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Experimental Evaluation of Electrochemically Mediated Amine Regeneration Integrated with Amine Thermal Swing for Co2 Capture at Optimized Desorption Temperatures

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SSRN 2024年

作者： Hasanzadeh, Amirhossein Chitsaz, Ata Khalilian, Morteza Rosen, Marc A. Mehr, Ali Saberi Department of Mechanical Engineering Faculty of Engineering Urmia University Urmia Iran Faculty of Engineering and Applied Science University of Ontario Institute of Technology 2000 Simcoe Street North OshawaONL1G 0C5 Canada School of Mechanical & Materials Engineering University College Dublin Dublin Ireland

In the present study, the integration of electrochemically mediated amine regeneration (EMAR) with amine thermal swing process is investigated as a novel method for CO2 capture, utilizing experimental practical data. The aim is to increase the absorption-desorption temperature difference in order to improve the energy efficiency of the capture process and hamper the amine degradation issue at high desorption temperatures. A comprehensive experimental procedure is presented, and an experimental process setup is designed and constructed. As the main novelty of the study a special heating-cooling subsystem is incorporated with the base EMAR process in order to devise a combined electrochemical-thermal system. The performance of the system is evaluated at sequential incremental desorption temperatures while the absorption temperature is kept constant. Relevant data, including the desorbed CO2 flow, absorbed CO2 flow, stream points temperature, and cell voltage are collected. Based on the data collected, two performance parameters are calculated, including normalized carbon separation work, and CO2 desorption density. Based on these performance parameters the system's capability is assessed, and the optimal desorption temperature is ultimately selected. The presented electrochemical-thermal CO2 separation system, operating with a chloride salt system, demonstrates its best energetics performance at a desorption temperature of 44 °C, resulting in a normalized capture work of 95.2 kJ/molCO2. Under these optimal conditions, the cell's average voltage is measured to be 0.37 V, and the CO2 desorption density is determined to be 0.71 ***-1.m-2. © 2024, The Authors. All rights reserved.

关键词： Carbon

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Study of the flexible control of the robot welding and its application in the training teaching of the welding technology and engineering 2

Study of the flexible control of the robot welding and its a...

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2nd International Conference on Information science and Education, ICISE-IE 2021

作者： Fu, Li Lu, Lin Jia, Zheng Liu, Tongyu Ju, Hongtao College of Mechanical Engineering Shenyang University Liaoning Shenyang China College of Materials Science and Engineering Shenyang University of Technology Liaoning Shenyang China

ISBN: (纸本)9781665438292

High flexibility and high reliability robot welding technology represents the development direction of high-end manufacturing industry in the future. In this paper, the flexible control process of robot welding was studied, and a robot workstation that could realize flexible welding was established. Taking the specialty of welding technology and engineering as an example, the robot was integrated into the undergraduate training teaching, the control accuracy of the robot was analyzed, and the automatic welding of robot was investigated by using the method of tungsten argon arc welding, Effects of welding speed and welding current on mechanical properties of stainless steel welded joints. The results showed that the control accuracy could reach 0.1mm through this robot workstation and the welding effect was reliable, which significantly stimulates the students' enthusiasm for the practical training of welding technology and engineering. The effect results of welding speed and welding current on the mechanical properties of antibacterial stainless steel welded joints indicated that the welding speed affected the tensile strength greater. © 2021 IEEE

关键词： Tensile strength

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{112}<111>Twins or Twinned Variants Induced by Martensitic Transformation?

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Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 133-140页

作者： Zuohua Wang Haidong Sun Peng Wang Ning Liu Pinwen Zhu Dongli Yu Hongwang Zhang National Engineering Research Center for Equipment and Technology of Cold Strip Rolling College of Mechanical EngineeringYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Liren College of Yanshan University Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China

Twinned substructure in lath martensite was induced in the interstitial free(IF)steel via a high pressure thermal cycle(heating up to 1100℃and holding for 30 min,cooling at 10℃/s to room temperature under a pressure of 4 GPa).Experimental observations and theoretical simulation confrm that the twinned substructure has the origin related to the twinned variants rather than the bcc{112}<111>twins,while extra difraction spots were caused by crystal overlapping rather than any extra *** diferences in crystallography and electron difraction behavior between twinned variants and{112}<111>twins were discussed in detail.

关键词： Twinned variants {112}twins Martensitic transformation Crystal overlapping Electron difraction

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Ultra-Low Energy Consumption of Preparing Unidirectional Porous Si3n4 Ceramics Via Freeze Casting and Combustion Synthesis

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SSRN 2024年

作者： Wei, Zhilei Xie, Wenqi Hu, Jiabin Zhang, Zhejian Zhang, Biao Zhao, Lei Li, Yanjun Wang, Bo Shi, Zhongqi State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an710049 China School of Materials Science and Engineering Xi'an University of Architecture and Technology Xi'An710055 China

Unidirectional porous (UP) Si3N4 ceramics are promisingly applied in high-temperature filtration devices. However, traditional techniques exhibit the drawbacks of high energy consumption and difficult to control the pore structures. Herein, a novel technique of freeze casting combined with combustion synthesis was proposed to prepare the UP Si3N4 ceramics using Si powder and Si3N4 diluent as raw materials. The effects of Si3N4 diluent content and solid loading on the phase composition, microstructure and permeable/mechanical/filtration properties were investigated systematacially. The results showed that the open porosity and structure wavelength of UP Si3N4 ceramics with uniform microstructures can be tailored in a wide range of 47.8 - 84.1% and 21.7 - 45.6 μm, respectively. The products exhibited anisotropic compressive strength, good permeable and filtration properties. This novel route with the advantages of energy-saving and high efficiency offers new insights for fabricating UP ceramics, which can be applied in filtration devices. © 2024, The Authors. All rights reserved.

关键词： Silicon compounds

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Accelerating Degradable Composite Breakdown Using Citrus Processing Side Streams

ACS Sustainable Resource Management

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ACS Sustainable Resource Management 2024年第2期1卷 344-354页

作者： Aline V. Duarte Laís T. Possari Lívia M. G. Gonçalves Baltus C. Bonse Talita R. Rigolin Sílvia H. P. Bettini Graduate Program in Materials Science and Engineering Federal University of Sao Carlos Rod. Washington Luiz 235 São Carlos 13565-905 Brazil Department of Materials Engineering Centro Universitário FEI 09850-901 São Bernardo do Campo Brazil Department of Materials Engineering Federal University of Sao Carlos Rod. Washington Luiz 235 São Carlos 13565-905 Brazil

Daily, vast amounts of waste are produced in the orange juice industry, a large part of which is reused in low-added-value products. In this work, orange vesicle fiber residues from the juice sieving stage were plasticized by extrusion, producing a thermoplastic citrus pulp (TCP). This pulp was incorporated into poly(butylene succinate) (PBS) at up to 50 wt %. The influence of TCP on the molar mass, morphology, tensile properties, rheological behavior, and biodeterioration of PBS in soil was evaluated. Highly flexible compounds with elongations similar to those of PBS were produced. Scanning electron microscopy analyses suggested good dispersion between the TCP and PBS phases, verified after acid extraction of pectin. Rheological analyses indicated the presence of strong interactions in the interconnected network formed by pectin gel, percolation of TCP lignocellulosic fibers, or both. Analyses of mass loss by burial in soil showed that the higher the TCP content in PBS is, the higher and faster the biodeterioration is. Size exclusion chromatography analyses indicated that the greater the concentration of TCP and the better dispersed it was in the compounds, the lower molar masses populations appeared in PBS, indicating higher rates of degradation of PBS in the presence of TCP. This innovative approach not only reuses the waste produced in the orange juice industry but also demonstrates the potential for obtaining environmentally friendly compounds.

关键词： Beverages Carbohydrates Fibers Polymers Soils

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Tailored High-Temperature Corrosion Behavior of Cr Coatings Using Hipims on Zirlo Alloys for Atf Application

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SSRN 2024年

作者： Han, Zhichao Wang, Zheng Wang, Zhenyu Tan, Shiyao Wang, Aiying Ke, Peiling College of Mechanical Engineering Zhejiang University of Technology Hangzhou310014 China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective Technologies Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

To further enhance the oxidation resistance of Zirconium alloys during Loss of Coolant Accident (LOCA), protective Cr coatings were deposited in synchronized pulse bias mode through high power impulse magnetron sputtering (HiPIMS). The results showed the weight gain of the Cr coatings with synchronized pulse bias was reduced by approximately 39% compared to that of the Cr coatings without synchronized pulse bias after 90 minutes of steam oxidation at 1200 °C. This was mainly attributed to the formed intense (200) preferred orientation of the Cr coatings with synchronized pulse bias during deposition, accelerating the recrystallization growth of the residual Cr layer in a high-temperature steam environment, thereby reducing the rapid diffusion pathways for oxygen. Moreover, the synchronized pulse bias induced Cr grains refinement, favoring the formation of a more compact Cr2O3 scale, and therefore efficiently inhibiting the diffusion of external oxygen to the underlying alloy. © 2024, The Authors. All rights reserved.

关键词： Oxidation resistance

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Atomic dynamics in MCrX2 (M=Ag,Cu;X=S,Se) across magnetic and superionic transitions

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Physical Review materials 2025年第3期9卷 035402-035402页

作者： Jingxuan Ding Md Towhidur Rahman Chengjie Mao Jennifer L. Niedziela Dipanshu Bansal Andrew F. May Douglas L. Abernathy Yang Ren Alexandra Zevalkink Department of Mechanical Engineering and Materials Science Duke University Durham North Carolina 27708 USA John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge Massachusetts 02138 USA Department of Mechanical Engineering Michigan State University Michigan Michigan 48910 USA Department of Chemistry Duke University Durham North Carolina 27708 USA Nuclear Nonproliferation Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Department of Mechanical Engineering Indian Institute of Technology Bombay Mumbai Maharashtra 400076 India Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Advanced Photon Source Argonne National Laboratory Lemont Illinois 60439 USA Department of Chemical Engineering and Materials Science Michigan State University Michigan Michigan 48910 USA

A systematic study of atomic dynamics and thermal properties of the family of layered chalcogenide compounds MCrX2 (M=Ag,Cu;X=S,Se) was performed, including neutron and x-ray scattering, thermal characterization, and first-principles simulations. In all compounds, we observe a breakdown of specific phonon modes across the superionic phase transition, for phonons whose eigenvectors exhibit large contributions of mobile ions. In particular, the nondispersive portions of transverse acoustic (TA) branches at short-wavelengths and the low-energy optical phonons with large contributions from Ag+ or Cu+ become severely damped in the superionic phase. However, well-defined quasiparticles persist in the superionic state for long-wavelength TA phonons. In the case of AgCrS2, the coupling of lattice dynamics with its antiferromagnetic transition was also investigated. The magnetic ordering couples with the monoclinic–rhombohedral structural transition, and the Cr3+ spin arrangement strongly affects the phonon dispersions. We qualitatively reproduce the magnetic and nuclear components of the INS measurement for antiferromagnetic AgCrS2 by combining models of spin-waves and spin-polarized first-principles phonon simulations. Quasielastic magnetic fluctuations persist in the paramagnetic phase up to high temperature, but are clearly distinguished from the nuclear component through their momentum dependence. Finally, we report measurements of the thermal properties of the selenide compounds and find good agreement with our DFT simulations.

关键词： X ray scattering

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Preparation and Photoelectric Properties of Patterned Ag Nanoparticles on FTO/Glass Substrate by Laser Etching and Driving Layer Strategy

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Acta Metallurgica Sinica(English Letters) 2021年第7期34卷 973-985页

作者： Li-Jing Huang Gao-Ming Zhang Yao Zhang Bao-Jia Li Nai-Fei Ren Lei Zhao Yi-Lun Wang School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Institute of Micro-Nano Optoelectronic and Terahertz Technology Jiangsu UniversityZhenjiang 212013China Jiangsu Provincial Key Laboratory of Center for Photon Manufacturing Science and Technology Jiangsu UniversityZhenjiang 212013China

An effective method based on laser etching and driving layer strategy was proposed to prepare patterned Ag nanoparticles(Ag NPs)on fluorine-doped tin oxide(FTO)/glass substrate and thus to enhance the photoelectric *** method successively included depositing an aluminum-doped zinc oxide(AZO)driving layer,laser etching,depositing an Ag layer,furnace annealing and laser *** AZO and Ag layer thicknesses were adopted,and the surface morphology,crystal structure and photoelectric properties were *** Ag NPs/FTO/glass sample without an AZO driving layer was prepared for *** was found that furnace annealing of the Ag layer combined with the AZO driving layer,rather than that without the AZO driving layer,was more conducive to generating patterned Ag *** a 20-nmthick AZO layer and a 150-nm-thick Ag layer led to the formation of uniformly distributed Ag NPs being aligned along the laser-etched grooves to form a *** as-obtained sample had the best comprehensive photoelectric property with an average transmittance of 79.95%,a sheet resistance of 7.11Ω/sq and the highest figure of merit of 1.50×10^(-2)Ω^(-1),confirming the feasibility of the proposed method and providing enlightenment for related researches of transparent conductive oxide-based films.

关键词： Ag nanoparticle Fluorine-doped tin oxide(FTO) Photoelectric property Laser etching Driving layer

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Quaternary Piezoelectric Ceramics with Ultra-High mechanical Quality Factor

SSRN

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SSRN 2024年

作者： Wang, Chao Ning, Li Zhao, Weijia Jia, Nanxiang Li, Fei Electronic Materials Research Laboratory Key Lab of Education Ministry State Key Laboratory for Mechanical Behavior of Materials School of Electronic Science and Engineering Xi’an Jiaotong University Xi’an China

a novel quaternary piezoelectric ceramics of (0.125-x) Pb0.98Sr0.02(Mg1/3Nb2/3)O3-0.445PbTiO3-0.43PbZrO3-xPb(Mn1/3Nb2/3)O3 (abbreviated as xPMnN-PSMN-PZT) were prepared by the solid-state sintering method. The hard dopant PMnN induced the morphotropic phase boundary (MPB) of PSMN-PZT into a tetragonal-rich region. In addition, the XPS and EPR analysis proved the existence of a large amount of oxygen vacancies ( ) in PMnN-PSMN-PZT ceramic system. The composition near tetragonal-rich MPB region and the appearance of defect dipoles formed a strong coupling effect on the domain wall motion and leaded to an ultra Qm value. The optimum piezoelectric properties were achieved at x = 9 mol% with d33= 260 pC/N, Qm = 3880, tanδ = 0.009 and Tc = 332 °C. A significant internal bias field (Ebias) of 8.83 kV/cm was also observed in 0.09PMnN-PSMN-PZT ceramics. © 2024, The Authors. All rights reserved.

关键词： Piezoelectric ceramics

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Two Birds with One Stone: Bimetallic Znco2s4 Polyhedral Nanoparticles Decorate Porous N-Doped Carbon Nanofiber Membranes for Free-Standing Flexible Anodes and Microwave Absorption

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SSRN 2024年

作者： Li, Xiaoqiang Guan, Guangguang Xiang, Jun Tong, Siyi Cheng, Bingjie Zhang, Kaiyin Zhao, Tingting School of Science Jiangsu University of Science and Technology Zhenjiang212100 China Institute of Materials Science and Engineering Beijing University of Technology Beijing100124 China Jiangsu University of Science and Technology China College of Mechanical and Electrical Engineering Wuyi University Wuyishan354300 China

Cost-efficient material with an ingenious design is important in the engineering applications of flexible energy storage and electromagnetic (EM) protection. In this study, bimetallic ZnCo2S4 polyhedral nanoparticles homogenously embedded in the surface of porous N-doped carbon nanofiber membranes (ZCS@PCNFM) have been fabricated by electrospinning technique combined with carbonization and hydrothermal processes. As a self-assembled electrode for lithium-ion batteries (LIBs), the bimetallic ZnCo2S4 nanoparticles possess rich redox reactions, good electrical conductivity, and pseudocapacitive properties, while the three-dimensional (3D) multiaperture architecture of the nanofiber film not only shortens the transfer spacing of lithium ions and electrons but also effectively tolerates the volume variation during lithiation and delithiation cycles. Benefiting from the above merits, the ZCS@PCNFM electrode exhibits good cycle performance (662.3 mA h g−1 at 100 mA g−1 after 100 cycles), superior rate capacity (401.3 mA h g−1 at 1 A g−1) and an extremely high initial first capacity of 1152.2 mAh g−1 at 100 mA g−1. Meanwhile, depending on the hierarchical nanostructure and multi-component heterogeneous interface effects constructed by 3D inlaid architecture, the ZCS@PCNFM nanocomposite exhibits fascinating microwave absorption (MA) characteristics with a superhigh reflection loss (RL) of –49.7 dB at a filling content of only 20 wt% and corresponding effective absorption bandwidth (EAB, RL © 2024, The Authors. All rights reserved.

关键词： Carbon nanofibers

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