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Journal articles on the topic 'Diesel hydrotreating unit'

Author: Grafiati
Published: 6 September 2023

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1

Samoilov, N. A. "Mathematical Modeling of Diesel Fuel Hydrotreating." Oil and Gas Technologies 130, no. 5 (2020): 18–25. http://dx.doi.org/10.32935/1815-2600-2020-130-5-18-25.

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The principles of mathematical modeling of Hydrotreating diesel fuel in the representation of raw materials in the form of a set of narrow fractions in which the total content of various organosulphuric components is considered as a pseudocomponent are considered. As a result of the analysis of schemes of reactor blocks of Hydrotreating plants the most perspective two-reactor systems characterized by separate desulfurization of streams are revealed. It is shown that the preliminary fractionation of Hydrotreating raw materials into light and heavy fractions with the choice of the optimal boundary of fraction division can minimize the loading of the catalyst into the reactor unit. An algorithm for solving this problem, including experimental and computational fragments, is presented.
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2

Tian, Ruijie, Weibin Xu, Yongchao Li, Jun Tian, and Le Wu. "Energy Consumption Analysis of a Diesel Hydrotreating Unit Using an Aspen Simulation." Processes 10, no. 10 (October 11, 2022): 2055. http://dx.doi.org/10.3390/pr10102055.

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The petrochemical industry is traditionally a high energy consumption industry, thus energy saving in this industry is of great significance in terms of trying to achieve the national goal of “carbon-peak and carbon neutrality” in China. Diesel is one of the main products of petrochemical enterprises. The energy consumption of a diesel hydrotreating (HDT) unit is relatively high due to the high reaction temperature and pressure of HDT reactors. In order to further explore the energy consumption of diesel HDT units under different operating conditions, this paper establishes a full-process simulation based on the kinetics of hydrodesulfurization, hydrodenitrogenation, and aromatics saturation, in Aspen Plus to discuss the effect of different operating conditions on the electricity, steam, and fuel gas consumptions. The results show that with the increase of reaction temperature or reaction pressure, the sulfur content in diesel oil decreases, but the consumption of related utilities and comprehensive energy consumption increases. In addition, this paper also analyzes the energy consumption changes under the operating condition boundaries when the diesel quality is unchanged. When the reaction pressure is 8 MPa and the reaction temperature is 317.5 °C, the comprehensive energy consumption is 5% lower than the energy consumption with the reaction pressure of 6 MPa and the temperature of 320 °C. Therefore, on the premise of satisfying the diesel product quality, the comprehensive energy consumption of the diesel HDT unit can be reduced by increasing the reaction pressure and decreasing the reaction temperature.
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3

Korovnikova, Natalia, Volodymyr Oliinik, and Oleksandr Dubyna. "Research of Pyrophoric Compounds in Order to Reduce their Hazard." Materials Science Forum 1038 (July 13, 2021): 454–59. http://dx.doi.org/10.4028/www.scientific.net/msf.1038.454.

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The constantly growing content of sulfur compounds and the increased water content in the extracted oil enhances the aggressiveness of the environments in which the technological equipment of oil depots and pipelines operates, resulting in a higher number of emergencies in the equipment of oil refineries. Thus, one of the most urgent problems is the corrosion damage to oil storage equipment and the associated consequences of flammable pyrophoric compounds formation. Finely dispersed flammable sulfides with organic impurities are formed in the equipment of the diesel fuel distillate hydrotreating unit thus accumulating on the bottoms and walls of tanks and reservoirs. This negatively affects the material balance of the hydrotreating process and increases fire and explosion hazards of the whole hydrotreating process at the refinery. For the first time, the elemental composition of pyrophoric deposits formed while storing petroleum products in the LCh-24-2000 unit was experimentally investigated. These sulfides are a flammable component of the equipment in the hydrotreating process, where diesel fuel distillates rotate. The obtained results of the test study as for the prevention of pyrophores spontaneous combustion indicate that hydrogen peroxide solutions have the highest efficiency. The practical significance of the results is in the use of experimental studies on the spontaneous combustion of pyrophoric samples in the development of the equipment cleaning terms during the hydrotreating process from pyrophoric deposits at the refinery. The experimental results of testing the ability of chemicals to prevent pyrophores spontaneous combustion can be used to reduce the risk of spontaneous combustion of pyrophoric compounds.
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4

TUKTIN, B. T., A. S. TENIZBAEVA, G. T. SEIDILDA, and D. E. SHOGANBEK. "HYDROTREATMENT OF DIESEL FRACTIONS ON A MODIFIED ALUMINUM-NICKEL-MOLYBDENUM CATALYST KGO-12." Neft i gaz 1, no. 121 (April 15, 2020): 86–94. http://dx.doi.org/10.37878/2708-0080/2021-1.07.

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The paper presents the results of the study of hydrotreatment of hexane, decane and diesel oil fractions on a new aluminum oxide zeolite-containing catalyst KGO – 12, modified with metals with variable valence, phosphorus and lanthanum additives. The hydrotreatment process was studied in a high-pressure flow unit with a stationary catalyst bed at temperatures of 320 – 400° C, a pressure of 4.0 MPa, and a volumetric feed rate of 2 h-1. After hydrotreating the diesel fraction of oil on the KGO – 12 catalyst at 400° C, the sulfur content in the catalysate decreases from 0.141 to 0.0092%, and the solidification temperature decreases from minus 27 to minus 57° C. The study of the process of hydrotreatment of the n-alcanes diesel fraction on the KGO – 12 catalyst showed that hydrotreatment, hydroisomerization and hydrocracking reactions occur simultaneously. It is established that the developed KGO – 12 catalyst has a high activity in the process of hydrotreating the diesel fraction of oil and makes it possible to obtain low-setting low-sulfur diesel fuel.
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5

Samoilov, Naum. "The specifics of mathematical modeling complex multicomponent chemical processes." Industrial processes and technologies 1, no. 1 (2021): 37–52. http://dx.doi.org/10.37816/2713-0789-2021-1-1-37-52.

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A critical analysis of the problem of identifying raw materials for hydrotreating diesel fuel by organosulphuric components and quantifying the value of the rate constant of the hydrodesulphurization reaction is presented. It is proposed to describe the raw material as a set of narrow fractions, in each of which the content of various organosulphuric components is considered as a single pseudo-component. The prospects of separate hydrotreatment of diesel fuel pre - fractionated into wide easily and hardly hydrogenated fractions are confirmed, which allows reducing the loading of the catalyst into the reaction unit of the plant by 1.4-1.7 times compared to the traditional process scheme.. It is proposed to use the concept of kinetic coefficient for mathematical modeling of the hydrotreating process instead of the incorrect reaction rate constant in this case. The dependence of the gross conversion rate constant of the raw material on the time of fixing the depth of its hydrodesulfurization is proved by the example of modeling the hydrotreatment of diesel fuel for a number of raw material variants.
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6

Serdyukova, E. Yu, Yu V. Kozhevnikova, D. A. Nikolaeva, and A. A. Perminova. "Exploring the Possibility of Engagement in the Raw Materials of Hydrotreating the Diesel Fraction of Biocomponents." Chemistry and Technology of Fuels and Oils 637, no. 3 (2023): 3–7. http://dx.doi.org/10.32935/0023-1169-2023-637-3-3-7.

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The article presents the results of calculating the optimal ratio of the diesel fraction and the 180-240 °C fraction of the biocomponent obtained during slow pyrolysis of plant waste. Comparative tables are given on the technological mode of operationof the hydrotreating reactor unit and on the quality of the products obtained with and without the involvement of the biocomponent.
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7

Tarusov, D. V., V. K. Slakaev, G. S. Mutovkin, V. E. Znaemov, A. N. Karpov, N. Y. Bashkirtseva, A. V. Tarasov, and D. V. Borisanov. "Changing the properties of narrow fractions in the process of hydrotreating light coking gas oil." World of petroleum products 04 (2022): 36–41. http://dx.doi.org/10.32758/2782-3040-2022-0-4-36-41.

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Currently, the main products of the delayed coking plant in the Russian Federation (after hydrotreating) are gasoline and diesel fuel summer. The paper presents the results of a study of the properties of narrow fractions of coking gas oil and hydrotreated coking gas oil, which showed the prospect of organizing production based on the coking process of more marginal aviation kerosene and winter diesel fuel. The separation of products into narrow 20 degree fractions was carried out on an automatic distillation unit AUTOMAXX 9100. The dependences of nitrogen, sulfur, aromatics, density, and low-temperature properties on the boiling temperatures of narrow fractions of the composition of light coking gas oil and hydrotreated light coking gas oil have been studied. Analysis of the properties of narrow fractions of hydrotreated light coking gas oil has shown the theoretical possibility of obtaining fractions of jet fuel and winter diesel fuel on its basis, instead of summer diesel fuel.
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8

Bandyopadhyay, Rajarshi, Ole Frej Alkilde, and Sreedevi Upadhyayula. "Applying pinch and exergy analysis for energy efficient design of diesel hydrotreating unit." Journal of Cleaner Production 232 (September 2019): 337–49. http://dx.doi.org/10.1016/j.jclepro.2019.05.277.

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9

Murali, C., R. K. Voolapalli, N. Ravichander, D. T. Gokak, and N. V. Choudary. "Trickle bed reactor model to simulate the performance of commercial diesel hydrotreating unit." Fuel 86, no. 7-8 (May 2007): 1176–84. http://dx.doi.org/10.1016/j.fuel.2006.09.019.

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10

Demin, A. M., A. P. Naumenko, O. A. Reutova, and A. I. Odinets. "Economic evaluation of use of heat exchange equipment diagnostic software at diesel hydrotreating unit." Journal of Physics: Conference Series 1260 (August 2019): 032009. http://dx.doi.org/10.1088/1742-6596/1260/3/032009.

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11

Bandyopadhyay, Rajarshi, Ole Frej Alkilde, Ian Menjon, Lene Have Meyland, and Iggy Vincent Sahlertz. "Statistical analysis of variation of economic parameters affecting different configurations of diesel hydrotreating unit." Energy 183 (September 2019): 702–15. http://dx.doi.org/10.1016/j.energy.2019.06.156.

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12

Demin, A. М., and A. P. Naumenko. "Diagnostics of heat exchange equipment on basis of operating parameters of diesel fuel hydrotreating unit." Omsk Scientific Bulletin, no. 166 (2019): 84–88. http://dx.doi.org/10.25206/1813-8225-2019-166-84-88.

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13

Yakupov, I. R., V. V. Yurchenko, A. V. Akhmetov, M. U. Imasheva, and A. F. Akhmetov. "Qualification of light cycle gas oil fractions as raw material of diesel oil cut hydrotreating unit." "Proceedings" of "OilGasScientificResearchProjects" Institute, SOCAR, no. 2 (June 30, 2015): 68–72. http://dx.doi.org/10.5510/ogp20150200244.

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14

Zhang, Jianwen, Fan Zhang, Yan Li, Yahui Zhao, and Gang Sheng. "Crystallization Behavior of Ammonium Chloride in High-Pressure Heat Exchanger of Hydrotreating Unit." Mathematical Problems in Engineering 2021 (December 28, 2021): 1–15. http://dx.doi.org/10.1155/2021/5056631.

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In view of the corrosion failure of a high-pressure heat exchanger in a diesel hydrogenation unit, the formation mechanism of ammonium chloride in a multiphase flow system is investigated in this article. Numerical simulation is carried out by user defined function (UDF) on the process of adding source of mass transfer in computational fluid dynamics (CFD) solvers. The distribution characteristics of ammonium chloride are illustrated by the parameters including crystallization temperature of ammonium chloride, volume fraction of ammonium chloride, and mass transfer rates of NH3 and HCl, and the causes of corrosion cracking in the U-shaped bend of the heat exchanger are discussed. The results show that there is a great risk of ammonium chloride deposition in the heat exchanger from 4.5 m away from the outlet of the second pass. The crystallization area in the tube gradually expands from the wall to the center along the flow direction, and the crystallization rate is higher near the tube wall. The field sampling test results show that the corrosion cracking is hydrogen-induced cracking, which is due to the existence of large amount of hydrogen, high impacting force, excessive flow rate, and the risk of ammonium chloride particle erosion at the U-bend. In order to alleviate the corrosion of ammonium chloride deposition, some improvement measures are put forward, such as raising the inlet temperature of the tube side to 215 °C and increasing the water injection by 30%, which play an important role in decreasing the formation of ammonium chloride in the heat exchange system.
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15

Mikhaylova, K. A., V. D. Cherepanov, A. Yu Volegova, and I. E. Kuzora. "Determination of the total content of aromatic hydrocarbons by Fourier-transform IR spectroscopy in the products of diesel hydrofining." Industrial laboratory. Diagnostics of materials 86, no. 7 (July 18, 2020): 20–26. http://dx.doi.org/10.26896/1028-6861-2020-86-7-20-26.

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A comparative analysis of current methods for determination of aromatic hydrocarbons in the components of diesel fuel revealed that IR spectrometry appeared to be the most optimal method for operational control of the content of aromatic hydrocarbons in medium distillate products of the hydrogenation process. We developed a procedure for quantitative determination of aromatic hydrocarbons in the components of diesel fuel using IR Fourier spectroscopy. The analysis of absorption spectra of the components of diesel fuel revealed that the optical density of the stretching vibration band of the aromatic ring is proportional to the quantitative content of aromatic hydrocarbons (AHC) in the components of diesel fuel. One of the components for compounding diesel fuels obtained at JSC «ANKhK» during hydrotreating of raw materials under severe conditions (30 MPa, 380 – 400°C) was selected as an object of the study. Conditions of IR spectrometric analysis (wave number — 1606.5 cm–1, cell material — NaCl, absorbing layer thickness — 0.1 cm) were specified after recording of the absorption spectrum of the purified component. To construct a calibration dependence the total AHC content and corresponding optical density of the sample were determined by the methods of HPLC and IR spectrometry, respectively. The samples of hydrogenate under study (taken at different timepoints) contained 1 – 8% AHC on average depending on the parameters of a continuously operating unit. The characteristics of the proposed procedure were evaluated in accordance with the requirements of RMG 76–2014. The correctness of the obtained results of AHC determination was confirmed in comparison with the data of independent (tetrimetric) analysis. The use of the developed method in analysis of other components of diesel fuel, requires additional studies to determine the interfering substances and assess their impact on the accuracy of AHC determination.
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16

Dolinskii, S. E., T. A. Chizhevskaya, and D. A. Nikiforov. "Combined modular unit for hydrotreating diesel fuelwith output of 50 to 500,000 tons/year with a hydrogen production block." Chemistry and Technology of Fuels and Oils 46, no. 1 (April 23, 2010): 22–24. http://dx.doi.org/10.1007/s10553-010-0178-7.

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17

"Production of low aromatics and low sulfur diesel in a hydrodesulfurization (HDS) pilot plant unit." Issue 1 1, no. 1 (April 28, 2013): 15–22. http://dx.doi.org/10.30955/gnj.000121.

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The present work investigates the hydrotreating process of a diesel in order to achieve lower sulphur and aromatics content. The entire work was performed in a Hydrodesulphurization (HDS) pilot plant unit located in Chemical Process Engineering Research Institute (CPERI). For the tests, a commercial HDS catalyst (CoMo) was used while the feed was provided by the deep desulphurization unit of a Greek refinery (Motor-Oil refinery). For the determination of diesel aromatics, a method based on the ASTM D- 2549-85 was applied. The objective of the work was to investigate the ability of a typical HDS catalyst for aromatics saturation. The effect of the main hydrotreating operating parameters (T, P, WHSV, H2/Oil ratio) on sulphur and aromatics removal was also investigated. In general, the data showed that the product density and the aromatic and sulphur content of diesel decreased as the temperature or pressure increased or space velocity decreased. It was concluded that with the present catalyst an aromatics saturation degree of up to 40% could be achieved, giving a diesel product with aromatics content of about 20-25% wt. However, high temperatures (>370°C) were required in order to achieve 500 ppmw sulphur in this feedstock.
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18

Aguiar, Anna Paula V. de A., Lúis Gustavo S. Longhi, George Acioli Júnior, Antonio Zani, and Péricles R. Barros. "Inverted Decoupling PID Control Applied to the Reactors of a Diesel Hydrotreating Unit." Journal of Control, Automation and Electrical Systems, December 15, 2022. http://dx.doi.org/10.1007/s40313-022-00977-0.

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19

Chinmay Walinjkar, Pushkar Sutar, B.G Avhad, and P.B Walinjkar. "Development of Data Analysis Software to Identify Leakage from Radiotracer Data." International Journal of Advanced Research in Science, Communication and Technology, May 30, 2022, 40–45. http://dx.doi.org/10.48175/ijarsct-4462.

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The radiotracer method is used to identify the leakage in the heat exchanger from a bank of heat exchangers of the Diesel Hydrotreating (DHDT) unit in the refinery. The data of the radiotracer study is analyzed using peak detection techniques to identify the leakage. This paper introduces a software solution to analyze the radiotracer data. The paper also discusses various data smoothing and peak detection techniques used in the software. This software tool was tested successfully using simulated data and verified using actual data from previous studies. The software tool correctly differentiated false peaks and leakage peaks. This result was helpful for correctly identifying the leaking heat exchanger.
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