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Effect of Hydrothermal Treatment and Prolonged Extraction on the Generation of Hydrocarbons from High-Carbon Low-Permeability Rocks from Domanik Deposits 热液处理和长期萃取对多马尼克矿床高碳低渗透岩石生成碳氢化合物的影响
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-25 DOI: 10.1134/s0965544124030149
A. N. Mikhailova, G. P. Kayukova
{"title":"Effect of Hydrothermal Treatment and Prolonged Extraction on the Generation of Hydrocarbons from High-Carbon Low-Permeability Rocks from Domanik Deposits","authors":"A. N. Mikhailova, G. P. Kayukova","doi":"10.1134/s0965544124030149","DOIUrl":"https://doi.org/10.1134/s0965544124030149","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of hydrothermal treatment of high-carbon low-permeability Domanik rock on the efficiency of recovering hydrocarbons from this rock by prolonged four-step extraction for 20, 68, 116, and 220 h with a mixture of organic solvents (chloroform, toluene, and isopropyl alcohol) was studied. As compared to the extraction from the untreated rock, the hydrothermal treatment at 300°С in a СО<sub>2</sub> medium allows recovery of a 6 times larger amount of the extract in the first step (in 20 h). In the second extraction step (68 h), the extract yield decreases by a factor of 8, but the relative content of saturated hydrocarbons in the extract increases by a factor of more than 3 compared to the first step, whereas the relative content of asphaltenes, resins, and aromatic compounds decreases. In the third extraction step (116 h), the extract yield is as low as 0.16%, the content of resins in it drastically decreases, whereas the content of asphaltenes increases to 52%. The extract of the fourth step (220 h) consists to 80.77% of asphaltenes. From the initial rock, the maximal yield of the extract enriched in saturated hydrocarbons with the minimal content of asphaltenes was observed after the second extraction step. In the course of prolonged extraction, the yield of petroleum fractions from the initial rock increases by a factor of almost 4, and in combination with the preliminary hydrothermal treatment, by a factor of 7. This fact demonstrates the possibility of generating an additional amount of hydrocarbons. Changes were revealed in the structural-group, hydrocarbon, elemental, and microelemental composition of petroleum fractions recovered from the low-permeability Domanik rock, depending on the extraction time and transformations of the organic matter of this rock in the course of hydrothermal treatment.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Composite Mesoporous Nano-Catalysts for Clean Fuel Produced by the Oxidative Desulfurization Process 用于氧化脱硫工艺生产清洁燃料的新型复合介孔纳米催化剂
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-25 DOI: 10.1134/s0965544124030150
Aysar T. Jarullah, Ban A. Al-Tabbakh, Helal A.A Saleem, Shymaa A. Hameed, Jasim I. Humadi, Iqbal M. Mujtaba
{"title":"New Composite Mesoporous Nano-Catalysts for Clean Fuel Produced by the Oxidative Desulfurization Process","authors":"Aysar T. Jarullah, Ban A. Al-Tabbakh, Helal A.A Saleem, Shymaa A. Hameed, Jasim I. Humadi, Iqbal M. Mujtaba","doi":"10.1134/s0965544124030150","DOIUrl":"https://doi.org/10.1134/s0965544124030150","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Clean fuel production with strict limit on toxic contaminants is one of the most important aims for petroleum refinery industry regarding the improvement of environmental conditions. In this study, oxidative desulfurization (ODS) process has been used to achieve such goal. For this purpose, a new and efficient synthetic composite mesoporous nano-catalyst has been designed by enhancing morphological and mechanical properties of gamma alumina (γ-Al<sub>2</sub>O<sub>3</sub>) on a carbon nano fiber (CNF) as multiple supports. Four different catalysts based on different amount of CNF have been designed. X-Ray diffraction (XRD), X-Ray fluorescence (XRF), crash strength test, thermal gravimetric examination (TGA), and surface area (BET) have been used to characterize the catalysts. The catalyst with 10% loading of CNF (CAT-3) has been found to increase the tensile strength by more than 200% compared to the CNF-free sample (CAT-4). Then, a series of experiments has been conducted in a batch ODS reactor with air as an oxidant and light gas oil (LGO) as a real feedstock to evaluate the effectiveness of the designed catalysts and the performance of the reactor. The new catalyst has been clearly shown to be a significant factor in sulfur removal resulting in a clean fuel.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oil Deposits in Highly Paraffinic Crude Oils and in Model System 高石蜡原油和模型系统中的石油沉积物
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-19 DOI: 10.1134/s0965544124030137
N. V. Yudina, Yu. V. Loskutova
{"title":"Oil Deposits in Highly Paraffinic Crude Oils and in Model System","authors":"N. V. Yudina, Yu. V. Loskutova","doi":"10.1134/s0965544124030137","DOIUrl":"https://doi.org/10.1134/s0965544124030137","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effects of temperature gradient on the formation, composition, and strength of oil deposits were investigated. As the crude oil temperature and the wall surface temperature were lowered, the concentrations of the oil fraction and low-molecular-weight paraffins in the deposits increased; simultaneously, the amounts of resins and asphaltenes declined. In the asphalt–resin–paraffin deposits formed in an asphaltene-free oil sample, cooling led to a rise in the content of resins and a decline in the content of the oil fraction. Model experiments demonstrated that the highest inhibitory capacity with respect to paraffin wax deposition was achieved in the case of 0.5–1.0 wt % asphaltenes being added. This can be attributed to the steric effect of aromatic rings manifested in their ability to disrupt the nucleation of paraffin networks. Therefore, the model wax deposits formed after adding asphaltenes exhibited a lower strength than the samples obtained with the addition of benzene resins and alcohol–benzene resins.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Ultrasonic Treatment on the Properties and Composition of High-Wax Crude Oil and Its Precipitates 超声波处理对高蜡原油及其沉淀物的性质和成分的影响
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-19 DOI: 10.1134/s0965544124020026
G. I. Volkova, D. A. Zubarev, P. B. Kadychagov
{"title":"Effect of Ultrasonic Treatment on the Properties and Composition of High-Wax Crude Oil and Its Precipitates","authors":"G. I. Volkova, D. A. Zubarev, P. B. Kadychagov","doi":"10.1134/s0965544124020026","DOIUrl":"https://doi.org/10.1134/s0965544124020026","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>High-wax crude oil was treated with ultrasound (sample weight 50 g, frequency 22 kHz, field intensity 8 W/cm<sup>2</sup>) for 10 min. The ultrasonic treatment led to an increase in the crude oil viscosity, viscous flow activation energy, specific energy of the break of the disperse system, congealing point, pour point, and precipitate amount and to changes in the precipitate structure. The oil fraction of the crude oil, precipitates, and raffinates was analyzed by IR spectroscopy and chromatography–mass spectrometry. The content of high-molecular-mass <i>n</i>-alkanes in oils from the precipitate of the ultrasonically treated crude oil considerably decreases.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular Basis of Asphaltene Stability 沥青烯稳定性的分子基础
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-08 DOI: 10.1134/s0965544124030010
E. S. Okhotnikova, Yu. M. Ganeeva, E. E. Barskaya, G. R. Fazylzyanova, T. N. Yusupova, V. I. Morozov, D. S. Ivanov
{"title":"Molecular Basis of Asphaltene Stability","authors":"E. S. Okhotnikova, Yu. M. Ganeeva, E. E. Barskaya, G. R. Fazylzyanova, T. N. Yusupova, V. I. Morozov, D. S. Ivanov","doi":"10.1134/s0965544124030010","DOIUrl":"https://doi.org/10.1134/s0965544124030010","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The instability of asphaltenes in crude oils, manifested in their precipitation, is a major production issue that may arise both during the recovery and processing of petroleum feedstocks. The purpose of this study was to investigate the molecular structure of asphaltenes in order to shed light on the causes of their precipitation. To this end, the molecular structures of stable (remaining in the solution) and unstable (precipitated) asphaltenes were characterized by EPR, NMR, and IR spectroscopy. Using crude oil asphaltenes and air-blown asphalt as objects for the study, only weak increasing and decreasing trends were observed in the content of aromatics and oxygenates, respectively, in the unstable asphaltene fraction. The stable and unstable asphaltenes were found to differ in adsorption capacity. It was shown that the species adsorbed on asphaltenes are rich in moieties of aromatic acid esters, and that removing these species further eliminates the structural-group composition differences between stable and unstable asphaltenes. The study findings suggest that the stability of asphaltenes in crude oils can be controlled by introducing synthetic aromatic acid esters structurally similar to natural surfactants.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CoMo Sulfide Catalysts Supported on Natural Halloysite Nanotubes: Dealumination as an Effective Approach to Improve Catalytic Performance 以天然霍洛石纳米管为载体的硫化钴催化剂:脱铝是提高催化性能的有效方法
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-08 DOI: 10.1134/s0965544124030071
N. A. Vinogradov, V. I. Elizarova, A. V. Vutolkina, A. A. Pimerzin, A. P. Glotov
{"title":"CoMo Sulfide Catalysts Supported on Natural Halloysite Nanotubes: Dealumination as an Effective Approach to Improve Catalytic Performance","authors":"N. A. Vinogradov, V. I. Elizarova, A. V. Vutolkina, A. A. Pimerzin, A. P. Glotov","doi":"10.1134/s0965544124030071","DOIUrl":"https://doi.org/10.1134/s0965544124030071","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>–CoMo sulfide catalysts supported on aluminosilicate halloysite nanotubes (CoMoS/HNT) and on dealuminated halloysite nanotubes (CoMoS/HNT(deAl)) were synthesized by incipient wetness impregnation using pseudoboehmite as a binder. Both the supports and related catalysts were characterized by low-temperature nitrogen adsorption, energy dispersive X-ray fluorescence analysis, temperature-programmed reduction by hydrogen, FTIR spectroscopy of adsorbed pyridine, transmission electron microscopy, and X-ray photoelectron spectroscopy. The catalyst samples were further tested in hydrotreating of diesel feedstocks. Dealumination of halloysite was found to increase the area of Si-enriched surface segments, thus weakening interaction between the sulfide phase and the support and, hence, increasing the content of highly active sulfide particles. In the case of a mixed feedstock, CoMoS/HNT(deAl) + Al<sub>2</sub>O<sub>3</sub> achieved a reaction rate constant of 0.605 ppm S<sup>–0.4</sup>/g(L<sup>–0.4</sup> h) compared to 0.429 ppm S<sup>–0.4</sup>/g(L<sup>–0.4</sup> h) for an alumina-supported sample.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Specific Features of Realizing the Generation Potential of Carbonate and Carbonate–Siliceous Domanik Rocks by Treatment with Sub- and Supercritical Water 通过亚临界和超临界水处理实现碳酸盐岩和碳酸盐硅质多马尼克岩发电潜力的具体特点
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-08 DOI: 10.1134/s0965544124030095
Z. R. Nasyrova, G. P. Kayukova, E. I. Shmeleva, G. G. Islamova, A. N. Mikhailova, A. V. Vakhin
{"title":"Specific Features of Realizing the Generation Potential of Carbonate and Carbonate–Siliceous Domanik Rocks by Treatment with Sub- and Supercritical Water","authors":"Z. R. Nasyrova, G. P. Kayukova, E. I. Shmeleva, G. G. Islamova, A. N. Mikhailova, A. V. Vakhin","doi":"10.1134/s0965544124030095","DOIUrl":"https://doi.org/10.1134/s0965544124030095","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Comparative studies on transformation of the organic matter (OM) of high-carbon carbonate–siliceous–clay rock with С<sub>оrg</sub> 7.07% and low-carbon carbonate rock with С<sub>оrg</sub> 0.33% from Domanik deposits in Tatarstan in sub- (SBW) and supercritical (SCW) water were performed. The potential of the carbonate rock is utilized virtually completely in SBW at 320°С. From the high-carbon Domanik rock, SBW allows only more complete extraction of free hydrocarbons, asphaltene compounds, and solid <i>n</i>-alkanes without significantly altering the kerogen structures. The kerogen degradation occurs most intensely in SCW and is accompanied by a decrease in the generation potential and by an increase productive capacity of the rock. In the oil extracted from the high-carbon rock with SCW at 374°С, the content of saturated and aromatic fractions increases by a factor of more than 2, the content of asphaltenes and resins decreases, and carbenes/carboids are formed. At 420°С, the oil yield and the content of carbenes/carboids decrease. In the extraction from the carbonate rock, on the contrary, at 374°С the content of light oil fractions decreases, and the fraction of resins increases by a factor of more than 1.5; at 420°С, the content of asphaltenes increases by a factor of more than 2. Irrespective of the lithological composition of the rocks, with an increase in the SCW temperature, the yield of the gas phase and the content of alkanes, phenanthrenes, and dibenzothiophenes in the oil fractions increase, whereas the content of alkyltrimethylbenzenes, naphthalenes, and dibenzothiophenes decreases. The extent of utilizing the generation potential of OM of Domanik rocks depends on the content and composition of kerogen and high-molecular mass components and on their thermal stability in sub- and supercritical water.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Behavior of Nanocatalysts in Fischer–Tropsch Synthesis in Various Types of Three-Phase Slurry Reactors 纳米催化剂在不同类型三相淤浆反应器中进行费托合成的行为
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-07-08 DOI: 10.1134/s096554412403006x
A. E. Kuz’min, O. S. Dementeva, M. V. Kulikova, Ya. V. Morozova, S. A. Svidersky, A. L. Maximov
{"title":"Behavior of Nanocatalysts in Fischer–Tropsch Synthesis in Various Types of Three-Phase Slurry Reactors","authors":"A. E. Kuz’min, O. S. Dementeva, M. V. Kulikova, Ya. V. Morozova, S. A. Svidersky, A. L. Maximov","doi":"10.1134/s096554412403006x","DOIUrl":"https://doi.org/10.1134/s096554412403006x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The catalytic performance of iron-based nanodispersions in Fischer–Tropsch synthesis in two different slurry reactor types, specifically a continuous stirred-tank reactor (CSTR) and a slurry bubble column reactor (SBCR), was comparatively investigated. It was found that, at equal process temperatures, the CO conversion in the SBCR using a gas disperser with four equally spaced 1-mm holes was lower than that in the CSTR. However, this observation is inconsistent with other reports in the literature. Replacing this disperser with a plate with a single centered 2-mm hole enhanced the CO conversion up to values close to those obtained in the CSTR. The reaction rate constants were calculated for the different reactor types.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141577416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation of the Au/TiO2 Catalyst for the Oxidation of 2-Phenylethyl Alcohol using a Cacumen Platycladi Extract as a Reducing Agent 使用 Cacumen Platycladi 提取物作为还原剂制备氧化 2-苯基乙醇的 Au/TiO2 催化剂
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-06-27 DOI: 10.1134/s0965544124030125
Jiali Xiao, Longsheng Zhou, Dangqin Jin, Hui Zhou, Dongfan Liu, Bingyun Zheng
{"title":"Preparation of the Au/TiO2 Catalyst for the Oxidation of 2-Phenylethyl Alcohol using a Cacumen Platycladi Extract as a Reducing Agent","authors":"Jiali Xiao, Longsheng Zhou, Dangqin Jin, Hui Zhou, Dongfan Liu, Bingyun Zheng","doi":"10.1134/s0965544124030125","DOIUrl":"https://doi.org/10.1134/s0965544124030125","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A Supported gold catalyst was prepared by reduction of HAuCl<sub>4</sub> with the Cacumen Platycladi extract. This catalyst was then used for oxidation of 2-phenylethyl alcohol in a model reaction. Our study evaluated the effect of various preparation conditions, including the Au loading ratio and calcination temperature. Additionally, we explored the influence of the reaction temperature and reaction time on the catalytic performance of a Au/TiO<sub>2</sub> catalyst. Our experimental findings revealed notable results for the Au/TiO<sub>2</sub> catalyst characterized by the Au loading of 1.3 wt % and calcinated at 400°C. Under specific reaction conditions (0.3 g catalyst, 220°C, 3.0 MPa, 2.5 h), the conversion of 2-phenylethyl alcohol reached 45.3 and a 59.6% selectivity and a 27.0% yield of the target product (phenylacetaldehyde). In addition, catalytic performance remained stable after 8 repeated uses.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Complex-Oxide Catalysts in Cracking of Propane 复合氧化物催化剂在丙烷裂解中的应用
IF 1.4 4区 工程技术
Petroleum Chemistry Pub Date : 2024-06-21 DOI: 10.1134/s0965544124030083
A. V. Kurochkin, K. A. Seromlyanova, M. M. Selivanova, D. N. Malyshev, A. D. Tereshkina, N. N. Lobanov, E. B. Markova, A. G. Cherednichenko
{"title":"Complex-Oxide Catalysts in Cracking of Propane","authors":"A. V. Kurochkin, K. A. Seromlyanova, M. M. Selivanova, D. N. Malyshev, A. D. Tereshkina, N. N. Lobanov, E. B. Markova, A. G. Cherednichenko","doi":"10.1134/s0965544124030083","DOIUrl":"https://doi.org/10.1134/s0965544124030083","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The study investigates propane conversion in the presence of rare-earth metal zirconates Ln<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> (Ln = La, Gd, and Lu) prepared by high-temperature solid-phase synthesis at 500, 1000, and 1500°C. In the La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> → Gd<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> → Lu<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> series, the phase transitions were found to follow the pyrochlore → defective fluorite → δ-phase route. This changed the parameters of the crystalline and local structures and, in particular, led to the appearance of oxygen vacancies in pyrochlore-based compounds. As a result of the structural changes, propane dehydrogenation prevailed over propane degradation. Therefore, the Lu<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> catalyst exhibited a higher propylene selectivity (up to 65%) than La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>, with 100% propane conversion being achieved.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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