Ethanol enhanced aquathermolysis of heavy oil catalyzed by a simple Co(II) complex at low temperature

Chen, G.; Yuan, Weihua; Bai, Yun; Zhao, Wenhui; Gu, Xuehong; Zhang, J.; Jeje, Ayodeji

doi:10.1134/s0965544117050036

Cited by 19 publications

(6 citation statements)

References 13 publications

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“…The parameters according to the operating window of the conditions were established. Test conditions such as temperature, pressure, and reaction time were established, according to the process operating window and the applied parameters in other studies. − …”

Section: Methodsmentioning

confidence: 99%

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

et al. 2021

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In this work, the catalytic aquathermolysis process of a Colombian heavy crude oil was studied. Reactivity tests were conducted in a microbatch reactor at 270 °C and saturation pressure of 5.5 MPa, during 66 h, using iron and molybdenum naphthenates in concentrations of 50−300 ppm as catalysts. The use of these catalysts reduced the gas yield from 1% to 4.2% w/w, the viscosity from 10% to 52.3% with iron naphthenate, and from 11.6% to 31.4% with molybdenum naphthenate. Crudes subjected to catalytic aquathermolysis increased their API gravity from 1.1 to 2.5 and 0.5 to 1.8 units, showing a significant decrease in complex fractions with boiling points above 340 °C and conversions in the order of 7% and 8% with respect to the precursors of molybdenum and iron naphthenates. Unlike other studies, the changes in the physical properties were correlated with changes in the chemical structure by ATR-FTIR spectroscopy. The average molecular parameters showed that the greatest differences with respect to the base crude oil were the length of the alkyl chains, the aromaticity, and the sulfurization. Results indicate different characteristics from the catalysts being studied, with iron naphthenate yielding better favorable effects in the change of the physicochemical properties of the improved crude oils. The experimental methodology proposed in this work indicates that the catalytic aquathermolysis process is a recovery method that allows for improving the properties of the crude oils, under reservoir conditions, due to the formation of products of smaller size and molecular weight.

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Section: Methodsmentioning

confidence: 99%

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

et al. 2021

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“…Laboratory and field catalytic aquathermolysis tests have been conducted on various heavy crude oils, especially from China Liaohe fields [66,134]. The applicable catalysts are divided into oil-soluble catalysts and water-soluble [135]. An array of transition metal-based oil-soluble catalysts has been reported in the literature [61,136].…”

Section: Aquathermolysismentioning

confidence: 99%

Recent Approaches, Catalysts and Formulations for Enhanced Recovery of Heavy Crude Oils

Gaya

2021

Period. Polytech. Chem. Eng.

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Crude oil deposits as light/heavy form all over the world. With the continued depletion of the conventional crude and reserves trending heavier, the interest to maximise heavy oil recovery continues to emerge in importance. Ordinarily, the traditional oil recovery stages leave behind a large amount of heavy oil trapped in porous reservoir structure, making the imperative of additional or enhanced oil recovery (EOR) technologies. Besides, the integration of downhole in-situ upgrading along with oil recovery techniques not only improves the efficiency of production but also the quality of the produced oil, avoiding several surface handling costs and processing challenges. In this review, we present an outline of chemical agents underpinning these enabling technologies with a focus on the current approaches, new formulations and future directions.

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“…It is currently very promising for heavy oil mining. After years of accumulated research, this group has also achieved results in the selection and preparation of catalysts in heavy oil catalytic hydrothermal cracking technology [6][7][8][9][10]. Considering the heavy oil exploitation environment, carbon dioxide flooding and water flooding are difficult to achieve; so chemical flooding has become a good choice [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of barium alkylbenzene sulfonate and its behavior as a flow improver for crude oil

Zhou¹,

Zhang²,

Fu-tian³

et al. 2021

Comptes Rendus. Chimie

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The low flow characteristics of heavy oil have brought many challenges to its exploitation. Looking for a cost-effective crude oil flow improver to reduce the viscosity of heavy oil is currently the most important challenge. Small-molecule crude oil flow improvers meet the above requirements and become an ideal target for oilfield heavy oil production. In this article, three kinds of barium salts of alkylbenzene sulfonates with different lengths of alkyl chains were synthesized from alkylbenzene sulfonic acid and barium hydroxide. Among them, the viscosity reduction effect of barium dodecylbenzenesulfonate (BaDBS) is best as the dosage is 900 mg/L, the viscosity reduction rate is 89.0%, and the pour point is reduced by 5°C. Optical microscopy revealed the eutectic effect of crude oil flow improver and saturated hydrocarbon in heavy oil. FTIR and DSC were used to research the mechanism of small-molecule crude oil flow improver to reduce the viscosity of heavy oil.

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Ethanol enhanced aquathermolysis of heavy oil catalyzed by a simple Co(II) complex at low temperature

Cited by 19 publications

References 13 publications

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

Recent Approaches, Catalysts and Formulations for Enhanced Recovery of Heavy Crude Oils

Synthesis of barium alkylbenzene sulfonate and its behavior as a flow improver for crude oil

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