properties, using reservoir or carrier fluid (steam) heat for gelation. The gel blocks water and steam breakthrough into producing wells and redistribute fluid flows, thus increases oil recovery factor. The results of laboratory studies and pilot tests proving technology effectiveness are presented.
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Influence of physical and chemical methods of enhanced oil recovery in formation microflora and properties of crude oil
2015Co-Authors: A. G. Shcherbakova, V. S. Ovsyannikova, Lyubov K. Altunina, L. I. Svarovskaya, D. A. Filatov, D. I. ChuikinaAbstract:The results of the analyzes of crude oil and produced water from wells in the areas of pilot testing of new flow deflection and oil-displacing Compounds developed in the Institute of Petroleum Chemistry SB RAS. It was found that changes in the properties and Compound of the oil and water mainly occur in the redistribution of filtration flows and integration in the development of the previously unwashed areas, as well as in washing off the residual heavy oil from the reservoir rock, and in some wells - due to formation biocenosis, contributing to desorption of oil from the rock.