Journal of Physics: Conference Series最新文献

{"title":"Enhanced coalbed methane recovery by microwave-induced thermal fracture","authors":"Song Wu, Shen Li, Shuxia Yuan, Bintao Guo and Quansen Niu","doi":"10.1088/1742-6596/2838/1/012005","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012005","url":null,"abstract":"The investigation on microwave-induced permeabilization and response of coal under microwave heating is of great significance for the industrial application of microwave heating technology instead of traditional heating in coalbed methane mining. Santanghu coal is used as a sample to measure the permeability and porosity of coal samples before and after microwave heating. The fracture changes of coal samples before and after heating are compared to observe the penetration effect of microwaves on coal samples. Based on the technology of directional drilling and continuous tubing technology in petroleum engineering, a technology of increasing the production of coalbed methane by microwave heating in a wide range of coal seams is proposed. The feasibility of this enhanced production method is validated through COMSOL Multiphysics simulations, which model the temperature field distribution within coal seams under various microwave parameters. This approach highlights the potential of microwave technology in coalbed methane recovery. The results show that: (1) the thermal field of coal samples under microwave heating is inhomogeneous. The average length and area of the cracks of the coal samples increased under microwave radiation, and the cracking of the coal samples confirmed the cracking effect of microwaves on the coal samples. (2) With prolonged microwave heating, coal samples exhibit an initial decrease followed by an increase in porosity and permeability, a trend attributed to the expansion of solid particles that occupy and reduce pore spaces. (3) The in-situ microwave heating technique for coalbed methane extraction overcomes the challenges of long-distance microwave transmission loss and methane backflow in transmission pipelines, utilizing continuous pipelines for extensive microwave heating of coal seams. (4) The microwave power and intermittent heating duration have a significant effect on the temperature field distribution of the coal seam, and when the heating duration is 60 days, 1600 W is used to have an effective temperature field distribution while avoiding the waste of heat. When the power is constant at 1600 W, the effective temperature range is wider when the intermittent heating duration is 60 days.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrafast reaction kinetic of polyaniline in flexible hydrogel electrodes facilitated by graphene ribbons","authors":"Pengfei Gao and Zhuangjun Fan","doi":"10.1088/1742-6596/2838/1/012007","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012007","url":null,"abstract":"By loading energy storage active materials on hydrogel which is inherently flexible, the flexibility of electrode materials can be simply realized, thereby achieving the flexibility of energy storage devices. However, the polymer network that constructs the three-dimensional skeleton of the hydrogel is not conductive, which inhibits the redox ability of the active material. If a high speed conductive structure can be added to the colloidal phase, the performance of the flexible electrode material can be greatly improved. Here, we introduce redox graphene ribbons into the polyvinyl alcohol hydrogel loaded with polyaniline. The in situ three-dimensional conductive graphene network greatly enhanced the conductivity of the hydrogel electrode, thus increasing the specific capacitance to as high as 1117 F g−1 at 2 mg cm−2 mass loading, with a retention ratio of 66.96% from 0.5 A g−1 to 20 A g−1. These highlighted properties enable the PRP hydrogel as an electrode for flexible supercapacitors, which provides a promising possibility for the practical application of wearable electronics.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and performance study of organic small molecule photovoltaic donor materials in solar cells","authors":"Ping Xiong, Ning Fu and Yifan Zhang","doi":"10.1088/1742-6596/2838/1/012006","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012006","url":null,"abstract":"In this study, PDPAT-BDT-BT was used as a donor material, combined with PC61BM and PC71BM as acceptor materials, to prepare a hybrid thin film for organic solar cells. In photovoltaic performance tests, this film shows advantages and good characteristics. The experimental results show that the PDPAT-BDT-BT polymer shows good performance in terms of thermal stability, optical properties, and electrochemical properties. It also shows better photovoltaic performance in the hybrid system with PC71BM, which lays a good foundation for its potential application in organic solar cells.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controllable Oil Adsorption from water Using Hydrophobic (Paraffin/Stearic Acid)/CoFe2O4 Magnetized Fibril Wax","authors":"M. M. Ghobashy","doi":"10.1088/1742-6596/2830/1/012005","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/012005","url":null,"abstract":"The development of efficient oil-water separation techniques is critical for mitigating environmental pollution from industrial oily wastewater. This study synthesized a hydrophobic and oleophilic (paraffin/stearic acid) (Par/St)/CoFe2O4 magnetized fibril wax for controllable adsorption and removal of waste engine oil from water. Structural and morphological characterization confirmed the successful incorporation of 30 wt% CoFe2O4 nanoparticles into the Par/St wax matrix with fibril morphology. Structural and morphological characterization using TEM, UV-Vis, FTIR, XRD, and SEM consistently confirmed the successful integration of CoFe2O4 nanoparticles into the Par/St wax matrix, forming fibrils with a high surface area. The oleophilic fibril demonstrated rapid adsorption and excellent removal efficiency of 99% for waste engine oil within 30 seconds. The fibrils could be magnetically guided for oil collection, ensuring reusable and eco-friendly oil remediation. This work introduces a novel solution for controllable oil spill clean-up and oily wastewater treatment.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decarbonizing natural gas infrastructure: blending hydrogen for sustainable energy","authors":"Z I Tawfik, S T El-Sheltawy and A R Abdelghany","doi":"10.1088/1742-6596/2830/1/012007","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/012007","url":null,"abstract":"The paper explores the potential of hydrogen as a clean energy carrier and its integration into existing natural gas systems to reduce carbon intensity. It highlights the need for infrastructure impact studies and significant investment to realize the vision of green hydrogen. It also discusses the properties of hydrogen compared to natural gas, its production methods, and the potential for blending hydrogen into existing natural gas pipelines. Additionally, it provides insights into Egypt’s energy sector and its efforts to embrace renewable energy. It concludes by summarizing notable studies and projects related to hydrogen-natural gas blending. The blending of hydrogen into natural gas systems is an important and achievable first step towards full conversion to 100% hydrogen. The paper presents a compilation of hydrogen blending projects from different countries, showcasing the collaborative efforts and advancements in integrating hydrogen into existing energy systems.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anti-corrosive properties of vermiculite-enhanced waterborne epoxy resins with two-dimensional exfoliation","authors":"Zhiyuan Li, Lisha Ren, Tong Wei and Zhuangjun Fan","doi":"10.1088/1742-6596/2838/1/012008","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012008","url":null,"abstract":"Although waterborne epoxy resin coatings are widely used in the field of anti-corrosion, micropores and micro defects in their coatings are the key factors restricting their further development. The exfoliated vermiculite was stripped by a physical one-step stripping method, with good water dispersion and dense lamellar structure. As the nano-filler, it can effectively fill the micro defects in the coating, make the coating structure more compact, and effectively prevent the intrusion of corrosive media. When exfoliated vermiculite was added at 1%, two orders of magnitude increased the electrochemical impedance modulus to 2.276×106 Ω cm2 and the corrosion current was correspondingly reduced to 1.186×10−8 A cm−2, showing excellent corrosion resistance. Adding 1% exfoliated vermiculite creates a “labyrinth effect” in the coating that extends the penetration path of the corrosion particles, thus effectively preventing corrosion of the underlying metal substrate. This enables the coating to better cope with harsh corrosive environments and provides a viable idea for coating protection.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of Nanyang crude oil by a functional magnetically responsive flow modifier in synergy with magnetic field","authors":"Feng Yan, Jionghao Li, Qifu Li, Yunchen Wang, Chaofei Nie, Fan Xiao and Bohong San","doi":"10.1088/1742-6596/2838/1/012001","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012001","url":null,"abstract":"Nanyang crude oil is classified as high wax crude oil. It has severe wax deposition and poor low-temperature fluidity, which pose a major risk to the safety of pipeline transportation of wax-containing crude oil. A large-size polymer-coated magnetic nanosphere was created by dispersion polymerization employing methyl methacrylate, nano-iron oxide, tetraethoxysilane, and dodecyltriethoxysilane as raw materials to address the aforementioned issues.Ethylene-vinyl acetate copolymer was compounded to provide a useful magnetic response flow modifier.Using FTIR and ESEM, the polymer grafted on the iron oxide nanosphere’s surface was shown. After evaluating the functional magnetic response flow modifier’s impact on the yield stress and viscosity of a Nanyang crude oil, the effect of the magnetic field was introduced to analyze the functional magnetic response flow modifier’s synergistic effect on viscosity and yield stress. The results show that the functional magnetic response flow modifier may greatly lower yield stress and viscosity when compared to the EVA pour point depressant. Additionally, applying an alternating magnetic field could amplify the functional magnetic response flow modifier’s beneficial effects on Nanyang crude oil.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrosion Resistance Improvement of Mild Steel","authors":"M Sheashea, B Zagloul, M Zorainy, I Naeem and M Gobara","doi":"10.1088/1742-6596/2830/1/012002","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/012002","url":null,"abstract":"Corrosion’s devastating consequences have become a big issue all over the world. One of the corrosion damage aspects are related to decontamination solutions which are essential for rapid degradation of toxic agents. The decontamination solutions should be non-corrosive to avoid deterioration of steel container. Decontamination solutions comprising have high chlorinating activity so they have a corrosive effect on mild which are used in fabrication of storage tanks. In this case, using inhibitors is one of the most effective strategies to limit the rate of corrosion. This work describes the effect of different compounds; (zinc chromate, cinnamaldehyde, sodium tripolyphosphate, zinc ortho-phosphate, ammonium molybdate and thiourea) on the rate of corrosion of mild steel within dichloroisocyanuric acid decontamination solution. Meanwhile, these inhibitors should not affect active chlorine content which is responsible for the decontamination process. By using kelthoff and AquaChec® methods for measuring active chlorine, it was found that only zinc chromate passed the tests. For measuring electrochemical behaviour of mild steel in decontamination solutions, different techniques were used. Zinc chromate inhibition on mild steel in a 0.5% dichloroisocyanuric acid solution at different temperatures (298–313 K) were studied utilising electrochemical impedance spectroscopy, weight loss, and potentiodynamic polarisation. The results reveal that zinc chromate is an excellent mild steel corrosion inhibitor in dichloroisocyanuric acid, with an inhibition efficacy of 96% at a concentration of 0.005 M. Finally, surface morphology of mild was also investigated using SEM.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"206 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peer Review Statement","authors":"","doi":"10.1088/1742-6596/2838/1/011002","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/011002","url":null,"abstract":"All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Single Anonymous • Conference submission management system: Morressier • Number of submissions received: 86 • Number of submissions sent for review: 74 • Number of submissions accepted: 45 • Acceptance Rate (Submissions Accepted / Submissions Received × 100): 52.3 • Average number of reviews per paper: 3 • Total number of reviewers involved: 10 • Contact person for queries: Name: Xuexia Email: xx.ye@keoaeic.org Affiliation: AEIC Academic Exchange Information Centre","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep Reinforcement Learning-based Collaborative Multi-UAV Coverage Path Planning","authors":"Boquan Zhang, Tian Jing, Xiang Lin, Yanru Cui, Yifan Zhu, Zhi Zhu","doi":"10.1088/1742-6596/2833/1/012017","DOIUrl":"https://doi.org/10.1088/1742-6596/2833/1/012017","url":null,"abstract":"The coverage path planning problem has gained significant attention in research due to its wide applicability and practical value in various fields such as logistics and distribution, smart homes, and unmanned vehicles. This paper focuses on studying the coverage path planning problem under multi-UAV collaboration to maximize the coverage of the mission area within a given time. To address this problem, we propose a multi-objective optimization model and reformulate it with the framework of Decentralized Partially Observable Markov Decision Process (Dec-POMDP). We then employ a multi-agent deep reinforcement learning (MADRL) method to solve the problem. Specifically, we introduce the <italic toggle=\"yes\">ε</italic>—Multi-Agent Twin Delayed Deep Deterministic Policy Gradient (<italic toggle=\"yes\">ε</italic>—MADT3), which incorporates an exploration coefficient based on MATD3. This coefficient gradually decays with the number of iterations, allowing for a balance between exploration and exploitation. Numerous simulation results demonstrate that <italic toggle=\"yes\">ε</italic>—MADT3 outperforms the baseline algorithm in terms of coverage rate and number of collisions.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}