Effect of temperature on bitumen conversion in a supercritical water flow

Fedyaeva, O. N.; Shatrova, Anna V.; Vostrikov, A. A.

doi:10.1016/j.supflu.2014.10.009

Cited by 28 publications

(12 citation statements)

References 33 publications

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“…The heavy components from the decomposition will accumulate at the bottom of the reactor and be converted into lighter hydrocarbons as the temperature increases. A related study showed almost no coke generated from heavy oil upgrading in a counter-current SCW flow reactor [61].…”

Section: Operation Modementioning

confidence: 99%

“…Compared with the batch and semi-batch reactors, the advantage of continuous reactor is mainly reflected in the extraction and fraction of hydrocarbons. For bitumen upgrading in SCW, the recombination of the hydrocarbon radicals generated during hydrolysis can be prevented by SCW flow, due to its timely and effective extraction and separation, which greatly reduce the formation of coke and increase the liquid hydrocarbon yield [43,61].…”

Section: Bitumenmentioning

confidence: 99%

“…The focus of the controversy is whether the SCW takes part in the transformation of hydrocarbons. A part of previous literature considered SCW as a reactant [59,61,[67][68][69][70], which participated the transformation of hydrocarbons through the direct H-abstraction (H• and HO• donation, known as free a radical mechanism) or hydrolysis (H + and HO − donation, known as an ionic mechanism), while some just regarded SCW as a solvent [35], which only had some physical effects on the transformation of hydrocarbons [71].…”

Section: Mechanisms Of Hydrocarbons Transformationmentioning

confidence: 99%

“…Olukcu et al [38] suggested that the absence of n-alkenes-1 and the appearance of alcohols in the product might occur due to OH transferring from water to organic free radicals generated from an oil shale during SCW extraction. Fedyaeva et al [61] implied that water took part in the upgrading of bitumen in an upflow reactor with the evidence of the appearance of oxygen and increasing the amount of hydrogen in the products and conversion residue. Kida et al [75] demonstrated that water was a reactant in the desulfurization process of hexyl sulfide and generated the pentane and CO + CO2 from its reaction with intermediates of hexyl sulfide decomposition.…”

Section: Mechanisms Of Hydrocarbons Transformationmentioning

confidence: 99%

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A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Yan

Xiao

2015

Energies

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Abstract:With the growing demand for energy and the depletion of conventional crude oil, heavy oil in huge reserve has attracted extensive attention. However, heavy oil cannot be directly refined by existing processes unless they are upgraded due to its complex composition and high concentration of heteroatoms (N, S, Ni, V, etc.). Of the variety of techniques for heavy oil upgrading, supercritical water (SCW) is gaining popularity because of its excellent ability to convert heavy oil into valued, clean light oil by the suppression of coke formation and the removal of heteroatoms. Based on the current status of this research around the world, heavy oil upgrading in SCW is summarized from three aspects: Transformation of hydrocarbons, suppression of coke, and removal of heteroatoms. In this work, the challenge and future development of the orientation of upgrading heavy oil in SCW are pointed out.

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Section: Operation Modementioning

confidence: 99%

Section: Bitumenmentioning

confidence: 99%

Section: Mechanisms Of Hydrocarbons Transformationmentioning

confidence: 99%

Section: Mechanisms Of Hydrocarbons Transformationmentioning

confidence: 99%

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A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Yan

Xiao

2015

Energies

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“…Проведение процесса в проточном режиме по сравнению со статическим может приво-дить к снижению выхода кокса до нулевого [83], благодаря предотвращению рекомби-нации образующихся в результате термического крекинга углеводородных радикалов -предшественников кокса за счет разрежения среды и диспергирования высококипящих фракций с последующей экстракцией образующихся продуктов крекинга потоком СКВ [84,85].…”

Section: облагораживание реального сырья в среде сверхкритической водыunclassified

Heavy Oil Upgrading in the Presence of Water

Елецкий¹,

Sosnin²,

Zaikina³

et al. 2017

J. Sib. Fed. Univ. Chem.

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Inference of reaction kinetics for supercritical water heavy oil upgrading with a two‐phase stirred reactor model

Raghavan

Ghoniem

2021

AIChE Journal

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We present the development and application of a two‐phase stirred reactor model for heavy oil upgrading in the presence of supercritical water (SCW), with coupled phase‐specific thermolysis reaction kinetics and multicomponent hydrocarbon–water phase equilibrium. We demonstrate the inference of oil and water phase kinetics parameters for a compact lumped reaction kinetics scheme through the application of this model to two different sets of batch reactor experiments reported in the literature. We infer that, although SCW can suppress the formation of newer polynuclear aromatics (PNA) from distillate range species, it is broadly ineffective in deterring the combination of pre‐existing PNA fragments in the oil feed. Quantification of the conversion to distillate liquids before the onset of coke formation helps arrive at a clear conclusion on whether the use of SCW in the batch reactor leads to better product outcomes for different oil feeds and operating conditions.

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Effect of temperature on bitumen conversion in a supercritical water flow

Cited by 28 publications

References 33 publications

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Heavy Oil Upgrading in the Presence of Water

Inference of reaction kinetics for supercritical water heavy oil upgrading with a two‐phase stirred reactor model

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