Petroleum Chemistry最新文献

{"title":"Amorphous Titanosilicate Catalysts for Homolytic Oxidation of Cyclohexene under Mild Conditions","authors":"V. R. Bikbaeva,&nbsp;S. V. Bubennov,&nbsp;T. R. Prosochkina,&nbsp;N. A. Filippova,&nbsp;N. G. Grigor’eva,&nbsp;B. I. Kutepov","doi":"10.1134/S0965544125600559","DOIUrl":"10.1134/S0965544125600559","url":null,"abstract":"<p>Catalytic properties that mesoporous amorphous titanosilicate catalysts differing in physicochemical characteristics exhibit in cyclohexene oxidation with hydrogen peroxide to a mixture consisting mainly of alcohol and ketone were studied. The cyclohexene conversion and selectivity of formation of oxidation products depend both on the physicochemical properties of the titanosilicates studied (nature of active sites, porosity, etc.) and on the reaction conditions. The total selectivity with respect to the enol + enone fraction of 94% at the maximal cyclohexene conversion of 55% was reached in the presence of TSMa titanosilicate (Si/Ti = 40).</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 4","pages":"433 - 439"},"PeriodicalIF":1.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171650","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}

{"title":"Synthesis of RHO Zeolites by Steam-Assisted Dry Gel Conversion","authors":"E. Yu. Brazovskaya,&nbsp;Yu. A. Alikina,&nbsp;K. A. Belyaeva,&nbsp;O. Yu. Golubeva","doi":"10.1134/S0965544125600870","DOIUrl":"10.1134/S0965544125600870","url":null,"abstract":"<p>A series of RHO zeolites were synthesized by steam-assisted dry gel conversion (SAC). The effects of autoclave water volume, crystallization time, crystallization temperature, and ultrasonic treatment on the phase composition and particle size of RHO zeolites were investigated for the first time. Using X-ray diffraction analysis, scanning electron microscopy, and energy dispersive spectroscopy, the SAC method was found to synthesize high-purity and high-crystallinity RHO zeolites. The optimum synthesis conditions include a temperature of 140°C, a reaction time of 48 h, and 0.5 mL of water per 1 g of dry gel.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 4","pages":"323 - 330"},"PeriodicalIF":1.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171590","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}

{"title":"Effects of MFI Zeolite Acidity on Protein Adsorption","authors":"L. F. Atyaksheva,&nbsp;E. P. Andriako,&nbsp;D. O. Bachurina,&nbsp;V. A. Vorobkalo,&nbsp;A. V. Efimov,&nbsp;A. V. Smirnov,&nbsp;B. N. Tarasevich","doi":"10.1134/S0965544125600845","DOIUrl":"10.1134/S0965544125600845","url":null,"abstract":"<p>Isotherms were recorded for the adsorption of chicken egg lysozyme and bovine serum albumin (BSA) on MFI zeolites with different concentrations of acid sites (from 15 to 1000 μmol/g). The maximum adsorption capacities were evaluated, and the correlation between acid site concentration and protein adsorption capacity was identified. The sample with the highest acidity exhibited the highest adsorption capacity. The protein adsorption reduced the total acid site concentration by 20–30% and simultaneously increased the relative content of weak sites. Furthermore, the adsorption affected the IR spectra of the proteins.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 4","pages":"487 - 495"},"PeriodicalIF":1.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171649","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}

{"title":"One-Step Tandem Synthesis of Higher Amines from CO2 in the Modified Fischer–Tropsch Synthesis","authors":"O. S. Dement’eva,&nbsp;A. V. Borisov,&nbsp;M. E. Zimens,&nbsp;K. I. Dement’ev,&nbsp;S. D. Bazhenov,&nbsp;A. L. Maximov","doi":"10.1134/S0965544125600997","DOIUrl":"10.1134/S0965544125600997","url":null,"abstract":"<p>The possibility of amines synthesis from a mixture of carbon dioxide, hydrogen, and ammonia in a slurry reactor in the presence of bifunctional catalytic suspensions 1% Fe–1% Co–0.5% Al₂O₃–0.02% BaO was studied. In the presence of the suggested catalysts, primary amines with up to 16 carbon atoms in the chain are formed with 52–60% feed conversion in the yield reaching 2.4 g per 1 m³ of the initial syngas. The effect of the catalyst activation conditions on its activity in the tandem synthesis of higher amines and on the chain length in the aliphatic amines formed was determined: the increasing of pretreatment time with hydrogen from 2 to 4 h, the maximum feed conversion shifts toward lower temperatures by 40°C with a simultaneous significant increase of С₁₃–С₁₆ monoalkylamines content in the reaction products.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 3","pages":"248 - 258"},"PeriodicalIF":1.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145657","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}

{"title":"Ultrasonic Bubble Treatment of Heavy Oil as a Green Technology","authors":"Dina Harith Shaker,&nbsp;Raheek Ismael Ibrahim,&nbsp;Manal Kadhim Oudah,&nbsp;Hussain H. Al-Kayiem","doi":"10.1134/S0965544125040036","DOIUrl":"10.1134/S0965544125040036","url":null,"abstract":"<p>The depletion of low-viscosity crude oil reserves necessitates the production of heavy, high-viscosity crude oil. However, transportation of heavy oils is challenging due to their high viscosity. This study aims to develop a sustainable solution to reduce the viscosity of heavy oil by exploiting oscillating bubbles within the fluid. This is because traditional methods by drag reduction additives cause environmental pollution and dangerous emissions, in addition to their high economic cost. An ultrasonic device with a constant power of 150 W and a frequency of 40 kHz was used at different temperatures, while the ultrasonic irradiation time was 10 and 15 min. A viscosity reduction rates (VRR) factor was used to determine changes in viscosity. The viscosity reduction rate (VRR) was at its best at an irradiation time of 10 min under the present experimental conditions and at different temperatures, where it reached more than 36%. At 70°C, when the irradiation time reached 15 min, the viscosity of the oil samples increased. The results indicate that the cavitation, thermal, and mechanical effects of ultrasound can break the long carbon chains of crude oil and form short chains, thus reducing the viscosity. The increase in viscosity after increasing the irradiation time can be attributed to the re-association between molecules. The technique is promising as an eco-friendly and efficient method for heavy oil viscosity reducing alternative that reduces chemical usage and preventing carbon emissions.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 5","pages":"530 - 536"},"PeriodicalIF":1.1,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122408","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}

{"title":"Demulsification of Basra Crude Oil using Chemical Demulsifier and Ultrasonic","authors":"Luma H. Mahmoud,&nbsp;Rabab Raheem,&nbsp;Husham Mohammed Al-Tameemi,&nbsp;Adnan A. AbdulRazak","doi":"10.1134/S0965544125040048","DOIUrl":"10.1134/S0965544125040048","url":null,"abstract":"&lt;p&gt;Petroleum emulsions are considered one of the difficult problems in the oil industries because of the presence of high-salinity reservoir water with crude oil causes corrosion of pipes, insulators, tanks, and any vessel or tube through which the crude oil passes and salt is deposited on the surface of pipes from the inside, especially heater tubes, heat exchanger tubes, or others, causing many operational problems, such as the formation of coal inside heater tubes and the occurrence of cracks in them. From an economic standpoint, the water present with oil adds an operational burden to the installations, pipes, pumps, and tanks as a result of transporting and storing useless water. The aim of this study is to evaluate the effectiveness of chemical demulsifiers and ultrasonic techniques in demulsifying crude oil emulsions in Basra, where a simulated emulsion was prepared. Basra crude oil sample (29.6 API) was mixed with different percentages of distilled water (15, 30, and 50%) and 3% calcium, sodium and magnesium salts. The preparation process was carried out using a homogenizer with a mixing speed of 7000 rpm and a duration for 15 min. The effect of mixing speed on the stability of the emulsion was studied and then the emulsion was tested with several speeds (3000, 5000, and 7000 rpm) and its effect on the size of the water droplet dispersed in the emulsion. An advanced optical microscope was used to measure the volume of a water drop. Indirect ultrasound bath was used as a demulsification technique. The utilize of ultrasonic technology as a method for treating emulsions in crude oil is a new method and has not been applied so far in the oil industries, although it has not proven its efficiency in oil treatment processes, but it is considered a support method that has proven its worth as an aid to chemical treatment technology. In this study, the application of ultrasound waves (45kHz and 120Watt) and a study of their effect on the petroleum emulsion and then it was applied using it with a emulsifier EMBREAK* 2W157 and studying its effect with other factors such as temperature, acidity function, water percentage in emulsion, quantity of emulsifier, salt quantity. Then the separation efficiency reaching 96% for emulsion with water component 50 and 93% for emulsion with water component 30 and 91% for emulsion 15% and at a demulsifier dose of 12 ppm, when the emulsifier dose was increased, the separation rate increased, reaching 99% with a dose of 16 ppm. The effect of heat on the efficiency of the separation was studied, as the increase in temperature increased the proportion of separated water. While the increase in the percentage of salts in the emulsion gave the opposite result, as the highest separation efficiency was recorded in pure water, and the percentage began to decrease as the percentage of salt increased, finally the study concluded that the combination of chemical demulsifiers and ultrasonic techniques significantly enhances the s","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 5","pages":"558 - 565"},"PeriodicalIF":1.1,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122402","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}

{"title":"Characterizing Heat Transfer Performance in a Slurry Bubble Column Reactor Equipped with a Real Heat Exchanger","authors":"Dalia S. Makki,&nbsp;Hasan Sh. Majdi,&nbsp;Amer A. Abdulrahman,&nbsp;Abbas J. Sultan,&nbsp;Bashar J. Kadhim,&nbsp;Muthanna H. Al-Dahhan","doi":"10.1134/S0965544125040012","DOIUrl":"10.1134/S0965544125040012","url":null,"abstract":"<p>This study examines the impact of equipping a real heat exchanger in a slurry bubble column SBC on instantaneous and local heat transfer coefficients IHTC and LHTC, as well as the overall heat transfer coefficient <i>U</i>, employing advanced heat transfer techniques. The experiments were conducted in a 0.15 m inner diameter Plexiglas SBC with varying gas flowrates Ug (0.14–0.35) m/s at several radial sites along the column’s diameter (±0.18, ±0.46, and ± 0.74) and three axial locations (H/D = 2, 3 and 4). To simulate the industrial Fischer–Tropsch bubble column reactor FT-BCR, a real heat exchanger consisting of 18 copper tubes, each with a diameter of 0.16 m, were vertically installed, occupying 25% of the column cross-sectional. Glass beads with an average size of 150 μm were used loading up to 40% volume to represent the solid phase. The results demonstrated that both, LIHTC and <i>U</i>, showed significant decreases with increasing gas flow rates at all radial and axial positions. Moreover, the LIHTC near the wall notably decreased compared to the central zone by about 82% at the radial location and about 74% at the axial location. The obtained results and data contribute to understanding the impact of vertical tubes on heat transfer in a slurry bubble column reactor SBCR. Furthermore, the data obtained can validate reactor models, computational fluid dynamics CFD programs, and simulations, thereby improving the design and scale-up of these reactors.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 5","pages":"507 - 519"},"PeriodicalIF":1.1,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122152","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}

{"title":"Functionalization of Powdered Walnut Shell with Acid Activation for Congo Red Dye Removal","authors":"Abdul-Azeez H. Mohammed,&nbsp;Haneen A. Kh. Karaghool","doi":"10.1134/S0965544125040024","DOIUrl":"10.1134/S0965544125040024","url":null,"abstract":"<p>Activated carbon was prepared from walnut shells (WS-AC) to study the adsorption mechanism of Congo red (CR) dye in an aqueous solution. The adsorbent was characterized using a Fourier transform infrared spectrophotometer (FT-IR), a scanning electron microscope (SEM), and X-ray diffraction (XRD). The effect of experimental factors, including pH, CR initial concentration, adsorbent dosage, and adsorption time were investigated. 98% of CR dye removal was achieved at pH 2 for 25 mg/L of CR concentration at a 1 g adsorbent dosage at 25°C. The Langmuir and Freundlich models were employed to analyze the data and find the most suitable isothermal model for achieving CR adsorption over WS-AC. The pseudo-first-order (PFO) and pseudo-second-order (PSO) models were used to characterize the CR adsorption kinetics onto the WS-AC adsorbent surfaces. The Langmuir equilibrium model was the most accurate representation of the experimental data. The maximum Langmuir adsorption capacity of WS-AC was determined to be 61.6 mg/g. The kinetic analyses demonstrated that the adsorption of CR over WS-AC followed a pseudo-second-order kinetic model, as evidenced by the high <i>R</i>² values (0.999) found. This work has shown that walnut shell activated carbon is an effective and economical adsorbent for removing Congo red anionic dyes from wastewater.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 5","pages":"520 - 529"},"PeriodicalIF":1.1,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122153","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}

{"title":"Mesophase Production from Fluid Catalytic Cracking Slurry Oil","authors":"Shuang Li,&nbsp;Zhiming Xu,&nbsp;Suoqi Zhao,&nbsp;Lisha Li,&nbsp;Nuo Xu","doi":"10.1134/S0965544123601126","DOIUrl":"10.1134/S0965544123601126","url":null,"abstract":"<p>The raw material used in this study represented fluid catalytic cracking slurry oil (FCC). Fractionated oil (HDAO) was extracted via supercritical continuous deasphalting. Subsequently, mesophase was prepared by a thermal condensation reaction in a reactor using FCC and HDAO. The mesophase formation in FCC and HDAO under varying reaction conditions was analyzed using polarized light microscopy, X-ray diffraction (XRD), and Raman spectroscopy. The study was focused on examining the raw material composition and the effects of different conditions on the mesophase content and the flow domain texture distribution. The results demonstrated that supercritical continuous deasphalting effectively removed the most solid impurities, asphaltene and resin. Furthermore, the presence of an appropriate amount of aliphatic short side chains and 2‒3 ring cycloalkane structures, along with a large amount of four-ring short side-chain aromatic structures provided a formation of a large-domain, high mesophase content, and well-textured mesophase in a short time at high temperatures.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 2","pages":"206 - 217"},"PeriodicalIF":1.1,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162947","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}

{"title":"Synthesis of Mesophase Pitch from Aromatic-Rich Fluid Catalytic Cracking Slurry: Key Advantages","authors":"Mingzhi Wang,&nbsp;Xiaolong Zhou","doi":"10.1134/S0965544123600807","DOIUrl":"10.1134/S0965544123600807","url":null,"abstract":"<p>This study presents FCC-BL, a novel material that can be converted into the mesophase pitch, characterized by a wide-area streamlined optical texture and large domain texture, via the direct thermal polycondensation under optimized reaction conditions. It has an ordered microcrystalline structure and great yield overcoming the difficulty of synthesizing mesophase pitch with a good optical texture in the traditional FCC slurry; Mesophase pitch with a specific anisotropic structure is produced by a continuous screening of reaction conditions and thermal polycondensation, and its properties and structure are characterized and analyzed using the polarizing microscope, FTIR, ¹H NMR, and XRD. The experimental results reveal that mesophase pitch with the optimal performance is obtained at a temperature of 420°C, a pressure of 2 MPa, and a reaction time of 6 h. The resulting mesophase pitch product exhibits a streamlined texture in a large watershed, with a softening point at only 233°C and low impurity content, that makes the material highly suitable for the production of carbon fibers.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 2","pages":"190 - 205"},"PeriodicalIF":1.1,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167921","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}