Energy & Fuels最新文献

{"title":"Porous Coral-like Z-Scheme g-C3N4/ZnIn2S4 Heterojunction Xerogel for Promoting CO2 Photoreduction Activity","authors":"Yijing Sun,&nbsp;Mojie Gao,&nbsp;Yanhua Zhang,&nbsp;Huanan Wang,&nbsp;Jili Wen,&nbsp;Kai Huang,&nbsp;Jiayi Wang,&nbsp;Min Li*,&nbsp;Jiang Wu* and Qizhen Liu*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0087010.1021/acs.energyfuels.5c00870","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00870https://doi.org/10.1021/acs.energyfuels.5c00870","url":null,"abstract":"<p >Designing a photocatalyst with high mass transfer efficiency and catalytic activity is a key step in CO₂ capture, utilization, and storage (CCUS) technology systems. Aerogel (or xerogel) materials are regarded as one of the best morphologies for the construction of catalysts because of their unique porous structures. In this work, ZnIn₂S₄ nanosheets were grown on 2D g-C₃N₄ nanoplates by the solvothermal method and formed into xerogel by freeze-drying with a unique coral-like porous structure. The as-prepared composite photocatalyst with a 1:1 mass ratio of g-C₃N₄ and ZnIn₂S₄ demonstrated an impressive CO yield of 2.66 μmol g^–1 h^–1 and the CH₄ production rate was 1.91 μmol g^–1 h^–1, which were increased by 11.08 times and 10.61 times higher than single ZnIn₂S₄. A series of characterizations and DFT calculations revealed the reaction mechanism. This unique porous morphology provides abundant active reaction sites, improves the efficiency of light absorption and utilization, and improves the mass transfer performance. Furthermore, the formation of Z-scheme heterojunctions between the two precursors enhances the production efficiency and transmission performance of photogenerated carriers. This work contributes a new direction in the design of catalyst morphology and offers more insight into the field of CO₂ photoreduction.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10581–10593 10581–10593"},"PeriodicalIF":5.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Hydrogen Storage Efficiency in Organic-Rich Shales Using Silica Nanofluids: A Comprehensive Study on Wettability Alteration","authors":"Amer Alanazi*,&nbsp;Mujahid Ali,&nbsp;Saleh A. Bawazeer,&nbsp;Muhammad Ali,&nbsp;Israa S. Abu-Mahfouz,&nbsp;Zeeshan Tariq,&nbsp;Norah Aljeban,&nbsp;Hussein Rasool Abid,&nbsp;Alireza Keshavarz,&nbsp;Stefan Iglauer and Hussein Hoteit,&nbsp;","doi":"10.1021/acs.energyfuels.4c0621110.1021/acs.energyfuels.4c06211","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06211https://doi.org/10.1021/acs.energyfuels.4c06211","url":null,"abstract":"<p >Underground hydrogen storage (UHS) is an essential method for advancing a hydrogen (H₂)-based economy by enabling safe storage of H₂ in geological formations. Shale formations serve as an appropriate storage medium due to their extensive availability and restricted permeability, both of which are critical for effective hydrogen sequestration. Nevertheless, the presence of organic matter in shale caprocks frequently reduces their sealing efficiency by altering their wettability from predominantly water-wet to H₂-wet, thereby undermining containment. The use of silica (SiO₂) nanofluid as a wettability modifier has been suggested in order to mitigate this difficulty by restoring water-wet conditions and improving the interfacial tension (IFT). This study examines the effects of treatment with various concentrations of silica nanofluid (SiO₂; 0.05–1.0 wt %) to enhance the sealing performance of high total organic carbon (TOC) Jordanian shale samples under actual geological settings (0.5–1600 psi, 323 K) utilizing brine (1 wt % KCl + 2 wt % NaCl). The wettability is evaluated by using the tilted plate method, and the H₂/brine and H₂/shale interfacial tension (IFT) values are determined before and after the treatment. The untreated shale samples exhibit weak water-wet to H₂-wet conditions, signifying inadequate sealing properties. The application of silica nanofluid considerably enhances the wettability, transforming to a pronounced water-wet condition. In the sample with the greatest TOC, the receding contact angle decreases from 82 to 29° with the application of 0.4 wt % SiO₂. In the sample with the lowest TOC, however, only 0.1 wt % SiO₂ is needed to alter the contact angle from 76 to 38° under the same conditions. As the pressure increases, the IFT value of the shale/H₂ system tends to decrease, although a slight increase is observed with relatively high concentrations of silica nanoparticles, thus, suggesting a mechanical barrier effect. This study is the first to investigate the effects of silica nanofluids on actual organic-rich shales, providing a genuine assessment of their application. The results demonstrate the effectiveness of silica nanofluids in improving wettability and sealing efficiency, thus providing a feasible alternative for secure and efficient UHS.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10628–10648 10628–10648"},"PeriodicalIF":5.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Protective In Situ Oxide Layer Formation at a Nonconsumable Iron Anode for Molten Salt Carbon Dioxide Electrolysis","authors":"Jessica Allen*,&nbsp;Mitchell Hunt and Simin Moradmand,&nbsp;","doi":"10.1021/acs.energyfuels.5c0107610.1021/acs.energyfuels.5c01076","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c01076https://doi.org/10.1021/acs.energyfuels.5c01076","url":null,"abstract":"<p >In this work, the apparent stability of an iron anode undergoing oxygen evolution in a ternary molten carbonate salt eutectic ((Li/Na/K)₂CO₃) is investigated at 600 °C. In this system, carbon is produced at the cathode for the overall transformation of carbon dioxide to high-value carbon materials. The high variability in the initial iron electrode electrochemical oxidation response at low potentials is shown to originate from the electrochemical sensitivity toward surface iron oxides, which form at the iron electrode surface under the operational conditions. These result from the interaction with small concentrations of oxygen in the cell gas environment (&lt;3 vol %), chemical reaction of oxides, and iron with the carbonate salts present with both direct and indirect (vapor phase) contact, and electrochemical surface oxidation. Despite the demonstrated high susceptibility of iron toward oxidative corrosion under these conditions, when the partially oxidized iron electrode is polarized to undergo oxygen gas evolution, apparent stability is observed. The corrosion rate for iron electrodes operating under a current density of 300 mA·cm^–2 is estimated to be 3.18–7.68 mm·year^–1, an acceptable range for nonconsumable anodes. The unexpected stability of the iron electrode is ascribed to the formation of specific lithium ferrite species. LiFe₅O₈ is specifically confirmed to be formed, which is suggested here to result from the interaction of evolved oxygen gas (O₂) with oxide (O^2–) present in the carbonate melt to form a highly oxidizing species, peroxide (O₂^2–). LiFe₅O₈ is suggested here to form from the interaction of peroxide, lithium salts, and iron species, demonstrating a novel low-temperature pathway for the formation of this species. The intrinsic oxide species activity and reasonable electrical conductivity of lithium ferrite result in a stable and active final anode surface, which does not appear to rely on careful pretreatment prior to sustained oxygen evolution.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10505–10517 10505–10517"},"PeriodicalIF":5.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.energyfuels.5c01076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-Oil Upgrading: Impact of Phenol on Acetic Acid Esterification with Amberlyst-15","authors":"Erika Bonatti,&nbsp;Natalia Mariano Cabral,&nbsp;Roshni Sajiv Kumar and Josephine M. Hill*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0057710.1021/acs.energyfuels.5c00577","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00577https://doi.org/10.1021/acs.energyfuels.5c00577","url":null,"abstract":"<p >Bio-oil is a complex organic liquid mixture generally derived from biomass pyrolysis that has potential as a sustainable fuel. Its low energy density, corrosiveness, and low stability, however, limit its use. Upgrading technologies such as the esterification of acids can be used, but the impact of the other bio-oil constituents, including phenolic compounds, on this reaction is not well understood. Thus, this work assessed the effect of phenol on the conversion of acetic acid with methanol over Amberlyst-15. At 80 °C and a methanol:acetic acid ratio of 1.6:1 (w/w), the esterification reaction happens without a catalyst in solution. The conversion was the same with or without phenol, reaching 27% after 4 h. In the presence of the solid-acid catalyst, the conversion increased to 90% over the same time. With the addition of phenol in the range of 0.06 to 0.33 (phenol-to-acetic acid mass ratio), the acid conversion decreased by 8%, while a higher ratio (0.60 w/w) had no impact on the conversion, because this higher concentration of phenol could have accelerated the regeneration of acid sites on the Amberlyst-15. A pseudo-first-order reaction in acetic acid was fit to the data and suggested that the addition of phenol did not alter the reaction mechanism. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) revealed that phenol and acetic acid adsorb on the same sites of the Amberlyst-15 structure, but acetic acid adsorbs more strongly, which explained the decrease in the catalyst performance. X-ray photoelectron spectroscopy (XPS) confirmed catalyst surface modifications due to phenol interference. The results showed the formation of noncovalent interactions between phenol and the vinylbenzene sulfonated structure of Amberlyst-15, as well as H···π interactions under distinct environments. Overall, this study highlighted the inhibitory effects of phenol at concentrations lower than 0.60 w/w on solid-acid catalysts, providing insights for upgrading processes.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10424–10434 10424–10434"},"PeriodicalIF":5.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic Pyrolysis of Waste Epoxy Resin over Phosphorus-Modified Activated Carbon for Selective Production of Phenolic Compounds","authors":"Dong-hong Nan,&nbsp;Dan Yan,&nbsp;Yi-yang Zhang,&nbsp;Qi Niu,&nbsp;Xi Luo,&nbsp;Ji-hong Li,&nbsp;Kai Li* and Qiang Lu,&nbsp;","doi":"10.1021/acs.energyfuels.5c0110810.1021/acs.energyfuels.5c01108","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c01108https://doi.org/10.1021/acs.energyfuels.5c01108","url":null,"abstract":"<p >Epoxy resin (ER) is difficult to degrade naturally and it poses significant environmental risks. In this study, walnut shell (WS) was used to prepare phosphorus-doped activated carbon (PAC), which was employed in ER catalytic pyrolysis aimed at phenolic compound production. The effects of PAC preparation (H₃PO₄/WS ratio) and pyrolysis conditions (pyrolysis temperature, PAC/ER ratio) on the yields and selectivity of phenolic compounds were systematically explored. The results indicated that PAC, which possessed a large specific surface area and abundant oxygen-containing functional groups, could initially catalyze ER decomposition to produce phenol and 4-isopropenylphenol, and then further promote the hydrogenation of 4-isopropenylphenol to produce 4-isopropylphenol. When the H₃PO₄/WS ratio was 3, the pyrolysis temperature was set at 500 °C, and the PAC/ER ratio was 1, the total yield and selectivity of phenol and 4-isopropylphenol reached 32.41 wt % and 50.48%, respectively, greatly surpassing the 11.76 wt % and 17.32% observed from ER direct pyrolysis. This study presents a novel approach for the secure and efficient management of waste ER.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10537–10543 10537–10543"},"PeriodicalIF":5.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Coalbed Methane Recovery from Lignite Using CO2 and N2","authors":"Shaicheng Shen,&nbsp;Zhiming Fang*,&nbsp;Xiaochun Li,&nbsp;Quan Jiang,&nbsp;Haimeng Shen and Lu Shi,&nbsp;","doi":"10.1021/acs.energyfuels.5c0175210.1021/acs.energyfuels.5c01752","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c01752https://doi.org/10.1021/acs.energyfuels.5c01752","url":null,"abstract":"<p >Experimental studies on enhanced coalbed methane recovery (ECBM) are crucial for advancing our understanding of gas extraction mechanisms. This investigation evaluates the feasibility of CO₂/N₂-ECBM application in lignite, a coal type that has received limited attention in prior ECBM studies. The adsorption characteristics of carbon dioxide, methane, and nitrogen in lignite were systematically evaluated, followed by comprehensive CO₂/N₂-ECBM experiments employing a self-developed experimental apparatus under various injection strategies. Key findings include the following: (1) At equivalent pressures (0.5–2.5 MPa), the adsorption capacity of carbon dioxide in lignite exceeds that of methane by a factor of 6–7, whereas nitrogen adsorption reaches 78–88% of methane levels. (2) Carbon dioxide injection predominantly occurs through matrix adsorption, achieving 70% storage efficiency with 20% displacement effectiveness. Conversely, nitrogen migration primarily follows fracture networks, yielding 20–24% storage efficiency while enhancing displacement performance. (3) Constant-pressure injection exhibits the lowest methane recovery among tested methods, particularly due to the nondrainable nature of residual methane trapped in semiclosed fracture systems.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10394–10409 10394–10409"},"PeriodicalIF":5.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Precise and High-Throughput Technique for Asphaltene Inhibitor Screening","authors":"Tyler Stenstrom*,&nbsp;Victoria Skates,&nbsp;Graham Drummond and Farshid Mostowfi,&nbsp;","doi":"10.1021/acs.energyfuels.5c0141510.1021/acs.energyfuels.5c01415","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c01415https://doi.org/10.1021/acs.energyfuels.5c01415","url":null,"abstract":"<p >A novel asphaltene deposition apparatus and method are developed that focuses on the diffusion-based, heptane-induced deposition of asphaltenes and enables the screening of asphaltene inhibitors with low oil consumption and with high repeatability. The apparatus comprises a simple 254 mm-long vertically oriented deposition tube with an inner diameter of 4.6 mm that is filled with a mix of oil and <i>n</i>-heptane for 2 h, after which the deposit can be recovered. Optical spectroscopy was used in place of gravimetric analysis to quantify the deposit, which increased the resolution and decreased the oil consumption by decreasing the required surface area relative to other methods. Three oils were tested to validate the method. The repeatability (standard error) in the measurement for a baseline deposit was 5% for two of the oils and 1% for the third. Inhibitor screening and dosage rate studies clearly demonstrated the method’s ability to identify inhibitors that prevent the deposition of asphaltenes in ambient conditions. A comparison between the novel asphaltene deposition method and asphaltene dispersion testing was performed. The results further confirmed that actual deposition should be generated and used instead of precipitation methods when testing inhibitors.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10346–10355 10346–10355"},"PeriodicalIF":5.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-Oil Production via Two-Stage and Direct Hydrothermal Liquefaction Process from High-Protein Monoraphidium sp. KMC4: A Comparative Study of Both Processes and an Insight into the Reaction Pathway","authors":"Pooja Singh,&nbsp; and ,&nbsp;Kaustubha Mohanty*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0106110.1021/acs.energyfuels.5c01061","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c01061https://doi.org/10.1021/acs.energyfuels.5c01061","url":null,"abstract":"<p >Hydrothermal liquefaction (HTL) technology is a process to produce substantial energy resources from potential algae feedstock. However, the high N and O content in wastewater-grown microalgae yields bio-oil with a significant number of heteroatoms, hindering its practical utilization. In this work, the bio-oil generated from direct high-temperature and two-stage hydrothermal liquefaction was compared for its elemental quality and yield. A bio-oil yield of 33.50% was achieved via direct HTL, with high N/C (0.05 mol/mol), H/C (1.36 mol/mol), and O/C (0.11 mol/mol) ratios. The implementation of two-stage hydrothermal liquefaction was applied to increase the H/C and to decrease the N/C of the feedstock, to increase the H/C and to decrease the N/C and the O/C of bio-oil. The aforementioned technology resulted in better bio-oil quality by the prior extraction of carbohydrates and protein components from algae biomass at lower pretreatment temperatures. The bio-oil from direct HTL had a significant number of nitrogen-based compounds (13.36%), i.e., amides, amines, and heterocyclic forms, while it was reduced to 1.98% in the two-stage hydrothermal liquefaction process, confirmed by GC-MS. Also, a reduction of 38% nitrogen in bio-oil was observed from direct HTL compared to two-stage HTL through elemental analysis. The GC-MS results aligned with the elemental analysis of bio-oil from the two-stage hydrothermal liquefaction. The bio-oil produced from two-stage HTL of pretreated microalgae exhibited improved properties, characterized by reduced N-heterocyclic compounds and better elemental composition. The study also formulated the hypothetical reaction pathway during the two-stage HTL. The findings obtained using the two-stage HTL greatly improved the bio-oil characteristics without the expense of reduced yield.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10465–10478 10465–10478"},"PeriodicalIF":5.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 CO2-Induced Geochemical Reactions on Sandstone and Limestone Reservoirs in Mae Moh Basin: Insights from Subcore to Core Scale Analyses","authors":"Mathurot Tulapan,&nbsp;Vorasate Thanasaksukthawee,&nbsp;Chetsada Tapanya,&nbsp;Teerapat Tosuai,&nbsp;Jiatong Jiang,&nbsp;David Harbottle and Suparit Tangparitkul*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0112910.1021/acs.energyfuels.5c01129","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c01129https://doi.org/10.1021/acs.energyfuels.5c01129","url":null,"abstract":"<p >CO₂ capture and storage (CCS) is emerging as a key technology for climate change mitigation, particularly in emerging economies like Thailand, where fossil-based energy remains dominant, yet environmental concerns necessitate sustainable solutions. The Mae Moh Basin, home to a coal-fired power plant and its adjacent mine, has been considered as a potential CCS site. The current study investigates CO₂-induced geochemical reactions in the basin’s sandstone and limestone reservoirs, analyzing mineralogical and physical alterations across subcore to core scales using outcrop samples. Experimental results reveal that both sandstone and limestone undergo mineral dissolution, particularly carbonate dissolution in an acidified CO₂-rich environment. Reprecipitation of minerals was also observed, confirmed through microstructural imaging, X-ray diffraction, and morphological analyses. At the subcore scale, sandstone exhibited microcracks and expanded corrosion pits, while needle-like aragonite crystals reprecipitated on the limestone surface. These geochemical alterations led to increased porosity and permeability, though the effect remained limited due to the low-permeability nature of these tight reservoirs. Computerized tomography (CT) scanning further confirmed pore-space expansion, particularly in limestone, where carbonate dissolution was more pronounced. While CO₂-induced mineral dissolution suggests enhanced injectivity, uncontrolled permeability increases could pose risks of CO₂ migration, potentially affecting long-term containment security. The current findings provide detailed geochemical insights into the Mae Moh Basin’s reservoir properties, although further research─particularly geochemical-geomechanical coupling and field-scale assessments─is necessary to ensure the safe and effective deployment of CO₂ storage in the basin.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10518–10525 10518–10525"},"PeriodicalIF":5.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.energyfuels.5c01129","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasonic Treatment Improves the Synergistic Modification Effect of EVA and Asphaltenes on Nanyang Crude Oil","authors":"Fei Yang,&nbsp;Baiwu Zhu,&nbsp;Chuanxian Li,&nbsp;Guangyu Sun,&nbsp;Yougang Wang,&nbsp;Bo Yao* and Xinyuan Li,&nbsp;","doi":"10.1021/acs.energyfuels.5c0056810.1021/acs.energyfuels.5c00568","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00568https://doi.org/10.1021/acs.energyfuels.5c00568","url":null,"abstract":"<p >The synergistic effect of asphaltenes and PPDs (Pour Point Depressants) on improving the low-temperature rheological properties of waxy crude oils has been extensively studied. Based on these studies, exploring a feasible method to improve the synergistic effect between PPDs and asphaltenes is greatly significant for the safe and economical transportation of waxy crude oils. This paper investigates the effects of different ultrasonic treatment durations (0–30 s, fixed at 20 kHz and 900 W) on the low-temperature fluidity of Nanyang crude oil with/without 100 ppm of EVA. The results of the pour point test, rheological test, DSC test, and microscopic observation show that ultrasonic treatment slightly improves the low-temperature fluidity of Nanyang crude oil without EVA PPDs. However, ultrasonic treatment has a very significant improvement effect on the low-temperature fluidity of Nanyang crude oil containing 100 ppm of EVA, and this effect is improved with the increase of ultrasonic treatment time. This indicates that ultrasonic treatment and EVA have a synergistic effect on the fluidity improvement of Nanyang crude oil. Combined with the results of the asphaltene dispersibility test, the mechanism of the synergistic effect of ultrasonic treatment and EVA on the fluidity improvement of Nanyang crude oil is discussed. Ultrasonic treatment improves the dispersibility of asphaltenes in Nanyang crude oil through cavitation and mechanical vibration, promotes the adsorption of asphaltenes by EVA, and improves the synergistic effect between EVA and asphaltenes. The discovery of this phenomenon enriches the research on the synergistic modification effect of PPDs and asphaltenes on waxy crude oil and provides insights into the application of ultrasonic treatment technology to improve the fluidity of waxy crude oil.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 22","pages":"10304–10313 10304–10313"},"PeriodicalIF":5.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}