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Synergy of heterogeneous Co/Ni dual atoms enabling selective C-O bond scission of lignin coupling with in-situ N-functionalization

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Journal of Energy Chemistry 2024年第5期92卷 16-25页

作者： Baoyu Wang Jinshu Huang Hongguo Wu Ximing Yan Yuhe Liao Hu Li National Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide&Agricultural BioengineeringMinistry of EducationState-Local Joint Laboratory for Comprehensive Utilization of BiomassCollege of Pharmacy&Center for R&D of Fine ChemicalsGuizhou UniversityGuiyang 550025GuizhouChina Guangxi Key Laboratory of Green Chemical Materials and Safety Technology Beibu Gulf UniversityQinzhou 535011GuangxiChina Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640GuangdongChina

Selective cleavage of Csp^(2)-OCH_(3)bond in lignin without breaking other types of C-O bonds followed by N-functionalization is fascinating for on-purpose valorization of ***,a Co/Ni-based dual-atom catalyst CoNidA@NC prepared by in-situ evaporation and acid-etching of metal species from tailor-made metal–organic frameworks was efficient for reductive upgrading of various lignin-derived phenols to cyclohexanols(88.5%–99.9%yields),which had ca.4 times higher reaction rate than the single-atom catalyst and was superior to state-of-the-art heterogeneous *** synergistic catalysis of Co/Ni dual atoms facilitated both hydrogen dissociation and hydrogenolysis steps,and could optimize adsorption configuration of lignin-derived methoxylated phenols to further favor the Csp^(2)-OCH_(3)cleavage,as elaborated by theoretical ***,the CoNi_(dA)@NC catalyst was highly recyclable,and exhibited excellent demethoxylation performance(77.1%yield)in real lignin monomer *** in-situ cascade conversion processes assisted by dual-atom catalysis,various high-value N-containing chemicals,including caprolactams and cyclohexylamines,could be produced from lignin.

关键词： Biomass conversion Heterogeneous catalysis Lignin dual-atom catalyst Selective C-ocleavage

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Measurement and analysis of acoustic characteristics of panel type sensor arrays in an open water tank 24

Measurement and analysis of acoustic characteristics of pane...

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24th International Congress on Acoustics, ICA 2022

作者： Kim, Kyungseop Pyo, Seonghun Kwon, Byung-Jin Chang, Woosuk Lee, Jeong-Min Agency for Defense Development Maritime Technology Research Institute Korea Republic of LIG Nex1 Co. Ltd. Maritime R&D Lab. Korea Republic of

A new method is presented for acoustic measurement of a panel type sensor module in open water tank. The method utilizes the data from the hydrophones, which have in-plane three different positions, of the sensor module. It provides an estimation of the edge-diffracted pressure field as well as the sensor receiving field (incident/reflected pressure) for the finite-sized module. The method is applied on the synthetic and experimental data to confirm the validity. diffraction effects on the measurement of the acoustic characteristics are examined, and distribution characteristics of scattering sound field around panels according to sample size and composition of the panel materials are also analyzed. © ICA *** rights reserved

关键词： Acoustic measurement diffraction Panel

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Hybrid Complex Proportional Assessment-Multi-objective Grey Wolf Optimizer for Biodiesel Process Optimization 1

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7th International Conference on Intelligent Computing and Optimization, ICO 2023

作者： Shanmugasundar, G. Chohan, Jasgurpreet Singh Kalita, Kanak Department of Mechanical Engineering Sri Sairam Institute of Technology Chennai600044 India Department of Mechanical Engineering and University Centre for Research & Development Chandigarh University Mohali140413 India Department of Mechanical Engineering Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Chennai India Jadara University Research Center Jadara University Irbid Jordan

ISBN: (数字)9783031733215

ISBN: (纸本)9783031733208

In this study, a hybrid COPrAS-MOGWO (Complex Proportional Assessment-Multi-Objective Grey Wolf Optimizer) optimization approach is proposed for optimizing biodiesel production. The performance of the MOGWO is compared with Non-dominated Sorting Genetic Algorithm II (NSGA-II). Optimization of biodiesel production from waste frying soybean oil through transesterification is considered as the case study to test the proposed algorithm. The research aims to minimize energy consumption and maximize reaction conversion and green chemistry balance simultaneously. results indicate that MOGWO outperforms NSGA-II in terms of computational time and solution quality. Furthermore, the same best compromise solution (BCS) is identified by COPrAS across different weight-based scenarios. By comparing the relative performance of NSGA-II and MOGWO, this study contributes valuable insights into multi-objective optimization in biodiesel production and provides guidance for researchers and practitioners in selecting appropriate optimization algorithms to improve the efficiency and sustainability of biodiesel production processes. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Cleaner production

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A Novel Oxidative Leaching of NdCeFeB Magnets for Selective recovery of rare Earth Elements 12th

A Novel Oxidative Leaching of NdCeFeB Magnets for Selective ...

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12th Symposium on rare Metal Extraction and Processing, 2025 was part of the 154th Annual Meeting and Exhibition, TMS 2025

作者： Borra, Venkata Lakshmi Visarada, Thupakula Ghana Venkatesan, Prakash Önal, Mehmet Ali recai Borra, Chenna rao Department of Metallurgical and Materials Engineering Indian Institute of Technology Kharagpur West Bengal721302 India R&D Tata Steel Ltd Jamshedpur831001 India Université Libre de Bruxelles 50 Avenue FD Roosevelt CP165/63 1050 Brussels Belgium GenoMines 630 Rue Noetzlin Paris91190 France

ISBN: (纸本)9783031811814

In certain applications, cerium (Ce) is partially substituted for neodymium (Nd) in NdFeB magnetsNdFeB magnets to balance rare earth elementsrare earth elements (rEEs) consumption where lower magnetic strength is acceptable. The global rEEs market volume is anticipated to exceed USd 8 billion by 2032, with a compound annual growth rate of 10% expected between 2024 and 2032. recyclingrecycling rEEs from secondary sources could help mitigate this growing demand. This study presents a recyclingrecycling process that involves oxidation leachingLeaching of NdCeFeB magnetsNdCeFeB magnets by varying HCl amount with and without supply of air, where air helps in oxidation of co-dissolved iron from Fe2+ to Fe3+ and selectively dissolves and separates rEEs from the magnetsMagnets. Oxalic acid precipitation was employed to convert rare earthrare earth salts into their corresponding oxalates, which were subsequently calcined to produce mixed rare earthrare earth oxide (rEO). Xrd, XrF, and SEM–EdX analysis confirmed that the overall recovery yield of rEO exceeded 95%, with a 99% purity over other impurities when HCl was used in conjunction with air supply. This innovative process not only minimizes acid and other reagent consumption but also generates goethite (FeOOH) as a valuable by-product. © The Minerals, Metals & materials Society 2025.

关键词： recycling

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MErEC-MABAC Based-Parametric Optimization of Chemical Vapour deposition Process for diamond-Like Carbon Coatings 6th

MEREC-MABAC Based-Parametric Optimization of Chemical Vapour...

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6th International Conference on Intelligent Computing and Optimization, ICO 2023

作者： Prabhukumar, Sellamuthu Chohan, Jasgurpeet Singh Kalita, Kanak Department of Mechanical Engineering Presidency University Bangalore India Department of Mechanical Engineering University Centre for Research and Development Chandigarh University Mohali India Department of Mechanical Engineering Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology Avadi India

ISBN: (纸本)9783031501579

This research paper presents an application of the Multi-attributive Border Approximation Area Comparison (MABAC) method combined with the Method based on the removal Effects of Criteria (MErEC) for the parametric optimization of the Chemical Vapor deposition (CVd) process in diamond-like Carbon (dLC) coatings. A decision matrix is formulated using a case study from the literature. Four response parameters namely, Hardness (H), Young’s modulus (E), Coefficient of Friction (COF), and Wear rate (Wr) are considered. The weight allocation for these response parameters is calculated using five different methods, namely MErEC, mean weight (Mean), Standard deviation (Stdev), Entropy, and Criteria Importance Through Intercriteria Correlation (CrITIC) method. The MABAC method was employed to obtain the optimal parametric combination for the dLC coatings. results showed a clear superior combination of the CVd process parameters can be achieved using the MErEC-MABAC methodology. Thus, the study successfully demonstrates the effectiveness of the MErEC-MABAC-based approach for the simultaneous optimization of multiple responses in the CVd process for dLC coatings. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Coatings

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dynamic microstructure evolution and mechanical properties of dilute Mg-Al-Ca-Mn alloy during hot rolling

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Journal of materials Science & technology 2022年第34期129卷 1-14页

作者： Shiwei Xu Congcong Zhu Zhanhong Lin Chen Jin S.Kamado K.Oh-ishi Yun Qin College of Materials Science and Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China Qinghai Salt Lake Teli Magnesium Co.Ltd. Xining 810000China Department of Mechanical Engineering Nagaoka University of TechnologyNagaoka 940-2188Japan Toyota Central R&D Labs. Inc.41-1 YokomichiNagakuteAichi 480-1192Japan Research Institute(R&D Centre) Baowu Steel Group CorporationShanghai 201900China

The dynamic microstructure and texture of dilute Mg-0.50Al-0.71Ca-0.33Mn(wt.%) during hot rolling at two slab temperatures were investigated by electron backscattered diffraction(EBSd) and high resolution transmission electron microscopy(HrTEM). The results show that the development of the rolling microstructures is to first form {10–12} extension twins in the original grains, thereby forming the extension-twinned regions, and then to further form {10–11}-{10–12} double twins and kinks in the extension-twinned regions, and finally to form continuous dynamic recrystallized(continuous drXed)grains in the double twins and the cross parts of the shear-deformed coarse extension-twinned *** extension twins, double twins and kinks show a decisive effect on the formation of rolling *** number of {10–11}-{10–12} double twins and resultant the continuous drX process are strongly affected by the rolling slab temperature and the reduction thickness per pass. By optimizing the rolling conditions, texture and microstructures of the multi-pass rolled Mg-Al-Ca-Mn alloy sheets are successfully modified. Although the total alloy content is only 1.5 wt.%, these Mg-Al-Ca-Mn alloy sheets show much higher strength than the commercial Mg-3Al-1 Zn(wt.%)(AZ31B) sheet.

关键词： Mg-Al-Ca-Mn alloy Hot rolling dynamic recrystallization Texture control Mechanical properties

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Effect of Fatigue Crack Network in die-attach Joints on Thermal resistance

Effect of Fatigue Crack Network in Die-attach Joints on Ther...

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2022 International Exhibition and Conference for Power Electronics, Intelligent Motion, renewable Energy and Energy Management, PCIM Asia 2022

作者： Ochi, Koki Yokoyama, Yoshinori Hanada, ryuichiro Izuo, Shinichi Nishikawa, Kazuyasu Kanai, Hiroki Abe, Yoshiki Kariya, Yoshiharu Power Device Works Mitsubishi Electric Corporation Japan Advanced Technology R&D Center Mitsubishi Electric Corporation Japan Graduate School of Shibaura Institute of Technology Japan Department of Materials Science and Engineering Shibaura Institute of Technology Japan

ISBN: (纸本)9783800759125

We evaluated the effect of fatigue crack networks in die-attach joints on the thermal resistance rtℎ and found singular rise of rtℎ in the final phase of fatigue crack networks formation. Structure of samples was Si/Solder/Si joints, and Sn-based lead-free solder alloys were used for the die-attach materials. We conducted thermal cycling tests and measured rtℎ, vertical crack density and thickness of die-attach joints before/after the tests. Then, we calculated rise of rtℎ due to vertical cracks and found that increase of measured rtℎ became twice larger than calculated one in the final phase of fatigue crack networks formation. Horizontal cracks were observed in cross-sections of a severely damaged sample in addition to vertical cracks, and this caused remarkable rise of rtℎ © VdE VErLAG GMBH · Berlin · Offenbach.

关键词： Cracks

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Hydrate reformation Characteristics in Offshore Natural Gas Hydrate reservoir Using the Horizontal Well depressurization Production

Hydrate Reformation Characteristics in Offshore Natural Gas ...

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Offshore technology Conference, OTC 2025

作者： Zhang, Jianbo Liu, Xiaoao Luo, Jiazheng Sun, Xiaohui Zhong, Jie Wang, Zhiyuan Huang, Weian Sun, Baojiang Wang, Xiao School of Petroleum Engineering China University of Petroleum East China Shandong Qingdao China Shandong Key Laboratory of Offshore Oil & Gas and Hydrates Development Shandong Qingdao China CNPC Engineering Technology R&D Company Limited Beijing China No.7 Oil Production Plant PetroChina Changqing Oilfield Company Shanxi Xian China College of Computer Science and Technology China University of Petroleum East China Qingdao China School of Materials Science and Engineering China University of Petroleum East China Qingdao China

ISBN: (纸本)9781959025610

during depressurization production of natural gas hydrate, the reformation of hydrate is likely to occur in the reservoir, hindering the efficient development of hydrate. Previous studies on the reformation of hydrate in the process of natural gas hydrate production were mainly focused on experimental research and numerical simulation under experimental conditions. In this work, a multi-field coupling flow model considering the effect of hydrate reformation during depressurization production of hydrate reservoir was established, and the accuracy of the model was verified by the field measured data. Meanwhile, the reformation characteristics of hydrate in the reservoir using the horizontal well depressurization production were simulated and investigated. The results show that the reformation of hydrate in the reservoir mainly occurs in the upper part and middle boundary of the hydrate decomposition zone during the depressurization production. Moreover, the smaller the pressure drop extent, absolute permeability and initial hydrate saturation, and the deeper the horizontal well, the larger the hydrate secondary formation zone in the reservoir, the faster the rate of hydrate reformation, and the greater the hydrate saturation caused by hydrate reformation would be, which would make the risk of flow blockage by reformed hydrate in the reservoir rise. The results of this study can provide theoretical support for the safe and efficient development of offshore natural gas hydrate. © 2025, Offshore technology Conference.

关键词： Offshore gas well production

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Nitrogen and fluorine co-doped TiO_(2)/carbon microspheres for advanced anodes in sodium-ion batteries: High volumetric capacity, superior power density and large areal capacity

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Journal of Energy Chemistry 2022年第5期31卷 104-112页

作者： dan Lv dongdong Wang Nana Wang Hongxia Liu Shaojie Zhang Yansong Zhu Kepeng Song Jian Yang Yitai Qian Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan 250100ShandongChina Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusNorth WollongongNew South Wales 2500Australia Key Laboratory for Green Chemical Technology of Ministry of Education R&D Center for Petrochemical TechnologyTianjin UniversityTianjin 300072China Hefei National Laboratory for Physical Science at Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

Fast charging and high volumetric capacity are two of the critical demands for sodium-ion batteries(SIBs).Although nanostructured materials achieve outstanding rate performance,they suffer from low tap density and small volumetric ***,how to realize large volumetric capacity and high tap density simultaneously is very ***,N/F co-doped TiO_(2)/carbon microspheres(NF- TiO_(2)/C)are synthesized to achieve both of *** calculations reveal that N and F co-doping increases the contents of oxygen vacancies and narrows the bandgaps of TiO_(2) and C,improving the electronic conductivity of NF- TiO_(2)/***,NF- TiO_(2)/C exhibits the high binding energy and low diffusion energy barrier of Na+,significantly facilitating Na+storage and Na+***,NF- TiO_(2)/C offers a high tap density(1.51 g cm^(-3)),an outstanding rate performance(125.9 mAh g^(-1) at 100 C),a large volumetric capacity(190 mAh cm^(-3) at 100 C),a high areal capacity(4.8 mAh cm^(-2))and an ultra-long cycling performance(80.2%after 10,000 cycles at 10 C)*** addition,NF- TiO_(2)/C||Na_(3)V_(2)(PO_(4))_(3) full cells achieve an ultrahigh power density of 25.2 kW kg^(-1).These results indicate the great promise of NF- TiO_(2)/C as a high-volumetric-capacity and high-power-density anode material of SIBs.

关键词： TiO_(2) Heteroatom doping Volumetric capacity Areal capacity Sodium ion batteries

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Identification of key atomic process of Metal-induced lateral crystallization from First-principles Calculations

Identification of key atomic process of Metal-induced latera...

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International Conference on Simulation of Semiconductor Processes and devices (SISPAd)

作者： Yutaro Ogawa Hikari Suzuki Masayasu Miyata Advanced Memory Development Center Memory Division Kioxia Corporation Yokohama Japan Core Technology Research Center Frontier Technology R&D Institute Kioxia Corporation Yokohama Japan

ISBN: (数字)9798331516352

ISBN: (纸本)9798331516369

In order to improve the efficiency of metal-induced lateral crystallization (MILC) using Ni, it is important to understand the fundamental mechanisms. In this study, the NiSi 2 /amorphous Si (a-Si) interface is appropriately modeled and the atom transfer behavior during the MILC process was explored by first-principles calculations. It is found that the overall picture of MILC mechanism can be effectively comprehended through three fundamental processes: (1) the formation of Ni vacancies at the a-Si interface, (2) the diffusion of Ni vacancies within the bulk NiSi2, and (3) the reconstruction of the c-Si interface. The trends under stress, observed in experiments, are explained by applying this mechanism to the MILC process.

关键词： Surface reconstruction Crystallization Market research Nickel Silicon Semiconductor process modeling Epitaxial growth Stress Surface treatment

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