A Review on the Reaction Mechanism of Hydrodesulfurization and Hydrodenitrogenation in Heavy Oil Upgrading

Hydrodesulfurization reaction, as the last step of hydrothermal cracking reaction, is of great significance for the reduction of viscosity and desulfurization of heavy oil. Based on Density Functional Theory and using Dmol3 module of Materials Studio, this research simulated the adsorption and hydrodesulfurization of thiophene on Ni2P (001) surface, and discussed the hydrodesulfurization reaction mechanism of thiophene on Ni2P (001) surface. It was found that the direct hydrodesulfurization of thiophene had more advantages than the indirect hydrodesulfurization of thiophene. Finally, the optimal reaction path was determined: C4H4S+H2→C4H6.

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Renewable energy integration with hot compressed water in heavy oil upgrading: A practice toward sustainability

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.130268 ◽

2021 ◽

pp. 130268

Author(s):

Morteza Hosseinpour ◽

M. Soltani ◽

Jatin Nathwani

Keyword(s):

Renewable Energy ◽

Heavy Oil ◽

Energy Integration ◽

Renewable Energy Integration ◽

Heavy Oil Upgrading ◽

Hot Compressed Water

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Improved Catalysts for Heavy Oil Upgrading Based on Zeolite Y Nanoparticles Encapsulated Stable Nanoporous Host

10.2172/901638 ◽

2006 ◽

Author(s):

Conrad Ingram ◽

Mark Mitchell

Keyword(s):

Heavy Oil ◽

Zeolite Y ◽

Heavy Oil Upgrading

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Refinery bitumen and domestic unconventional heavy oil upgrading in supercritical water

The Journal of Supercritical Fluids ◽

10.1016/j.supflu.2019.104569 ◽

2019 ◽

Vol 152 ◽

pp. 104569 ◽

Cited By ~ 3

Author(s):

Ramazan Oğuz Canıaz ◽

Serhat Arca ◽

Muzaffer Yaşar ◽

Can Erkey

Keyword(s):

Supercritical Water ◽

Heavy Oil ◽

Heavy Oil Upgrading

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Impacts of Kinetics Scheme Used To Simulate Toe-to-Heel Air Injection (THAI) in Situ Combustion Method for Heavy Oil Upgrading and Production

ACS Omega ◽

10.1021/acsomega.9b03661 ◽

2020 ◽

Vol 5 (4) ◽

pp. 1938-1948

Author(s):

Muhammad Rabiu Ado

Keyword(s):

Heavy Oil ◽

Combustion Method ◽

Air Injection ◽

In Situ Combustion ◽

Heavy Oil Upgrading

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Hydrogenation and Dehydrogenation of Tetralin and Naphthalene to Explore Heavy Oil Upgrading Using NiMo/Al2O3 and CoMo/Al2O3 Catalysts Heated with Steel Balls via Induction

Catalysts ◽

10.3390/catal10050497 ◽

2020 ◽

Vol 10 (5) ◽

pp. 497 ◽

Cited By ~ 3

Author(s):

Abarasi Hart ◽

Mohamed Adam ◽

John P. Robinson ◽

Sean P. Rigby ◽

Joseph Wood

Keyword(s):

Heavy Oil ◽

Coke Formation ◽

Plug Flow ◽

Fixed Bed ◽

Effect Of Temperature ◽

Catalytic Upgrading ◽

Heavy Oil Upgrading ◽

Steel Balls ◽

Surrounding Fluid

This paper reports the hydrogenation and dehydrogenation of tetralin and naphthalene as model reactions that mimic polyaromatic compounds found in heavy oil. The focus is to explore complex heavy oil upgrading using NiMo/Al2O3 and CoMo/Al2O3 catalysts heated inductively with 3 mm steel balls. The application is to augment and create uniform temperature in the vicinity of the CAtalytic upgrading PRocess In-situ (CAPRI) combined with the Toe-to-Heel Air Injection (THAI) process. The effect of temperature in the range of 210–380 °C and flowrate of 1–3 mL/min were studied at catalyst/steel balls 70% (v/v), pressure 18 bar, and gas flowrate 200 mL/min (H2 or N2). The fixed bed kinetics data were described with a first-order rate equation and an assumed plug flow model. It was found that Ni metal showed higher hydrogenation/dehydrogenation functionality than Co. As the reaction temperature increased from 210 to 300 °C, naphthalene hydrogenation increased, while further temperature increases to 380 °C caused a decrease. The apparent activation energy achieved for naphthalene hydrogenation was 16.3 kJ/mol. The rate of naphthalene hydrogenation was faster than tetralin with the rate constant in the ratio of 1:2.5 (tetralin/naphthalene). It was demonstrated that an inductively heated mixed catalytic bed had a smaller temperature gradient between the catalyst and the surrounding fluid than the conventional heated one. This favored endothermic tetralin dehydrogenation rather than exothermic naphthalene hydrogenation. It was also found that tetralin dehydrogenation produced six times more coke and caused more catalyst pore plugging than naphthalene hydrogenation. Hence, hydrogen addition enhanced the desorption of products from the catalyst surface and reduced coke formation.

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