Development of a simple and efficient oil-soluble nanocatalytic system for aquathermolysis upgrading of heavy crude oil

Kholmurodov, Temurali; Tajik, Arash; Farhadian, Abdolreza; Mirzayev, Oybek; Tahay, Pooya; Vakhin, Аlexey V.; Rashidi, Alimorad

doi:10.1016/j.fuel.2023.129223

Cited by 13 publications

(2 citation statements)

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“…Nickel nanoparticles were the most active catalyst, increasing hydrogen from 10.63 to 13.71 wt % and the estimated H/C atomic ratio from 1.52 to 2.02, confirming the occurrence of destructive hydrogenation reactions. These results agree with previous findings . Viscosity reduction during aquathermolysis is primarily due to S–S and C–S bond cleavage with sulfur release as H 2 S gas via hydrodesulfurization and likely subsequent metal oxide sulfidation.…”

Section: Resultssupporting

confidence: 92%

“…These results agree with previous findings. 35 Viscosity reduction during aquathermolysis is primarily due to S−S and C−S bond cleavage with sulfur release as H 2 S gas via hydrodesulfurization and likely subsequent metal oxide sulfidation. Copper acetate showed the highest hydrodesulfurization performance, reducing the sulfur content from 5.55 to 3.95 wt %.…”

Section: Elemental Composition (Chns) Analysismentioning

confidence: 99%

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Efficient Heavy Oil Upgrading with Water-Soluble Nickel and Copper Acetate Catalysts

Aliev,

Abdelsalam,

Lapuk

et al. 2024

Ind. Eng. Chem. Res.

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This study presents a groundbreaking approach to heavy oil upgrading using water-soluble nickel acetate as a precatalyst, marking a shift from traditional oil-soluble catalysts. We demonstrate that nickel and copper acetates significantly enhance aquathermolysis, reducing the viscosity of heavy oil by almost 58% and the high-molecular-weight fractions from 38.3 to 23.5 wt % while increasing the lighter fractions from 61.7 to 76.5 wt %. The catalytic action of nickel and copper acetates facilitates the structural and compositional transformation of heavy oil, evidenced by the increased H/C atomic ratio and 30% reduction in the initial boiling point. Further, these catalysts yield an increase in light distillate production and promote the formation of stable free radicals, indicating a higher degree of hydrocarbon decomposition. Analytical techniques, including thermogravimetric analysis, kinetic analysis, X-ray diffraction, and scanning electron microscopy, confirm the effective decomposition of nickel and copper acetates into active nickel and copper species, predominantly nanoparticles smaller than 58 nm. The study underlines the potential of water-soluble catalysts such as nickel and copper acetates to enhance steam-based oil recovery and upgrading processes, offering a cost-effective and environmentally friendlier alternative to conventional methods. The ongoing research promises to solidify the role of catalysts in sustainable energy production.

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Section: Resultssupporting

confidence: 92%

Section: Elemental Composition (Chns) Analysismentioning

confidence: 99%