Energy & Fuels最新文献

{"title":"H2 Production and CO2 Inhibition during Pyro-Steam Gasification of Municipal Solid Wastes Using a Ni–Zn/CaO-C Catalyst","authors":"Mudassir Hussain Tahir*,&nbsp; and ,&nbsp;Marco Scarsella,&nbsp;","doi":"10.1021/acs.energyfuels.4c0640110.1021/acs.energyfuels.4c06401","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06401https://doi.org/10.1021/acs.energyfuels.4c06401","url":null,"abstract":"<p >The study presents a novel Ni–Zn/CaO-C bimetallic dual-supported catalyst for pyro-steam gasification of municipal solid waste (MSW), designed to enhance the H₂ yield while inhibiting CO₂ production. Key experimental factors, including water flow rate, pyrolysis temperature, reforming temperature, and catalyst composition, were optimized. Zn, as a promoter with Ni, lowers CO₂ emissions and increases H₂ purity, while CaO adsorbs CO₂ and prevents coke deposition on Ni active sites. Char as a carbon support improves the catalytic activity and process sustainability. Ni–Zn/CaO-C demonstrated superior performance with a high H₂ yield (652 mL/g) and low CO₂ yield (80 mL/g), compared to Ni/CaO-C (510 mL/g H₂, 153 mL/g CO₂) under optimal conditions. Characterization via X-ray diffraction analysis (XRD), energy dispersive X-ray (EDX), and thermogravimetric analysis (TGA) confirmed the catalyst’s effectiveness.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5431–5441 5431–5441"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654270","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":"Conversion of Pyrolytic Lignin to Arenes and Cycloalkanes in Consecutive Ethanol and Hydrocarbon Solvents","authors":"Jingkang Shi,&nbsp;Zhongyang Luo*,&nbsp;Qian Qian,&nbsp;Qi Wei,&nbsp;Caixia Song and Evgeny R. Naranov,&nbsp;","doi":"10.1021/acs.energyfuels.4c0628710.1021/acs.energyfuels.4c06287","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06287https://doi.org/10.1021/acs.energyfuels.4c06287","url":null,"abstract":"<p >Pyrolytic lignin was first depolymerized in ethanol to produce low-molecular-weight phenolic compounds, followed by complete hydrodeoxygenation in hydrocarbon solvents, achieving a total yield of 21 wt % of arenes and cycloalkanes (arenes/cycloalkanes molar ratio = 1:5) using a 15% Ni/γ-Al₂O₃ catalyst. Ethanol efficiently dissolves and depolymerizes pyrolytic lignin with or without an external hydrogen source. Through etherification and alkylation, ethanol molecules are added to the side chains of the benzene rings, increasing the carbon length of the final products. However, under harsher conditions, ethanol can produce unwanted side products. It can also compete with phenolic intermediates for catalytically active sites, thereby hindering effective hydrodeoxygenation. In contrast, inert hydrocarbon solvents, which lack oxygen-containing functional groups and thus do not adsorb onto the catalyst active sites, were found to be ideal for promoting complete hydrodeoxygenation. Notably, n-hexadecane provided a higher carbon yield compared to hexane and dodecane due to its liquid state at 300 °C and 2 MPa pressure. Catalysts supported on acidic materials, such as Ni/γ-Al₂O₃, demonstrated higher efficacy in promoting depolymerization and suppressing undesirable condensation reactions compared to basic supports like Pt–Ni/MgO. This two-step approach successfully produced oxygen-free products, which significantly reduces separation costs compared to conventional single-step methods. Future research could focus on optimizing mixed solvent systems that combine the beneficial properties of both ethanol and hydrocarbon solvents to balance solubility and selectivity, thereby improving overall process efficiency, reducing catalyst deactivation, and enhancing product selectivity.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5419–5430 5419–5430"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654343","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":"Supervised Learning to Improve Software for Crude Oil Analysis Using Low-Field NMR Relaxometry","authors":"Salim Ok*,&nbsp;Talha Furkan Canan,&nbsp;Sohaib Kholosy,&nbsp;Shunmugavel Ponnuswamy,&nbsp;Michael Fernandes,&nbsp;Shibu Jose,&nbsp;Mustafa Al-Shamali and Ali Qubian,&nbsp;","doi":"10.1021/acs.energyfuels.4c0539710.1021/acs.energyfuels.4c05397","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c05397https://doi.org/10.1021/acs.energyfuels.4c05397","url":null,"abstract":"<p >An important challenge in the petroleum industry is finding efficient methods to determine the physicochemical characteristics of crude oils, including but not limited to viscosity, density, and sulfur content. The conventional American Society for Testing and Materials (ASTM) methods applied for petroleum characterization are labor-intensive and involve toxic chemicals. These drawbacks have prompted researchers to seek alternative approaches. Among these, the low-field nuclear magnetic resonance (LF-NMR) method has gained significant attention. Despite NMR technology’s long-standing use in the petroleum industry for over 60 years, LF-NMR has recently been adopted due to its cost-effectiveness, ease of operation, and minimal sample preparation requirements. In this contribution, we improved our previously developed software, based on 24 crude oils, in terms of accuracy and precision with 87 crude oil samples. Additionally, we now integrate new features with the supervised learning approach to enhance the fast and reliable identification of crude oils to provide solutions in handling crude oils at different stages, such as production and refinery.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5175–5187 5175–5187"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654377","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":"Review on the Role of Electrofuels in Decarbonizing Hard-to-Abate Transportation Sectors: Advances, Challenges, and Future Directions","authors":"Syed Awais Ali*,&nbsp;Iftikhar Ahmad Bangash,&nbsp;Hamza Sajjad,&nbsp;Malik Abdul Karim,&nbsp;Farooq Ahmad,&nbsp;Mushtaq Ahmad,&nbsp;Khairul Habib,&nbsp;Syed Nasir Shah,&nbsp;Abdul Sami,&nbsp;Zubair Ahmad Laghari and Abdul Qudoos,&nbsp;","doi":"10.1021/acs.energyfuels.4c0618510.1021/acs.energyfuels.4c06185","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06185https://doi.org/10.1021/acs.energyfuels.4c06185","url":null,"abstract":"<p >The transition to sustainable energy systems necessitates efficient decarbonization strategies for hard-to-abate sectors. This review evaluates advancements in electrolysis and CO₂ capture technologies for electrofuel (e-fuel) production, focusing on their potential to enhance efficiency and scalability. Key findings reveal that recent innovations in catalyst design, synthesis chemistry, and process intensification have improved energy conversion efficiencies by up to 20% and reduced production costs by 30–40%. Techno-economic analysis (TEA) and life cycle assessment (LCA) demonstrate that e-fuels can achieve carbon reductions of 70–90% compared to conventional fossil fuels, though their commercial viability hinges on further cost reductions to below $3/kg and robust policy support. Case studies of pilot projects underscore the feasibility of e-fuel integration in aviation, shipping, and long-haul trucking, but highlight challenges in scaling production to meet sectoral demand. Market analysis indicates that supportive regulatory frameworks and infrastructure investments are critical for adoption. In conclusion, while e-fuels offer a promising pathway for decarbonization, achieving widespread commercial deployment will require sustained technological advancements, cost reductions, and coordinated policy interventions.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5051–5098 5051–5098"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654281","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":"Glucose Treatment Enhances Nickel Electrode Quality in Silicon Heterojunction Cells: Experiments and Theoretical Calculations","authors":"Peng Wang,&nbsp;Yang Li,&nbsp;Qi Sun* and Yinxiang Lu*,&nbsp;","doi":"10.1021/acs.energyfuels.4c0627210.1021/acs.energyfuels.4c06272","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06272https://doi.org/10.1021/acs.energyfuels.4c06272","url":null,"abstract":"<p >In the photovoltaic industry, silver paste screen printing is the mainstream metallization technology for crystalline silicon solar cells, but it is hindered by high production costs, particularly when preparing silicon heterojunction cells (SHJ) with low-temperature silver paste. To reduce these costs, electroless plating and electrodeposition technologies as alternatives for silver paste in metal electrode fabrication have gained significant attention. However, achieving a reliable interfacial contact between the metal grid and the transparent conductive oxide (TCO) on the SHJ surface remains a major challenge. This study researched the surface modification of the ITO substrate by introducing glucose molecules to enhance the coating quality of the nickel (Ni) seed layer. The results show that glucose treatment improves the wettability and reduces the roughness of the ITO surface, promoting uniform deposition of the Ni layer, which results in better adhesion and densification. DFT calculation of glucose molecule adsorption also shows that it primarily adsorbs on the ITO surface via its hydroxyl groups (–OH), modulating the surface properties. The modified Ni seed layer shows reduced resistivity, improved Fill Factor (FF = 52.63%), and photoelectric conversion efficiency (PCE = 12.04%), with increases of 5.63% and 0.93% (compared to the control), respectively. Although the PCE is slightly lower than commercial cells, the absence of silver significantly lowers production costs. Thus, glucose modification of the ITO surface effectively enhances electrode contact quality.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5594–5603 5594–5603"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654341","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":"Sodium Chloride Influence on Dissociation Behavior of CO2 Hydrate Below the Melting Point of Ice","authors":"Masato Kida*,&nbsp; and ,&nbsp;Yusuke Jin,&nbsp;","doi":"10.1021/acs.energyfuels.5c0008310.1021/acs.energyfuels.5c00083","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00083https://doi.org/10.1021/acs.energyfuels.5c00083","url":null,"abstract":"&lt;p &gt;Understanding the influence of raw water quality on the stability of the CO&lt;sub&gt;2&lt;/sub&gt; hydrate during transportation to sequestration sites is crucially important for CO&lt;sub&gt;2&lt;/sub&gt; capture and storage involving CO&lt;sub&gt;2&lt;/sub&gt; hydrate transportation. Although raw water purification is a key consideration, the effects of using low-quality waters that are readily available for industrial use remain unclear. To address this issue, this study provides knowledge for the discussion of water quality targets for raw water used to transport CO&lt;sub&gt;2&lt;/sub&gt; using the self-preservation of CO&lt;sub&gt;2&lt;/sub&gt; hydrate. This study evaluated the dissociation behavior of CO&lt;sub&gt;2&lt;/sub&gt; hydrate formed from pure water and 0.0058 and 0.59 mass % NaCl aqueous solutions to elucidate impurity effects on hydrate dissociation behavior. Hydrate dissociation was induced by depressurization and assessed at constant temperatures of 253–272 K and during temperature ramping to ascertain the upper-temperature limit of the self-preservation effect. Hydrate dissociation in the pure water system was restricted at 253–270 K but not at 271 and 272 K, indicating that self-preservation of CO&lt;sub&gt;2&lt;/sub&gt; hydrate appears at temperatures of 253–270 K. The hydrate dissociation was restricted at 253–270 K for the 0.0058 mass % aqueous solution system and at 253 K for the 0.59 mass % aqueous solution system. In these cases, at 269–270 K for the 0.0058 mass % aqueous solution and at 253 K for the 0.59 mass % aqueous solution, the restriction effect of hydrate dissociation tended to be weak: The self-preservation of the CO&lt;sub&gt;2&lt;/sub&gt; hydrate does not appear or is weakened even at temperatures where the self-preservation is fundamentally apparent. Temperature ramping measurements of the hydrate dissociation behavior elucidated that the temperature at which the self-preservation phenomenon of CO&lt;sub&gt;2&lt;/sub&gt; hydrate disappears was almost constant at approximately 271 K, irrespective of the temperature in the pure water system. At 253–267 K, the addition of NaCl lowered the temperature at which the self-preserving effect of the CO&lt;sub&gt;2&lt;/sub&gt; hydrate disappeared. Moreover, the decrease in the temperature was greater with increased NaCl concentration. In the NaCl aqueous solution system at 268–270 K, where the initial hydrate dissociation amount was much greater and the restriction effect of hydrate dissociation was weak, the temperature at which the self-preservation phenomenon of the CO&lt;sub&gt;2&lt;/sub&gt; hydrate disappears was as high as that in the pure water system. This fact suggests that the large amounts of ice around the hydrate grain shield the remaining hydrate particles from erosion by NaCl. Findings show that the CO&lt;sub&gt;2&lt;/sub&gt; hydrate dissociation is controlled by competition between the formation and growth of ice related to the self-preservation phenomenon and the inhibition of ice formation by erosion of NaCl from the surroundings. These findings suggest that, for CO&lt;sub&gt;2&lt;/sub&gt; hydrate","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5511–5521 5511–5521"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654345","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":"How Green is Green Hydrogen?─A Life-Cycle and Critical Raw Material Analysis of Green Hydrogen Production via PEMW Electrolysers in India","authors":"Peter Waiyaki,&nbsp;Ramprasad Thekkethil,&nbsp;Murali Ananthakumar and Satyanarayanan Seshadri*,&nbsp;","doi":"10.1021/acs.energyfuels.4c0420010.1021/acs.energyfuels.4c04200","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c04200https://doi.org/10.1021/acs.energyfuels.4c04200","url":null,"abstract":"<p >The rapid progression of digitalization, decarbonisation, and democratisation within the energy system is accelerating the energy transition. To expedite this progress and achieve the Paris Agreement’s net-zero objectives in India, there is a requisite need to enhance existing infrastructure and expand innovative technologies, such as green hydrogen production. Green hydrogen is pivotal as an energy carrier within power-to-X processes. The safe, sustainable, and compliant production of green hydrogen necessitates the establishment of well-informed voluntary standards and regulations overseeing the production, labeling, and trade of green hydrogen and its derivatives. This study initially investigates the environmental impact implications of scaling up green hydrogen production to a megawatt-scale, employing two distinct configurations of the PEMW electrolysis system through a life cycle assessment. Given the high dependency of PEMW electrolysis systems on critical materials, such as platinum, a critical raw material analysis is performed to identify the essential raw materials that should be prioritised in India for this upscaling endeavor. The life cycle and critical raw material analysis findings reveal that the diverging configurations of the PEMW electrolysis system exhibit significantly different environmental impacts and critical raw material demands. This underscores the necessity for voluntary standards and regulations in the green hydrogen production process to facilitate the definition of green hydrogen and promote seamless cross-border trade from India to other global markets.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5534–5549 5534–5549"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654280","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":"Moderately Solvating Ionic Liquid Electrolytes for High-Performance Lithium Metal Batteries","authors":"Wenjing Lin,&nbsp;Daoyuan Chen,&nbsp;Penghe Lin,&nbsp;Jidao Li,&nbsp;Quan Lu,&nbsp;Yanyan Zhang*,&nbsp;Wenhong Zou*,&nbsp;Yuxin Tang and Zhengshuai Bai*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0045010.1021/acs.energyfuels.5c00450","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00450https://doi.org/10.1021/acs.energyfuels.5c00450","url":null,"abstract":"<p >Development of ionic liquid electrolytes (ILEs) plays a key role in achieving high safety and high energy density in lithium metal batteries. While introducing cosolvents can reduce the viscosity of ILEs and enhance Li⁺ transport ability, the impact of the solvating ability of cosolvents on the solvation structure of ILEs remains unclear. In this work, we rationally design the solvating ILEs, with different solvation abilities of cosolvents, and reveal the correlation between solvation structure and electrochemical performance. We found that introducing cosolvents with moderate solvating ability, such as ethyl acetate (EA), into the ionic liquid electrolyte can regulate the solvation structure of ILEs, thereby optimizing Li⁺ transport ability and enhancing the stability of the electrode/electrolyte interface. With our designed ionic liquid electrolytes (ILEs), the Li||Ni_0.8Co_0.1Mn_0.1O₂ battery cell demonstrates exceptional capacity retention of 84.8% after 800 cycles at 1.0C, significantly outperforming the battery with a conventional ester electrolyte, which retains only 22.1% capacity. This study provides practical solutions and foundational guidance for the rational design of advanced ionic liquid electrolytes and the selection of cosolvents, advancing the development of high-safety and high-energy-density LMBs.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5622–5632 5622–5632"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654346","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":"Outlook on Synthetic Biology-Driven Hydrogen Production: Lessons from Algal Photosynthesis Applied to Cyanobacteria","authors":"Alfonso Jaramillo*,&nbsp;Alessandro Satta,&nbsp;Filipe Pinto,&nbsp;Cecilia Faraloni,&nbsp;Graziella Chini Zittelli,&nbsp;Ana Margarita Silva Benavides,&nbsp;Giuseppe Torzillo,&nbsp;Conrad Schumann,&nbsp;Jorge Fernández Méndez,&nbsp;Gustav Berggren,&nbsp;Peter Lindblad,&nbsp;Maddalena Parente,&nbsp;Serena Esposito and Marcello Diano,&nbsp;","doi":"10.1021/acs.energyfuels.4c0477210.1021/acs.energyfuels.4c04772","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c04772https://doi.org/10.1021/acs.energyfuels.4c04772","url":null,"abstract":"<p >Photobiological hydrogen production offers a sustainable route to clean energy by harnessing solar energy through photosynthetic microorganisms. The pioneering sulfur-deprivation technique developed by Melis and colleagues in the green alga <i>Chlamydomonas reinhardtii</i> successfully enabled sustained hydrogen production by downregulating photosystem II (PSII) activity to reduce oxygen evolution, creating anaerobic conditions necessary for hydrogenase activity. Inspired by this approach, we present the project of the European consortium PhotoSynH2, which builds on these biological insights and employs synthetic biology to replicate and enhance this strategy in cyanobacteria, specifically, <i>Synechocystis</i> sp. PCC 6803. By genetically engineering precise downregulation of PSII, we aim to reduce oxygen evolution without the unintended effects associated with nutrient deprivation, enabling efficient hydrogen production. Additionally, re-engineering endogenous respiration to continuously replenish glycogen consumed during respiration allows matching oxygen production with consumption, maintaining anaerobic conditions conducive to hydrogen production. This review discusses how focusing on molecular-level processes and leveraging advanced genetic tools can lead to a new methodology that potentially offers improved results over traditional approaches. By redirecting electron flow and optimizing redox pathways, we seek to enhance hydrogen production efficiency in cyanobacteria. Our approach demonstrates how harnessing photosynthesis through synthetic biology can contribute to scalable and sustainable hydrogen production, addressing the growing demand for renewable energy and advancing toward a carbon-neutral future.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"4987–5006 4987–5006"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.energyfuels.4c04772","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654376","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":"Adsorption–Desorption–Seepage Characteristics and Deformation Mechanism of Confined Coal for Flue Gas under Different Water Saturations","authors":"Yang Ding*,&nbsp;Yuyao Zhou,&nbsp;Shugang Li,&nbsp;Haifei Lin,&nbsp;Bing Zhu,&nbsp;Yizheng Zhang,&nbsp;Yan Zhang and Ye Bian,&nbsp;","doi":"10.1021/acs.energyfuels.5c0006610.1021/acs.energyfuels.5c00066","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00066https://doi.org/10.1021/acs.energyfuels.5c00066","url":null,"abstract":"<p >The excessive discharge of flue gas degrades air quality, while its injection into coal seams mitigates pollution and enables carbon dioxide storage. This study investigates the adsorption, desorption, and seepage mechanisms of flue gas in coal seams through gas–solid coupling tests under triaxial stress for coal samples with varying water saturation. The results indicate that under constant coaxial and confining pressures, the adsorption capacity, desorption capacity, and seepage rate of flue gas exhibit a significant decline with increasing water saturation. Additionally, the equilibrium times for desorption and seepage are reduced, while the equilibrium time for adsorption is extended. During the processes of adsorption, desorption, and seepage, both axial and radial strains in the coal decrease with increasing water saturation or axial/confining pressure, with the axial strain consistently lower than the radial strain. Gas component analysis reveals nitrogen (N₂) dominance during initial desorption, with carbon dioxide (CO₂) and methane (CH₄) increasing as desorption progresses. Further analysis demonstrates a significant linear relationship between the axial and radial strains of coal and the gas seepage rate. As the effective stress or water saturation increases, both the diffusion coefficient and dimensionless permeability exhibit a declining trend under the same water saturation conditions. Under dry conditions, the effective stress sensitivity coefficient decreases with increasing effective stress. In contrast, under high water saturation conditions, the effective stress sensitivity coefficient displays a more complex pattern, becoming more pronounced as water saturation rises. These studies help to understand the influence of water saturation and stress on the behavior of flue gas in coal and provide a theoretical basis for optimizing coal bed methane extraction and carbon sequestration.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 11","pages":"5491–5510 5491–5510"},"PeriodicalIF":5.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654344","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}