scholarly journals Characteristics of Vanadium Removal and Coke Formation Using Supercritical Water for Heavy Oil Upgrading

2011 ◽  
Vol 54 (2) ◽  
pp. 96-102
Author(s):  
Hirokazu Takahashi ◽  
Nobuyuki Hokari ◽  
Osami Yokota ◽  
Kouji Nishida ◽  
Akinori Hayashi ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Heavy Oil ◽  
Coke Formation ◽  
Heavy Oil Upgrading

scholarly journals Effective Demetalization and Suppression of Coke Formation Using Supercritical Water Technology for Heavy Oil Upgrading

2008 ◽  
Vol 51 (5) ◽  
pp. 309-314 ◽  
Author(s):  
Shinsuke Kokubo ◽  
Koji Nishida ◽  
Akinori Hayashi ◽  
Hirokazu Takahashi ◽  
Osami Yokota ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Heavy Oil ◽  
Coke Formation ◽  
Heavy Oil Upgrading

Refinery bitumen and domestic unconventional heavy oil upgrading in supercritical water

2019 ◽  
Vol 152 ◽  
pp. 104569 ◽  
Author(s):  
Ramazan Oğuz Canıaz ◽  
Serhat Arca ◽  
Muzaffer Yaşar ◽  
Can Erkey
Keyword(s):  
Supercritical Water ◽  
Heavy Oil ◽  
Heavy Oil Upgrading

scholarly journals 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 ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 497 ◽  
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.

Kinetics of extra-heavy oil upgrading in supercritical water with and without zinc nitrate using the phase separation kinetic model

2020 ◽  
Vol 165 ◽  
pp. 104961
Author(s):  
Seungjae Sim ◽  
Won Bae Kong ◽  
Jonghyeon Kim ◽  
Jimoon Kang ◽  
Hwi-Sung Lee ◽  
...  
Keyword(s):  
Phase Separation ◽  
Kinetic Model ◽  
Supercritical Water ◽  
Heavy Oil ◽  
Zinc Nitrate ◽  
Heavy Oil Upgrading ◽  
Kinetics Of

Heavy oil upgrading at oxidation of activated carbon by supercritical water-oxygen fluid

2017 ◽  
Vol 126 ◽  
pp. 55-64 ◽  
Author(s):  
Oxana N. Fedyaeva ◽  
Vladimir R. Antipenko ◽  
Anatoly A. Vostrikov
Keyword(s):  
Activated Carbon ◽  
Supercritical Water ◽  
Heavy Oil ◽  
Water Oxygen ◽  
Heavy Oil Upgrading

Co-pyrolysis of heavy oil and low density polyethylene in the presence of supercritical water: The suppression of coke formation

2014 ◽  
Vol 118 ◽  
pp. 49-54 ◽  
Author(s):  
Xue-Cai Tan ◽  
Chun-Chun Zhu ◽  
Qing-Kun Liu ◽  
Tian-Yi Ma ◽  
Pei-Qing Yuan ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Heavy Oil ◽  
Coke Formation ◽  
Low Density Polyethylene ◽  
Low Density

scholarly journals Inference of Reaction Kinetics for Supercritical Water Heavy Oil Upgrading with a Two-phase Stirred Reactor Model

2021 ◽  
Author(s):  
Ashwin Raghavan ◽  
Ping He ◽  
Ahmed Ghoniem
Keyword(s):  
Reaction Kinetics ◽  
Supercritical Water ◽  
Heavy Oil ◽  
Batch Reactor ◽  
Operating Conditions ◽  
Water Phase ◽  
Reactor Model ◽  
Two Phase ◽  
Stirred Reactor ◽  
Heavy Oil Upgrading

We present the development and application of a two-phase stirred reactor model for heavy oil upgrading in the presence of supercritical water (SCW), with coupled phase-specific thermolysis reaction kinetics and multicomponent hydrocarbon water phase equilibrium. We demonstrate the inference of oil and water phase kinetics parameters for a compact lumped reaction kinetics model through the application of this model to two different sets of batch reactor experiments reported in the literature. We infer that, though SCW can suppress the formation of newer polynuclear aromatics (PNA) from distillate range species, it is broadly ineffective in deterring the combination of pre-existing PNA fragments in the oil feed. Quantification of the conversion to distillate liquids before the onset of coke formation helps arrive at a clearer conclusion on whether the use of SCW in the batch reactor leads to better product outcomes for different oil feeds and operating conditions.

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