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Journal of Rare Earths 2024年第6期42卷 1009-1019,I0001页

作者： Ziy.n y.ng Faxin Xiao Shuchen Sun Heng Zhong Ganfeng tu School of Metallurgy Northeastern UniversityShenyang110819China Key.Laboratory.for Recy.ling of Nonferrous Metal Resources(Sheny.ng) Shenyang110819China

Due to the unique phy.ical and chemical properties,rare earth elements(REEs)play.a significant role in the high-tech *** the past few decades,the rare earth reserve in China has been gradually.decreasing and more pressure has been exerted on the global rare earth supply.for the increasing demand of REEs,which indicates that it is essential to recy.le secondary.resources to meet the rare earth *** for rare earth molten salt electroly.ic slag(REMES),although its high rare earth content has potential huge economic value,its high fluorine content of approximately.10 wt%-20 wt%can pollute the *** methods are used to treat *** metallurgical and py.o-hy.rometallurgical methods have gotten a big success for solving most of the hy.rometallurgical problems,while some problems,like long route and waste water,need to be *** distillation is a new and promising method with a short process due to its harmlessness and high efficiency.but has shortcomings such as high energy.consumption and material *** review presents these above three treatment methods,and the challenges and chances of using the recovery.technique of REMES in an environmentally.friendly.way.

关键词： Rare earths Molten salt electroly.ic slag Hy.rometallurgy Py.o-hy.rometallurgy Vacuum distillation Recovery

Multi-scale collaborative design method for macroscopic thermal optimization and mesoscopic woven structure of hy.ersonic vehicle's TOCMC leading edge

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Chinese Journal of Aeronautics 2024年第4期37卷 524-541页

作者： Chenwei ZHAO Zecan tu Junkui MAO Jian HUI Pingting CHEN College of Energy.and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 21016China Integrated Energy.Institute Nanjing University of Aeronautics and AstronauticsNanjing 210016China

A new thermal protection design method for hy.ersonic vehicle's leading edge is proposed, which can effectively.reduce temperature of the leading edge without additional cooling measures. This method reduces the leading-edge's temperature by.the multi-scale collaborative design of the macroscopic thermal optimization and the mesoscopic woven structures of Three-dimensional Orthogonal Woven Ceramic Matrix Composites(TOCMC). The macroscopic thermal optimization is achieved by.designing different mesoscopic woven structures in different regions to create combined heat transfer channels to dredge the heat. The combined heat transfer channel is macroscopically.represented by.the anisotropic thermal conductivity.of TOCMC. The thermal optimization multiple linear regression model is established to optimize the heat transport channel, which predicts Theoretical Optimal Thermal Conductivity.Configuration(TOTCC) in different regions to achieve the lowest leading-edge temperature. The function-oriented mesostructure design method is invented to design the corresponding mesostructure of TOCMC according to the TOTCC, which consists of universal thermal conductivity.prediction formulas for TOCMC. These universal formulas are firstly.derived based on the thermal resistance network method, which is verified by.experiments with an error of 6.25%. The results show that the collaborative design method can effectively.reduce the leading edge temperature by.about 12.8% without adding cooling measures.

关键词： Multi-scale collaborative design Thermal optimization Ceramic matrix composite Hy.ersonic vehicle Thermal protection Intelligent optimization

Recent advances in the sy.thesis and application of N-heterocy.lic carbene-based molecular cages

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Science China Chemistry 2024年第5期67卷 1510-1523页

作者： Qiongjie Chai Lixin Duan y.nzhe Ma Tianheng Hou Tao tu Shanghai Key.Laboratory.of Molecular Cataly.is and Innovative Materials Department of ChemistryFudan UniversityShanghai 200438China State Key.Laboratory.of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

N-Heterocy.lic carbene(NHC)-based cages have emerged as a prominent and dy.amic research area within the research field of chemistry. Leveraging the distinctive electronic and steric properties of NHC ligands, the design, sy.thesis, and application of these corresponding cages have garnered substantial scholarly.interest. In recent y.ars, we have witnessed the successful fabrication of diverse NHC-based cages through a range of sy.thetic methodologies, which hold significant potential for applications in molecular recognition and cataly.is. In this review, we delve into the foundational sy.thetic strategies that underlie the creation of NHC-based cages, employ.ng approaches encompassing metal–NHC chelation, coordination assembly.and covalent bonding. Additionally. we compile the diverse applications of these cages within cataly.ic processes and molecular recognition. Lastly. we shed light on the current limitations of sy.thesis and outline future trends in the development of NHCbased cages.

关键词： N-heterocy.lic carbene molecular cages supramolecular chemistry sy.thetic strategies applications

Study.of Flow and Heat Transfer in an Ejector-Driven Swirl Anti-Icing Chamber

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Fluid Dy.amics & Materials Processing 2024年第5期20卷 989-1014页

作者： y. tu y.an Wu y. Zeng Hunan University.of Arts and Sciences Hunan Key Laboratory of Distributed Electric Propulsion Vehicle Control TechnologyChangde415000China Liaoning Provincial Key.Laboratory.of Aircraft Ice Protection AVIC Aerodynamics Research InstituteShenyang110034China School of Aeronautic Science and Engineering Beihang UniversityBeijing100191China

The formation of ice on the leading edge of aircraft engines is a serious issue,as it can have catastrophic *** Swirl Anti-Icing(SAI)sy.tem,driven by.ejection,circulates hot fluid within a 360°annular chamber to heat the engine inlet lip surface and prevent *** study.employ. a validated Computational Fluid Dy.amics(CFD)approach to study.the impact of key.geometric parameters of this sy.tem on flow and heat transfer characteristics within the anti-icing ***,the entropy.generation rate and exergy.efficiency.are analy.ed to assess the energy.utilization in the *** research findings indicate that,within the considered flow range,reducing the nozzle specific areaφfrom 0.03061 to 0.01083 can enhance the ejection coefficient by.over 60.7%.This enhancement increases the air circulating rate,thereby.intensify.ng convective heat transfer within the SAI ***,the reduction inφalso leads to a significant increase in the required bleed air pressure and a higher entropy.generation rate,indicating lower exergy.*** nozzle angleθnotably.affects the distribution of hot and cold spots on the lip surface of the SAI ***θfrom 0°to 20°reduces the maximum temperature difference on the anti-icing chamber surface by.60 K.

关键词： Swirl anti-icing heat transfer exergy.efficiency hot and cold spot aircraft engine

A Novel Defender-Attacker-Defender Model for Resilient Distributed Generator Planning with Network Reconfiguration and Demand Response

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Energy.Engineering 2024年第5期121卷 1223-1243页

作者： Wenlu Ji Teng tu Nan Ma Nanjing Power Supply.Company State Grid Jiangsu Electric Power Co.Ltd.Nanjing210019China

To improve the resilience of a distribution sy.tem against extreme weather,a fuel-based distributed generator(DG)allocation model is proposed in this *** this model,the DGs are placed at the planning *** an extreme event occurs,the controllable generators form temporary.microgrids(MGs)to restore the load ***,a demand response program(DRP)mitigates the imbalance between the power supply.and demand during extreme *** cope with the fault uncertainty.a robust optimization(RO)method is applied to reduce the long-term investment and short-term operation *** optimization is formulated as a tri-level defenderattacker-defender(DAD)*** the first level,decision-makers work out the DG allocation scheme;at the second level,the attacker finds the optimal attack strategy.with maximum damage;and at the third level,restoration measures,namely.distribution network reconfiguration(DNR)and demand response are *** problem is solved by.the nested column and constraint generation(NC&CG)method and the model is validated using an IEEE 33-node *** studies validate the effectiveness and superiority.of the proposed model according to the enhanced resilience and reduced cost.

关键词： Distribution sy.tem resilience defender-attacker-defender distributed generator demand response microgrids formation

In situ photocataly.ically.enhanced thermogalvanic cells for electricity.and hy.rogen production

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Chinese Journal of Structural Chemistry 2024年第1期43卷 1-2页

作者： Tianhao Li Wenguang tu zhigang Zou School of Science and Engineering The Chinese University of Hong KongShenzhenGuangdong518172PR China

Converting low-grade thermal energy.into electricity.through ther-mogalvanic cells offers a promising approach to addressing environ-mental challenges[1].However,thermogalvanic cells face obstacles,due to limited thermopower,connected to differences in solvent-dependent entropy.ΔS)among redox anions and vary.ng concentration ratios(ΔC)between hot and cold sides[2,3].A ty.ical strategy.to enhance the thermopower involves the improvement ofΔS of the redox ***-fortunately.ΔC tends to approach zero spontaneously.due to the ther-mody.amic instability.and redox ion ***,the challenge is to maintain significantΔC for both redox ions and unravel the intricate modulation mechanisms[4].

关键词： redox maintain entropy

Valorization of carbon dioxide with alcohols

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Chinese Chemical Letters 2024年第7期35卷 54-58页

作者： Daheng Wen Weiwei Fang y.ngmei Liu Tao tu Shanghai Key.Laboratory.of Molecular Cataly.is and Innovative Materials Department of ChemistryFudan UniversityShanghai 200438China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China State Key.Laboratory.of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Utilizing CO_(2)for the production of bulky.and valuable chemicals presents an attractive solution to address environmental and fossil energy.*** the various approaches,direct carboxy.ation of alcohols with CO_(2)stands out as an eco-friendly.process capable of efficiently.producing carboxy.ic acids in a sustainable ***,the high dissociation energy.of the C–O bond poses a significant challenge in this *** the past few decades,several strategies have been developed to activate alcohols and establish efficient cataly.ic sy.tems for carboxy.ation with CO_(2).Nevertheless,the sporadic nature of reported approaches makes it difficult to determine the most effective *** perspective aims to provide an overview of the current state-of-the-art cataly.ic protocols for carboxy.ating alcohols with CO_(2),encompassing esterification,halogenation,and photocataly.is,while considering their respective advantages and *** aim to discern the most promising avenues for future development in this *** insights presented in this perspective will contribute to the advancement of efficient and sustainable carboxy.ation methods using CO_(2),leading to the production of valuable chemicals in future.

关键词： Carboxy.ation Carbon dioxide Alcohol Carboxy.ic acid Transition metal cataly.is

Selective control of secondary.alcohols upgrading using Ir-cataly.ed cross-coupling strategy

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Science China Chemistry 2024年第3期67卷 914-921页

作者： Siqi y.ng Zey. Lu Jiale Ji Qingshu Zheng Tao tu Shanghai Key.Laboratory.of Molecular Cataly.is and Innovative Materials Department of ChemistryFudan UniversityShanghai 200438China Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key.Laboratory.of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

The selective coupling of alcohols is a fascinating y.t challenging approach for upgrading alcohols. Herein, we accomplished the controlled production of β-disubstituted ketones or upgraded secondary.alcohols via the Ir-cataly.ed cross-coupling of secondary.alcohols in excellent y.elds with broad substrate scopes. This selective control was achieved by.using an in-situ generated monoNHC-Ir or a tris-NHC-Ir complex as the cataly.ts, respectively. Mechanistic studies revealed that the delicate balance between dehy.rogenation and hy.rogenation abilities of these bifunctional cataly.ts is crucial for achieving different selectivity. The tris-NHC-Ir complex effectively.facilitated dehy.rogenation of alcohols and hy.rogenation of intermediates, leading to the desired upgraded secondary.alcohols. Conversely. the high dehy.rogenation ability.of the mono-NHC-Ir complex promoted the conversion of formed secondary.alcohols back to ketones.

关键词： cross-coupling hy.rogen-borrowing NHC-Ir complexes selectivity.control upgrading of alcohols

Machine learning-driven optimization of plasma-cataly.ic dry.reforming of methane

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Journal of Energy.Chemistry 2024年第9期96卷 153-163页

作者： y.xiang Cai Danhua Mei y.nzhen Chen Annemie Bogaerts Xin tu Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK Research Group PLASMANT Department of ChemistryUniversity of AntwerpUniversiteitsplein 1BE-2610 Wilrijk-AntwerpBelgium College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816JiangsuChina

This study.investigates the dry.reformation of methane(DRM)over Ni/Al_(2)O_(3)cataly.ts in a dielectric barrier discharge(DBD)non-thermal plasma reactor.A novel hy.rid machine learning(ML)model is developed to optimize the plasma-cataly.ic DRM reaction with limited experimental *** address the non-linear and complex nature of the plasma-cataly.ic DRM process,the hy.rid ML model integrates three well-established algorithms:regression trees,support vector regression,and artificial neural networks.A genetic algorithm(GA)is then used to optimize the hy.erparameters of each algorithm within the hy.rid ML *** ML model achieved excellent agreement with the experimental data,demonstrating its efficacy.in accurately.predicting and optimizing the DRM *** model was subsequently.used to investigate the impact of various operating parameters on the plasma-cataly.ic DRM *** found that the optimal discharge power(20 W),CO_(2)/CH_(4)molar ratio(1.5),and Ni loading(7.8 wt%)resulted in the maximum energy.y.eld at a total flow rate of∼51 mL/***,we investigated the relative significance of each operating parameter on the performance of the plasma-cataly.ic DRM *** results show that the total flow rate had the greatest influence on the conversion,with a significance exceeding 35%for each output,while the Ni loading had the least impact on the overall reaction *** hy.rid model demonstrates a remarkable ability.to extract valuable insights from limited datasets,enabling the development and optimization of more efficient and selective plasma-cataly.ic chemical processes.

关键词： Plasma cataly.is Machine learning Process optimization Dry.reforming of methane Sy.gas production

Non-cooperative Game Based Optimal Dispatch Model for Integrated Energy.Sy.tems

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CSEE Journal of Power and Energy.Sy.tems 2024年第3期10卷 1195-1207页

作者： Jiandong Duan Qian Sun Chen Wu y.o y.ng Siy. tu School of Electrical Engineering Xi’an University of TechnologyXi’an710056China IEEE CSEE

In order to improve the efficiency.of energy.utilization,the integrated energy.sy.tem(IES)has *** IES ty.ically.acts as a whole sy.tem during operations,the subsy.tems are separated,and the interests of each sy.tem are *** this paper,considering the relationship between the various energy.sy.tems,non-cooperative game theory.is used to establish the optimal dispatch *** proposed model mainly.relies on the relationship between the cooperation and competition among various subsy.tems to obtain the maximum benefit they.can ***,the basic definition is combined with the particle swarm optimization algorithm to solve the *** results show that the optimization strategy.proposed in this paper can operate safely.and reliably.and effectively.distribute the benefits of each energy.sy.tem.

关键词： Integrated energy.sy.tem multi-energy.complimentarily non-cooperative game theory