Study on ex-situ and in-situ bentonite synergistic catalytic mechanisms in heavy oil aquathermolysis reaction

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00382986" target="_blank" >RIV/68407700:21110/25:00382986 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.molliq.2025.127391" target="_blank" >https://doi.org/10.1016/j.molliq.2025.127391</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.molliq.2025.127391" target="_blank" >10.1016/j.molliq.2025.127391</a>

Result language

angličtina

Original language name

Study on ex-situ and in-situ bentonite synergistic catalytic mechanisms in heavy oil aquathermolysis reaction

Original language description

In-situ catalytic aquathermolysis has become an important method for heavy oil recovery, but the mechanism of action of ex-situ catalysts in the reservoir environment is not yet clear. This work investigates the mechanism of synergistic catalysis of heavy oil aquathermolysis reaction using ex-situ catalysts and in-situ minerals in reservoirs. In the presence of hydrogen donors, the effects of oleic acid salt ex-situ catalysts containing Mn, Co, Ni, Cu, Zn, Cr, and Fe, reservoir minerals (represented by clay), and oleic acid salt and reservoir mineral composites on heavy oil aquathermolysis were evaluated separately. Comparative analysis shows that the reaction effect of oleate-clay composite catalysis is better than the other two, and the viscosity of heavy oil is the lowest after the reaction. This indicates that the ex-situ catalyst will synergistically catalyze the aquathermolysis reaction of heavy oil with reservoir minerals after entering the reservoir. The results show that the properties of heavy crude oil are significantly improved, with a viscosity reduction rate of up to 84 % and a maximum pour point reduction of 17.0 °C. The light components in heavy oil increase significantly, while the content of heavy components decreases. The type and content of polar components in the aqueous phase changes after the reaction, indicating that the reaction can promote the conversion of polar components in heavy oil into water-soluble substances, thereby removing them from heavy oil and improving its quality. Based on this understanding, a series of model compounds were selected according to the structure of resin and asphaltene in heavy oil, and the mechanism of this aquathermolysis reaction was explored, providing rich experimental and theoretical basis for related research in this field.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Molecular Liquids

ISSN

0167-7322

e-ISSN

1873-3166

Volume of the periodical

427

Issue of the periodical within the volume

127391

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

14

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-105000216166