https://dspace.kpfu.ru/xmlui/handle/net/6046 2026-11-11T03:49:22Z https://dspace.kpfu.ru/xmlui/handle/net/186208 Effect of Reaction Pathways on the Kinetic Modeling of Aquathermolysis of Heavy Oils Felix Lugo Jose Guillermo; Tirado Kota Aleksis; Varfolomeev Mikhail Alekseevich; Ancheyta Juarez Jorge The proposal of a reaction scheme during the kinetic modeling of heavy crude oil upgrading is an important step. Therefore, the study of the effect of using different reaction pathways on the kinetic modeling for the aquathermolysis of Ashalcha heavy crude oil was studied. A total of 10 and 13 pathways for the reactions of SARA (saturates, aromatics, resins, and asphaltenes) and gas fractions were considered in the kinetic modeling. The yield predictions using both schemes showed similar results for asphaltenes, saturates, and gas fractions. For resin and aromatic yields, the more complex network displayed a more accurate fit, reducing the average absolute error value from 4.83% to 3.59%. The different values obtained for the kinetic parameters suggest two different reaction mechanisms: for the 13 reaction pathways, the in-series reactions between asphaltenes, resins, and aromatics, including their corresponding condensation reactions, are promoted, while for the 10 pathways for SARA reactions, the parallel conversion of asphaltenes and resins to light fractions displayed higher rates. Resin molecules exhibited higher reactivity than asphaltenes. The more suitable reaction mechanism is that using 13 pathways in the network, based on the reactions of SARA fractions reported in the literature. Similar rates were noticed for the agglomeration and cracking reactions of aromatics, resins, and asphaltenes. 2024-01-01T00:00:00Z https://dspace.kpfu.ru/xmlui/handle/net/186207 A Commercial Reactor Simulation for the Slurry-Phase Hydrocracking of Heavy Oil with a Mineral Catalyst Using Distillation Lumps and SARA-Based Kinetic Models Calderón Cristian J.; Felix Lugo Jose Guillermo; Ancheyta Juarez Jorge Modeling and simulations of an industrial-scale slurry-phase reactor for heavy crude oil hydrocracking of SARA fractions and distillation lumps are presented. The catalyst under consideration is a mineral material, molybdenite (average particle size of 63.5 μm), which is dispersed in crude oil. The reactor model considers axial dispersion for composition and temperature while the kinetic model is based on lumps for vacuum residue, vacuum gasoil, middle distillates, and naphtha, as well as on SARA fractions, including two more lumps to take into account the coke and gas formation. The dynamic simulations were carried out at 360-400 ?C and 3.9 MPa of pressure and a catalyst concentration of 5000 ppm of active metal (Mo). The steady state of the distillation lumps and the SARA fractions, as well as gas and coke was analyzed and discussed for temperature variations between 360 and 400 ?C. The results showed that it is possible to model and adapt SARA fractions and boiling points-based intrinsic kinetic models to the reactor model so that further optimization studies can be carried out. 2024-01-01T00:00:00Z https://dspace.kpfu.ru/xmlui/handle/net/186204 Modeling the Kinetics of Hydrocracking of Heavy Oil with Mineral Catalyst. In: Mathematical Modeling of Complex Reaction Systems in the Oil and Gas Industry Felix Lugo Jose Guillermo; Trejo Fernando; Ancheyta Juarez Jorge Discrete and continuous lumping models have been largely used to represent the reaction kinetics. Recently, the use of more complex and fundamental microkinetic models to simulate hydrocracking has increased the interest of the research community. A significant number of researchers determine the reaction order from the experimental findings or adopt values documented in the literature. The most inferred reaction order in the kinetic model for the hydrocracking of heavy oil using dispersed catalyst is the first order. The kinetic model based on SARA fractions (6-lump) was employed as well as the regular solution model to calculate the molar volumes and solubility parameters of SARA fractions, and then estimate the content of sediments during the hydrocracking of heavy oil using molybdenite as catalyst. One advantage of utilizing this kind of catalysts is that the mineral catalysts are cheaper compared with commercial catalyst used in other technologies. 2024-01-01T00:00:00Z https://dspace.kpfu.ru/xmlui/handle/net/186203 Kinetic Insights into Heavy Crude Oil Upgrading in Supercritical Water Tirado Kota Aleksis; Felix Lugo Jose Guillermo; Al-Muntaser Ameen Ahmed; Varfolomeev Mikhail Alekseevich; Ancheyta Juarez Jorge Heavy crude oil upgrading in a supercritical water environment is a promising technology owing to diverse advantages such as heteroatom removal, high yields of low molecular weight fractions, and inhibition of coke production. In order to increase the performance of this process, some challenges need to be overcome by researching the reaction mechanisms and developing proper numerical models. Therefore, the kinetic studies reported in the literature for hydrothermal upgrading of heavy crude oil under supercritical water conditions and their results were systematically analyzed and discussed to achieve a better understanding of the diverse approaches considered to determine the distribution of reaction products and limitations. Additionally, fundamental aspects of the kinetic models, including experimental considerations and numerical methodologies applied for kinetic parameter estimation, are reviewed to obtain representative information about the reactant system that can be subsequently integrated into reactor design models or reservoir simulations. 2024-01-01T00:00:00Z