Thermocatalytic cracking of the natural bitumens of Kazakhstan

Ongarbayev, Yerdos; Головко, А. К.; Krivtsov, E. B.; Imanbayev, Yerzhan; Tuleutaev, B.K.; Mansurov, Z. A.

doi:10.3103/s0361521916020063

Cited by 11 publications

(11 citation statements)

References 2 publications

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“…In such reopen reservoirs and areas of active water exchange a light fractions were lost and residual oil components were affected by various secondary processes, which led to the increase of the content of high-molecular weight components and the formation of inactive extra Available on line at www.shd.org.rs/JSCS/ _________________________________________________________________________________________________________________________ (CC) 2017 SCS TRANSFORMATION OF TAR-ASPHALTENE COMPONENTS 1065 heavy oil and solid bitumen. 6,7 Bitumen deposits occur in them in small sized lens and interlayers. Natural bitumen was extracted from oil sand by Soxhlet's method using a chloroform as the solvent.…”

Section: Methodsmentioning

confidence: 99%

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High temperature transformation of tar-asphaltene components of oil sand bitumen

Imanbayev

Ongarbayev

Krivtsov

et al. 2017

JSCS

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Transformations of high-molecular-weight compounds of oil sand natural bitumen under the heat treatment were studied in this work. For that purpose the natural bitumen isolated from oil sand taken from the Beke field (Kazakhstan) was used as a substrate. Thermal processing of natural bitumen leads to a general change in the chemical composition of components and to an increase in the output of certain fractions. The contents of oil, tar and asphaltenes were determined and the elemental composition of tar-asphaltene compounds was evaluated. Molecular structures of the tar and asphaltene components of natural bitumen before and after cracking have been defined from the data of elemental analysis, NMR spectroscopy and molecular weight. The high molecular compounds were presented as giant molecules containing small aromatic islands some of which were linked by aliphatic chains, that was proved by infrared spectroscopy.

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Section: Methodsmentioning

confidence: 99%

“…The cracking of bitumen and study of the cracking products were described in detail elsewhere. 6 The molecular weights of tars and asphaltenes of natural bitumen and their cracking products were measured in naphthalene by cryoscopic method developed in the Institute of Petroleum Chemistry using the "Krion" instrument.…”

Section: Methodsmentioning

confidence: 99%

High temperature transformation of tar-asphaltene components of oil sand bitumen

Imanbayev

Ongarbayev

Krivtsov

et al. 2017

JSCS

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“…A distinctive feature of this field is the output of bituminous sands to the ground surface. In such reopen reservoirs and areas of active water exchange was a loss of light fractions and residual oil components were affected by various supergene factors, which led to the weighting of their composition and the formation of inactive extra heavy oil and solid bitumen [6,7]. Bitumen deposits occur in them in small sized lens and inter-layers.…”

Section: Methodsmentioning

confidence: 99%

High Temperature Transformation of Tar-Asphaltene Components of Bituminous Sand Bitumen

Imanbayev¹

2017

JOJMS

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Transformations of high-molecular-weight compounds of bituminous sands natural bitumen under the heat treatment are studied. Cracking and extraction of Kazakhstan's bituminous sand bitumen were carried out. Thermal processing of natural bitumen leads to a general change in the chemical composition of components and an increase in the output of certain factions. Molecular structures of the tar and asphaltene components of natural bitumen are built from the data of elemental analysis, 1HNMR spectroscopy and molecular weight. The content of oil, tar and asphaltenes were determined and the elemental composition of tar-asphaltene compounds was evaluated. The high molecular compounds were presented as giant molecules containing small aromatic islands with some linked by aliphatic chains.

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“…The thermocatalytic conversion of heavy hydrocarbon raw materials with iron oxide and other organic radical formation additives are a promising method for the production of synthetic oil. Microspheres, which can initiate the deep destruction of high-molecular-weight components, exhibited high efficiency in the processes of cracking [1][2][3]. Organic radical formation additives allows to promotion the birth of radicals in the system, which reduces the rate of coke formation.…”

Section: Introductionmentioning

confidence: 99%

Changing the Structure of Resin-Asphaltenes Molecules in Cracking

Imanbayev

Ongarbayev

Mansurov

et al. 2017

Eurasian Chem. Tech. J.

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In the paper, structural changing of resin-asphaltene molecules in cracking process of oil sand bitumen are investigated. Cracking process to natural bitumen carried out in an open-to-air reactor, which extracted from oil sand by organic solvent. Reaction temperature was 450 °С and process duration was 60 min. The reactor was heated at a rate of 10 °C/min up to the desired temperature. Di-tert-butyl peroxide was used as radical formation additive. When limiting oxygen, it can be used catalyst molecule supplies as the oxidizer. The thermal destruction processes of heavy hydrocarbons with the catalyst make it possible to increase the yield of low boiling liquid products with the formation of coke and gas as by-products. High temperature leads to increase the oil content, and decrease the total resinasphaltene components in bitumen. Monte Carlo method used for construction the molecular structure of resin-asphaltene components. The calculations data determined the most stable conformation of resins and asphaltenes molecules, that the stability of the molecules affect structural characteristics such as the number of structural blocks, their size and spatial arrangement of atoms with respect to each other. Microscopic images showed that the asphaltenes have around 40‒50 nm of particle size, which large monolithic switching, weakly focused on a major surface, provided with amorphous carbon.

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Thermocatalytic cracking of the natural bitumens of Kazakhstan

Cited by 11 publications

References 2 publications

High temperature transformation of tar-asphaltene components of oil sand bitumen

High temperature transformation of tar-asphaltene components of oil sand bitumen

High Temperature Transformation of Tar-Asphaltene Components of Bituminous Sand Bitumen

Changing the Structure of Resin-Asphaltenes Molecules in Cracking

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