Saturates and aromatics characterization in heavy crude oil upgrading using Ni–Co/γ-Al<sub>2</sub>O<sub>3</sub> catalysts

Avbenake, Onoriode P.; Al‐Hajri, Rashid; Jibril, Baba Y.

doi:10.1080/10916466.2020.1779743

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…Regarding the oxidation parameter, it increases in all the samples relative to the base crude oil, especially at 300 ppm of molybdenum naphthenate. It is well known that catalysts act especially in the weakest bonds with heteroatoms (C–R, R: S, O), causing reactions such as oxygenation, alcoholization, and esterification. , ,74 Therefore, greater oxidation is associated with new species formation with functional groups that contain oxygen and sulfur as alcohols, ethers, esters, thioesters, thiols, and sulfoxides, among others. This allows corroborating that oxidation reactions are developed in the catalytic aquathermolysis tests carried out.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Thus, from the results, the transformation of fraction 7 can be attributed to the reactivity of resins and asphaltenes under catalytic aquathermolysis conditions, as indicated by other authors. 51,61,68 Figure 8 illustrates the general scheme of the reaction mechanism proposed in the catalytic aquathermolysis process, where it can be observed how the mechanisms are interconnected. Thus, the product of one reaction can become the raw material of another.…”

Section: Colombian Crude Oilmentioning

confidence: 99%

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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: Results and Discussionmentioning

confidence: 99%

Section: Colombian Crude Oilmentioning

confidence: 99%

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

et al. 2021

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“…Meanwhile, the sulfur content and viscosity of the samples, which were reacted in a nitrogen environment, were higher compared to that of hydrogen [47]. Moreover, the share of C7-C30 homologues in the products of catalytic upgrading of heavy oil was higher than non-catalytic thermal cracking process [47,48].…”

Section: Nanocatalystsmentioning

confidence: 94%

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

et al. 2021

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The aquathermolysis process is widely considered to be one of the most promising approaches of in-situ upgrading of heavy oil. It is well known that introduction of metal ions speeds up the aquathermolysis reactions. There are several types of catalysts such as dispersed (heterogeneous), water-soluble and oil soluble catalysts, among which oil-soluble catalysts are attracting considerable interest in terms of efficiency and industrial scale implementation. However, the rock minerals of reservoir rocks behave like catalysts; their influence is small in contrast to the introduced metal ions. It is believed that catalytic aquathermolysis process initiates with the destruction of C-S bonds, which are very heat-sensitive and behave like a trigger for the following reactions such as ring opening, hydrogenation, reforming, water–gas shift and desulfurization reactions. Hence, the asphaltenes are hydrocracked and the viscosity of heavy oil is reduced significantly. Application of different hydrogen donors in combination with catalysts (catalytic complexes) provides a synergetic effect on viscosity reduction. The use of catalytic complexes in pilot and field tests showed the heavy oil viscosity reduction, increase in the content of light hydrocarbons and decrease in heavy fractions, as well as sulfur content. Hence, the catalytic aquathermolysis process as a distinct process can be applied as a successful method to enhance oil recovery. The objective of this study is to review all previously published lab scale and pilot experimental data, various reaction schemes and field observations on the in-situ catalytic aquathermolysis process.

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“…Following the range of C 7 -C 12 for gasoline, C 13 -C 14 for kerosene, C 15 -C 20 for diesel, and C 21 -C 30 for residual fuel oil, 62,63 Agbabu bitumen showed the following distribution: gasoline (27.74%), kerosene (9.2%), diesel (12.63%), and residual fuel oil (0.3%) upon pyrolysis. Ilubirin pyrolytic oil showed the following distribution: gasoline (25.85%), kerosene (6.81%), diesel (5.24%), and residual fuel oil (7.11%), Mile 2 pyrolytic oil showed the following distribution: gasoline (15.09%), kerosene (8.24%), diesel (17.67%), and residual fuel oil (2.97%), Olowo-Irele pyrolytic oil showed the following distribution: gasoline (15.68%), kerosene (9.17%), and diesel (12.85%), Orisunbare pyrolytic oil showed the following distribution: gasoline (15.02%), kerosene (8.11%), diesel (19.09%), and residual fuel oil (3.11%).…”

Section: Artificial Neural Network Modelingmentioning

confidence: 94%

Pyrolysis of Oil Sand Bitumen Using a Fixed-Bed Reactor: Process Modeling and Compositional Analysis

Ore,

Adebiyi

2023

Ind. Eng. Chem. Res.

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Saturates and aromatics characterization in heavy crude oil upgrading using Ni–Co/γ-Al₂O₃ catalysts

Cited by 11 publications

References 10 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

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

Pyrolysis of Oil Sand Bitumen Using a Fixed-Bed Reactor: Process Modeling and Compositional Analysis

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Saturates and aromatics characterization in heavy crude oil upgrading using Ni–Co/γ-Al2O3 catalysts

Cited by 11 publications

References 10 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

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

Pyrolysis of Oil Sand Bitumen Using a Fixed-Bed Reactor: Process Modeling and Compositional Analysis

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Saturates and aromatics characterization in heavy crude oil upgrading using Ni–Co/γ-Al₂O₃ catalysts