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Towards the insights into the deactivation behavior of acetylene hydrogenation catalyst

Petroleum Science 2024年第2期21卷 1405-1414页

作者： Hai-Xia Su Yang Jiao Jian-Gong Shi Zhi-Wei Yuan Di Zhang Xu-Peng Wang Jing Ren Dan Liu Jian-Zhou Gui Hai-Yang Gao Xiao-Li Xu State Key Laboratory of Separation Membranes&Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process EngineeringSchool of Material Science and EngineeringTiangong UniversityTianjin300387China Institute of Engineering Technology Sinopec Catalyst Co.LtdBeijing101100China State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process EngineeringSchool of ChemistryTiangong UniversityTianjin300387China

A series of model catalysts were obtained by treating commercial fresh and spent catalysts unloaded from the factory with different methods, including green oil dipping, extraction and high-temperature regeneration;finally, the deactivation behavior of the commercial catalyst for acetylene hydrogenation were studied. The influence of various possible deactivation factors on the catalytic performance was elucidated via detailed structural characterization, surface composition analysis, and activity *** results showed that green oil, carbon deposit and sintering of active metal were the main reasons for deactivation, among which green oil and carbon deposit led to rapid deactivation, while the activity could be recovered after regeneration by high-temperature calcination. The sintering of active metal components was attributed to the high-temperature regeneration in hydrothermal conditions, which was slow but irreversible and accounted for permanent deactivation. Thus, optimizing the regeneration is expected to extend the service life of the commercial catalyst.

关键词： Acetylene Hydrogenation Green oil Carbon deposit Sintering Catalyst deactivation

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Analysis of the isolation performance of two operator’s seat suspension systems

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Noise and Vibration Worldwide 2024年第3期55卷 145-153页

作者： Zhai, Zhijin Gao, Guanghui Mei, Yundong College of Mechanical and Electrical Engineering Huanghe Jiaotong University Jiaozuo China Jiaozuo City Material Conveying Equipment Key Parts Manufacturing Process and Equipment Engineering Technology Research Center Jiaozuo China

From the good isolation results of Negative-Stiffness (NS) suspension and Three-Parallel (TP) suspension, the new isolation models designed by NSTP suspension (combination of NS and TP) and TPNS suspension (combination of TP and NS) to improve the operator’s shaking and riding quality have been investigated based on a 3-D dynamic model of car. Sensitivity of initial parameters in NSTP and TPNS suspension are analyzed and optimised via root mean square of the vertical acceleration (awzs), pitching acceleration (aws), and rolling acceleration (awθs) of operator’s seat. Research shows that (1) the vertical-riding quality in operator’s seat designed by NSTP and TPNS suspension is enhanced by 54.9% and 55.5% compared to the traditional suspension of operator’s seat;(2) the isolation efficiency in the vertical direction of both NSTP and TPNS suspension is similar. However, the aws and awθs with TPNS suspension are greatly deteriorated by 48.9% and 54.5% in comparison with NSTP suspension;(3) design parameters of NSTP suspension greatly affect the awzs, aws, and awθs;whereas design parameters of TPNS suspension insignificantly affect the awzs, aws, and awθs;and (4) the awzs, aws, and awθs with optimised TPNS suspension are smaller than designed TPNS suspension by 42.8%, 71.3%, and 78.1%, respectively. Therefore, optimised TPNS suspension should be applied to further ameliorate operator’s shaking and riding quality. © The Author(s) 2024.

关键词： Vehicle performance

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Development of Eggshell Waste Incorporated with a Porous Host as a Humidity Adsorption material

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Journal of Wuhan University of technology(materials Science) 2023年第5期38卷 974-983页

作者： BOONSOOK Kanokwan NAEMCHANTHARA Patcharin LIMSUWAN Pichet NAEMCHANTHARA Kittisakchai Department of Physics Faculty of ScienceKing Mongkut’s University of Technology Thonburi28 Bangkok 10140Thailand Department of Material and Process Engineering Technology 29 Faculty of Engineering and TechnologyKing Mongkut’s University of Technology North Bangkok30 Rayong CampusRayong 21120Thailand

The duck eggshell waste was developed to the novel desiccant that is friendly to human and *** calcium oxide(Ca O)and calcium chloride(CaCl_(2))as the calcium-based desiccants were prepared from eggshell *** Ca O desiccant derived from the eggshell waste sintering at 1300℃,while the CaCl_(2)desiccant was extracted from eggshell waste with the hydrochloric(HCl)solution at difierent concentrations from 5 to 30 wt%.The yield percentage of CaCl_(2)desiccant increased with increasing the HCl concentration to 25 wt%.The humidity adsorption behavior were investigated in the range of 75%-5%relative *** results show the CaCl_(2)desiccant has the highest hydration *** porous host from the kaolin was sintered at different temperatures from 200 to 1000℃and incorporated with 30%w/v concentrations of CaCl_(2).The physical properties and the humid-adsorption capacity of all porous host conditions were *** porous host at sintering temperature 800℃has the highest specific surface ***,the porous host at sintering temperature 800℃with the 30%w/v concentration of CaCl_(2)desiccant has the highest humid-adsorption capacity.

关键词： Eggshell waste Calcium chloride Desiccant Kaolin Porous materials

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Advanced materials for NH_(3)Capture:Interaction Sites and Transport Pathways

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Nano-Micro Letters 2024年第11期16卷 119-155页

作者： Hai‑Yan Jiang Zao‑Ming Wang Xue‑Qi Sun Shao‑Juan Zeng Yang‑Yang Guo Lu Bai Ming‑Shui Yao Xiang‑Ping Zhang Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190People’s Republic of China School of Future Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China China University of Petroleum Beijing 102249People’s Republic of China Institute for Integrated Cell‑Material Sciences(iCeMS) Kyoto UniversitySakyo‑KuYoshidaKyoto 606‑8501Japan

Ammonia(NH3)is a carbon-free,hydrogen-rich chemical related to global food safety,clean energy,and environmental *** an essential technology for meeting the requirements raised by such issues,NH3 capture has been intensively explored by researchers in both fundamental and applied *** four typical methods used are(1)solvent absorption by ionic liquids and their derivatives,(2)adsorption by porous solids,(3)abadsorption by porous liquids,and(4)membrane *** in the development of advanced materials for NH3 capture,we conducted a coherent review of the design of different materials,mainly in the past 5 years,their interactions with NH3 molecules and construction of transport pathways,as well as the structure–property relationship,with specific examples ***,the challenges in current research and future worthwhile directions for NH3 capture materials are proposed.

关键词： Ammonia capture Solvents Porous solids Porous liquids Membranes

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Interface engineering of Co nanoparticles decorated by Ir confined in N-doped carbon nanotubes for flexible Zn-air batteries and pH-universal overall water splitting

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Rare Metals 2024年第12期43卷 6447-6459页

作者： Ying-Gang Sun Xin Du Ji-Gang Wang Qiang Liu Jing-Lin Mu Zhong-Fang Li He-Qing Jiang Li-Kai Wang School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo255049China School of Chemistry Zhengzhou UniversityZhengzhou450001China Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao266100China School of Chemical and Biological Engineering and Institute of Chemical ProcessSeoul National UniversitySeoul08826Korea

To alleviate the crisis of energy shortages,the scalable fabrication of highly efficient electrocatalysts is highly sought after for metal-air batteries and pH-universal overall water ***,an in situ construction to achieve Co@Ir nanoparticles in N-doped carbon nanotubes has been explored,which were directly fabricated by the pyrolysis and galvanic *** interface engineering of Co@Ir core-shell structures could enhance interfacial and synergistic effects,achieving the tailorable electrocatalytic activities for oxygen reduction reaction,oxygen evolution reaction and hydrogen evolution ***@Ir-NT demonstrates the outstanding stability for overall water splitting under pH-universal ***@Ir-NT-based r-ZABs display a high power density of295.1 mW·cm^(-2)and a ultralong cycle stability over 2000continuous charge-discharge cycles,and Co@Ir-NT-based F-ZABs maintain the similar performance at different bending angles,suggesting its promising potential in the application of wearable *** corresponding theoretical calculations also indicate that Co@Ir core-shell structure could improve the adsorption capacity and facilitate the breakage of O-O ***,this work might be helpful for developing multifunctional catalysts for metalair batteries and water splitting under pH-universal conditions.

关键词： Co@Ir Carbon nanotubes Electrocatalysts Zn-air batteries Water splitting

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Classification and Age Estimation of Fossil Shells from Ban Sap Noi Geopark in Thailand,through the material Characterization Techniques

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Journal of Wuhan University of technology(materials Science) 2025年第3期40卷 635-643页

作者： Sirikorn Pongtornkulpanich Patcharin Naemchanthara Kridsada Faksawat Weeranut Kaewwiset Pichet Limsuwan Kittisakchai Naemchanthara Department of Physics Faculty of ScienceKing Mongkut’s University of Technology ThonburiBangkok 10140Thailand Department of Material and Process Engineering Technology Faculty of Engineering and TechnologyKing Mongkut’s University of Technology North BangkokRayong CampusRayong 21120Thailand Division of Tuberculosis Department of Disease ControlMinistry of Public HealthBangkok 10120Thailand Division of Physics Department of Physical and Material SciencesFaculty of Liberal Arts and ScienceKaset-sart University(Kamphaeng-Saen Campus)Nakhon Pathom 73140Thailand

The fossil shells on the sedimentary rocks were collected from The Historical Park,Ban Sap Noi Geopark,Phetchabun Province,***,the fossils remained in this area were investigated on the characteristic species only in geological studies with taxonomy for fossil age *** fill up the gap of these studies,the material characterization techniques were used to study the chemical composition and structure of fossil shells I,II and *** results clearly showed that the morphologies of all fossil shells were Brachiopod fossils with different *** functional group and elemental composition of all fossil shells showed that the high content of calcium carbonate was a major *** addition,the high content of quartz indicated the silica precipitation phenomenon in all fossil *** element composition of cross-sectional morphology and energy dispersive spectroscope (EDS mapping) were used to confirm the presence of Si element in each zone of fossil *** crystal structures of all fossil shells were investigated and indicated that the calcium carbonate compound was a calcite phase and silicon dioxide compound was a quartz ***,the crystal structure of quartz phase was used to calculate the crystallinity *** crystallinity index values in all fossil shells indicated a well-crystallized *** age of fossil shells was estimated and found to be brachiopod fossil in carboniferous period with the age of about 359.2 to 299.0 million years.

关键词： fossil shell Ban Sap Noi Geopark crystallinity index fossil age carboniferous period

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Influence of recycled carbon fiber addition on the microstructure and creep response of extruded AZ91 magnesium alloy

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Journal of Magnesium and Alloys 2023年第7期11卷 2518-2529页

作者： Sinan Kandemir Jan Bohlen Hajo Dieringa Department of Mechanical Engineering Izmir Institute of TechnologyGülbahçeUrlaIzmir 35430Türkiye Helmholtz-Zentrum Hereon Institute of Material and Process DesignMax-Planck-Straße 1Geesthacht 21502Germany

In this study,the recycled short carbon fiber(CF)-reinforced magnesium matrix composites were fabricated using a combination of stir casting and hot *** objective was to investigate the impact of CF content(2.5 and 5.0 wt.%)and fiber length(100 and 500μm)on the microstructure,mechanical properties,and creep behavior of AZ91 alloy *** microstructural analysis revealed that the CFs aligned in the extrusion direction resulted in grain and intermetallic refinement within the *** comparison to the unreinforced AZ91 alloy,the composites with 2.5 wt.%CF exhibited an increase in hardness by 16-20%and yield strength by 5-15%,depending on the fiber length,while experiencing a reduction in *** the reinforcement content was increased from 2.5 to 5.0 wt.%,strength values exhibited fluctuations and decline,accompanied by decreased *** divergent outcomes were discussed in relation to fiber length,clustering tendency due to higher reinforcement content,and the presence of interfacial products with micro-cracks at the CF-matrix *** creep tests indicated that CFs did not enhance the creep resistance of extruded AZ91 alloy,suggesting that grain boundary sliding is likely the dominant deformation mechanism during creep.

关键词： Metal matrix composites Magnesium alloys Recycled carbon fiber Extrusion,Microstructure Mechanical properties Creep

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Predicting glass quality in future technologies for glass production

Glass International

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Glass International 2024年第5期47卷 61-63页

作者： Hutter, Martin Hannes Hasche, Anna Shaker, Reham Yuan, Yuan Eckart, Sven Krause, Hartmut Fuhrmann, Sindy Richter, Andreas Institute for Energy Process Engineering and Chemical Engineering TU Bergakademie Freiberg Germany Institute for Heat Technology Thermodynamics TU Bergakademie Freiberg Germany Institute for Glass and Glass Technology TU Bergakademie Freiberg Centre for efficient high-temperature material conversion TU Bergakademie Freiberg Germany

Computational Fluid Dynamics (CFD) is a cost-effective and rapid research approach to develop new and optimise existing technologies, e.g. , based on detailed modelling of key physical and chemical phenomena. It is therefore a powerful tool accelerate the technological transformation towards a CO, net-zero glass production industry.

关键词： Computational fluid dynamics

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Self-healing of active site in Co(OH)_(2)/MXene electrocatalysts for hydrazine oxidation

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Journal of materials Science & technology 2024年第36期203卷 108-117页

作者： Kun Xiang Yongjing Wang Zechao Zhuang Jing Zou Neng Li Dingsheng Wang Tianyou Zhai Jizhou Jiang School of Environmental Ecology and Biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China Department of Chemistry Tsinghua UniversityBeijing 100084China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The development of efficient hydrazine oxidation reaction(HzOR)catalysts is important for the construc-tion of remarkable energy storage and conversion ***,after a period of electrochemical reaction,the active site of the catalyst will be irreversibly reduced or inactivated,and how to recover the active site is a major ***,we report 2D Co(OH)_(2)/Ti_(3)C_(2)(OH)_(x)MXene composites with rapid re-construction and self-healing behaviors as efficient and stable electrocatalysts during HzOR *** experimental and theoretical results indicate that the introduction of Ti_(3)C_(2)(OH)_(x)MXene can effectively reduce the dehydrogenation barrier of Co(OH)_(2),from 0.584 eV to 0.481 eV to form the real catalytic active center Co(OH)***,Co(OH)O/Ti_(3)C_(2)(OH)_(x)MXene composites with metal-like conductiv-ity not only present spontaneous adsorption capacity of N_(2)H_(4),but also can modulated rate-determining step of dehydrogenation of∗N_(2)H_(4)to∗N_(2)H_(3)(0.54 eV)compared with Co(OH)***,the electrophilic oxygen of Co(OH)O/Ti_(3)C_(2)(OH)_(x)can spontaneously obtain electrons and protons from N_(2)H_(4),achieving the oxidation of N_(2)H_(4)while reducing Co(OH)O to Co(OH)_(2),thus completing the self-healing of the efficient catalyst.

关键词： Hydrazine oxidation Self-healing Reconstruction Co(OH)_(2)/MXene Electrocatalysis

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Potential use of Ulva intestinalis-derived biochar adsorbing phosphate ions in the cultivation of winter wheat Tristicum aestivum

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Bioresources and Bioprocessing 2024年第1期11卷 371-394页

作者： Natalia Niedzbała Ewa Lorenc-Grabowska Piotr Rutkowski Jacek Chęcmanowski Anna Szymczycha-Madeja Maja Wełna Izabela Michalak Department of Advanced Material Technologies Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland Department of Process Engineering and Technology of Polymer and Carbon Materials Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland Department of Analytical Chemistry and Chemical Metallurgy Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland

In this work,the properties of biochar produced from green macroalga Ulva intestinalis by pyrolysis were studied at temperatures of 300,500,and 700°*** biochar was characterized in terms of multielemental composition,BET surface area,total pore volume,and biosorption properties toward phosphate *** produced at 700°C-25 m2/g had the highest surface *** kinetics and isotherms of sorption processes of phosphate ions as sorbate by these sorbents were *** biochar was able to remove 84.3%of phosphate ions from wastewater,whereas non-modified biochar-only 40.6%.Hence,biochar enriched with phosphate ions can serve as a valuable soil *** experiments performed on winter wheat(Triticum aestivum)with a 3%addition of dry Ulva intestinalis,pristine biochar,and Mg-modified biochar enriched with phosphate ions showed that these amendments stimulated plant growth(length and fresh weight of plants)as well as enlarging the chlorophyll content in *** results indicate that the production of biochar(pristine and Mg-impregnated)is a sustainable option to valorize the biomass of seaweeds,and to recycle phosphorus from wastewater.

关键词： Green seaweed Pyrolysis Biochar Phosphate ions Wastewater treatment Soil additives

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