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Effect of Ni particle size on the production of renewable methane from CO_(2) over Ni/CeO_(2) catalyst

Journal of Energy Chemistry 2021年第10期30卷 602-611,I0015页

作者： Lili Lin Clifford A.Gerlak Chang Liu Jordi Llorca Siyu Yao Ning Rui Feng Zhang Zongyuan Liu Sen Zhang Kaixi Deng Christopher B.Murray josé a.rodriguez Sanjaya D.Senanayake Chemistry Division Brookhaven National LaboratoryUptonNY 11973USA Institute of Industrial Catalysis State Key Laboratory of Green Chemistry Synthesis TechnologyCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014ZhejiangChina Department of Chemistry University of VirginiaCharlottesvilleVA 22904USA Institute of Energy Technologies Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and EngineeringUniversitat Politècnica de CatalunyaEEBEEduard Maristany 10-1408019 BarcelonaSpain Zhejiang University Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Chemistry Department State University of New YorkStony BrookNYUSA Departments of Chemistry and Materials Science&Engineering University of Pennsylvania231 South 34th Street394PhiladelphiaPA 19104USA

Production of’renewable Methane’has attracted renewed research interest as a fundamental probe reaction and process for CO_(2)utilization through potential use in Cl fuel production and even for future space exploration ***_(2)methanation is a structure sensitive reaction on Ni/CeO_(2)*** precisely elucidate the size effect of the Ni metal center on the CO_(2)methanation performance,we prepared2%Ni/CeO_(2)catalysts with pre-synthesized uniform Ni particles(2,4 and 8 nm)on a high surface area CeO_(2)*** electron microscopy(TEM)and ambient pressure X-ray photo spectroscopy(AP-XPS)characterization have confirmed that the catalyst structure and chemical state was uniform and stable under reaction *** 8 nm sized catalyst showed superior methanation selectivity over the 4 and 2 nm counterparts,and the methanation activity in term of TOF is 10 times and 70 times higher than for the 4 and 2 nm counterparts,*** DRIFTS studies revealed that the larger Ni(8 nm particles)over CeO_(2)efficiently facilitated the hydrogenation of the surface formate intermediates,which is proposed as the rate determining step accounting for the excellent CO_(2)methanation performance.

关键词： CO_(2)methanation Particle size effect Ni/CeO_(2) In situ DRIFTS Mechanism investigation

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Template-free fabrication of fractal porous Y2O3 monolithic foam and its functional modification by Ni-doping

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Science China Materials 2020年第9期63卷 1842-1847页

作者： Rui Chen Wenqian Xu Sanjaya D.Senanayake josé a.rodriguez Jingguang G.Chen Tiehong Chen School of Materials Science and Engineering Key Laboratory of Advanced Energy Materials Chemistry(MOE)Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Nankai UniversityTianjin 300350China X-ray Science Division Advanced Photon SourceArgonne National LaboratoryArgonne 60439USA Chemistry Division Brookhaven National LaboratoryUptonNew York 11973USA

Hierarchically porous materials have attracted growing interest due to their great potential in catalysis,separation,and biomedical systems[1–6].Tremendous efforts have been devoted to the rational design and synthesis of advanced porous materials with fascinating synergetic properties or multifunctions originating from their special porous structures[7–13].Generally,hierarchical porous structures can be created through hard or soft templates,or combination of soft and hard templates[14,15].However,disadvantages related to high cost or tedious synthetic steps have been impeding the scale-up of these synthesis routes for practical applications.

关键词：混合氧化物配位聚合微米孔纳米孔尺度范围纳米晶粒分形结构金属阳离子

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Characterization of Gromov Hyperbolic Short Graphs

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Acta Mathematica Sinica,English Series 2014年第2期30卷 197-212页

作者： josé Manuel rodriguez Departamento de Matemticas Universidad Carlos III de MadridAvenida de la Universidad 30

To decide when a graph is Gromov hyperbolic is,in general,a very hard *** this paper,we solve this problem for the set of short graphs（in an informal way,a graph G is r-short if the shortcuts in the cycles of G have length less than r）：an r-short graph G is hyperbolic if and only if S9r（G）is finite,where SR（G）：=sup{L（C）：C is an R-isometric cycle in G}and we say that a cycle C is R-isometric if dC（x,y）≤dG（x,y）＋R for every x,y∈C.

关键词： Short graph Gromov hyperbolicity Gromov hyperbolic graph infinite graphs geodesics

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Powder metallurgy with space holder for porous titanium implants:A review

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Journal of Materials Science & Technology 2021年第17期76卷 129-149页

作者： Alejandra.rodriguez-Contreras Miquel Punset joséA.Calero Francisco Javier Gil Elisa Ruperez joséMaría Manero Biomaterials Biomechanics and Tissue Engineering Group(BBT)Department of Materials Science and EngineeringUniversitat Politecnica de Catalunya(UPC)Av.Edurad Maristany 1608019BarcelonaSpain Barcelona Research Centre in Multiscale Science and Engineering Technical University of Catalonia(UPC)Av.Eduard Maristany 10-1408019BarcelonaSpain UPC Innovation and Technology Center(CIT-UPC).Technical University of Catalonia(UPC) C.Jordi Girona 3-108034Barcelona.Spain AMES GROUP SA.Carretera Nacional 340 Pol.Ind."Les Fallulles"08620Sant Vicenc dels HortsBarcelonaSpain Bioengineering Institute for Technology Universitat Intemacional de Catalunyac/Josep Trueta s/n08195BarcelonaSpain

One of the biggest challenges in the biocompatibility of implantable metals is the prevention of the stress shielding effect,which is related to the coupling of the bone-metal mechanical *** stress shielding phenomenon provokes bone resorption and the consequent adverse effects on prosthesis ***,it can be inhibited by adapting the stiffness of the implant *** the use of titanium(Ti)porous structures is a great alternative not only to inhibit this effect but also to improve the osteointegration of orthopedic and dental implants,a brief description of the techniques used for their manufacturing and a review of the current commercialized implants produced from porous Ti assemblies are compiled in this *** powder metallurgy(PM)with space holder(SH)is a powerful technology used to produce porous Ti structures,it is here discussed its potential for the fabrication of medical devices from the perspectives of both design and *** most important parameters of the technique such as the size and shape of the initial metallic particles,the SH and binder type of materials,the compaction pressure of the green form,and in the sintering stage,the temperature,atmosphere,and time are reviewed according to the bibliography ***,the importance of the porosity and its types together with the influence of the mentioned parameters in the final porosity and,consequently,in the ultimate mechanical properties of the structure are ***,a few examples of the PM-SH application for the manufacturing of orthopedic implants are presented.

关键词： Powder metallurgy Space holder method Porous titanium structures Medical devices Stress shielding effect Porous materials permeability Interconnected porosity Porous bone substitute materials Open-cell titanium foams Sintering-dissolution technique

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Yetter–Drinfeld Modules over Weak Braided Hopf Monoids and Center Categories

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Acta Mathematica Sinica,English Series 2014年第4期30卷 567-590页

作者： jos Nicanor ALONSO LVAREZ Ramón GONZLEZ rodriguez Carlos SONEIRA CALVO Departamento de Matemticas Universidad de VigoCampus Universitario Lagoas-Marcosende Departamento de Matema'tica Aplicada II Universidad de VigoCampus Universitario Lagoas-Marcosende Departamento de Pedagoxía e Didctica Universidade da CoruaCampus Universitario de Elvia

In this paper, we introduce several centralizer constructions in a monoidal context and establish a monoidal equivalence with the category of Yetter-Drinfeld modules over a weak braided Hopf monoid. We apply the gener... 详细信息

关键词： Weak (braided) Hopf monoid Yetter-Drinfeld module center

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Biorefinery of Rice Husk to Obtain Functionalized Bioactive Compounds

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Journal of Renewable Materials 2019年第4期7卷 313-324页

作者： M.Lopretti N.Lecot a.rodriguez G.Lluberas F.Orozco L.Bolaños G.Montes De Oca H.Cerecetto J.Vega-Baudrit Laboratorio de Técnicas Nucleares Aplicadas a Bioquímica y Biotecnología Centro de Investigaciones Nucleares-Facultad de CienciasMataojo 2055Montevideo CP 11400Uruguay Área de Radiofarmacia Centro de Investigaciones Nucleares-Facultad de CienciasMataojo 2055Montevideo CP 11400Uruguay Química Bioanalítica Instituto Polo Tecnológico de Pando-Facultad de QuímicaUdelaRBy Pass de Pando y Ruta 8Pando-Canelones CP 91000Uruguay Laboratorio de Nacional de Nanotecnología-CeNAT-CONARE Costa Rica 1174-1200San JoséCP 10109Costa Rica Laboratorio de Polímeros POLIUNA-Escuela de Química Universidad NacionalHerediaSan JoséCP 86-3000Costa Rica

The biomass industrialization valorisation of grains and cereals is considered an opportunity for the countries where agro-industrial activity is one of its main economic activities,rendering new higher-value products with a concomitant solution to waste accumulation *** that end,in this work we describe and characterise bioactive compounds generation from rice husk by semisolid fermentation,obtained from 500 g of the material at room temperature and 60%humidity with mixed cultures of Phanerochaete chrysosporium and Gloeophyllum *** extract was evaluated in different situations:murine mammary tumour cells(4T1),normal cells(NIH 3T3)and in Lactobacillus acidophilus,and Trichoderma *** results exhibited that the extract inhibited 4T1 cells at concentrations higher than 20μg/mL,but did not inhibit normal cells,and displayed germicide activity after 3 days *** propose that these functionalized compounds have a potential application in industry/agriculture/medicine obtained from rice husk waste.

关键词： Biorefinery rice husk bioactive compounds valorisation of biomass veratryl alcohol

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Modelling extraordinary floods and sedimentological processes in a large channel-floodplain system of the Lower Paran River(Argentina)

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International Journal of Sediment Research 2015年第2期30卷 150-159页

作者： Marina L.Garcia Pedro A.Basile Gerardo A.Riccardi josé F.rodriguez Hydraulics Department School of Civil EngineeringFaculty of Exact SciencesEngineering and Land SurveyingNational University of Rosario Centre for Hydro-Environmental Research Faculty of Exact SciencesEngineering and Land SurveyingNational University of Rosario Research Council of National University of Rosario(CIUNR) Civil Surveying and Environmental EngineeringUniversity of Newcastle

A quasi-2D unsteady flow and sediment transport model suitable for the simulation of large lowland river systems,including their floodplains,is *** water flow and sediment equations are discretised using an interconnected irregular cells scheme,in which different simplifications of the 1D de Saint Venant equations are used to define the discharge laws between ***-distributed transport and deposition of fine sediments throughout the river-floodplain system are *** model is applied over a 208-km reach of the Parana River between the cities of Diamante and Ramallo（Argentina） comprising a river-floodplain area of 8100 km;.After calibration and validation,the model is applied to predict water and sediment dynamics during synthetically generated extraordinary floods of100,1000,and 10,000 years return *** potential impact of a 56-km long road embankment constructed across the entire floodplain is simulated and compared to model results without the *** embankment results in increases in upstream water levels,inundation extent,flow duration,and sediment deposition.

关键词： Fluvial hydraulics Numerical modelling Floodplain sedimentation Lowland rivers Parana River

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Fractional Square Functions and Potential Spaces, Ⅱ

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Acta Mathematica Sinica,English Series 2015年第11期31卷 1759-1774页

作者： Jorge J.BETANCOR Juan C.FARIA Lourdes rodriguez-MESA Ricardo TESTONI jos L.TORREA Departamento de Anlisis Matemtico Universidad de La Laguna Campus de Anchieta Avda.Astrofísico Francisco Snchez 38271 La Laguna (Sta.Cruz de Tenerife) Spain Departamento de Matemtica Universidad Nacional del Sur Avda. Alem 1253 8000 Bahía BlancaBuenos Aires Argentina Departamento de Matem'aticas Universidad Autónoma de Madrid ICMAT-CSIC-UAM-UCM-UC3MCiudad Universitaria de Canto Blanco 28049 Madrid Spain

In this paper, we study fractional square functions associated with the Poisson semigroup for SchrSdinger operators. We characterize the potential spaces in the SchrSdinger setting by using vertical, area and gλ, fra... 详细信息

关键词： g-function Schrodinger operator potential space

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Contributions to data transmission at critical moments on unmanned aerial vehicles

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Chinese Journal of Aeronautics 2023年第8期36卷 247-257页

作者： jose Enrique rodriguez David SEGURADO Manuel SANCHEZ jose Javier MARTINEZ Rafael GONZALEZ National Institute of Aerospace Technology Madrid 28850Spain Department of Computer Science University of AlcalaAlcala de HenaresMadrid 28054Spain

As for unmanned aircraft, the knowledge of the aircraft performance is directly related with the navigation, guidance, and control system programming. Therefore, the measured data in each phase of the flight must be sufficiently precise to obtain a good characterization of *** article proposes new methods of sending information to ground, which make it possible to know the aircraft behavior accurately, and for this purpose, four contributions have been made for ALO(Avión Ligero de Observación, Spanish acronym for Light Observation Aircraft). Currently, the characterization is based on data obtained at ten samples per second, insufficient to acquire detailed knowledge of what happened during the whole flight of an aircraft. As a result of these contributions, many more samples per second of accelerations and angular velocities are obtained at the most critical moments of the flight, such as takeoff or landing. Among the improvements included are data compression techniques, providing references to locate the measured data in time and identifying labels of each parameter.

关键词： Critical moments Data transmission Datacompression tech-niques Radio-modem Recommended Standard 232(RS-232) Unmannedaerial vehicle

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Wheat genotypic variability in grain yield and carbon isotope discrimination under Mediterranean conditions assessed by spectral reflectance

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Journal of Integrative Plant Biology 2014年第5期56卷 470-479页

作者： Gustavo A. Lobos Iván Matus Alejandra.rodriguez Sebastián Romero-Bravo josé Luis Araus Alejandro del Pozo Plant Breeding and Phenomic Center Faculty of Agricultural Sciences University of Talca CRI-Quilamapu Agricultural Research Institute Plant Physiology Department Faculty of Biology University of Barcelona

A collection of 368 advanced lines and cultivars of spring wheat（Triticum aestivum L.） from Chile, Uruguay, and CIMMYT（Centro Internacional de Mejoramiento de Maíz y Trigo）, with good agronomic characteristics were evaluated under the Mediterranean conditions of central Chile. Three different water regimes were assayed： severe water stress（SWS, rain fed）, mild water stress（MWS; one irrigation around booting）, and full irrigation（FI; four irrigations： at tillering,flag leaf appearance, heading, and middle grain filling）. Traits evaluated were grain yield（GY）, agronomical yield components,days from sowing to heading, carbon isotope discrimination（△^13C） in kernels, and canopy spectral reflectance. Correlation analyses were performed for 70 spectral reflectance indices（SRI） and the other traits evaluated in the three trials. GY and △^13C were the traits best correlated with SRI, particularly when these indices were measured during grain filling. However,only GY could be predicted using a single regression, with ResearchNormalized Difference Moisture Index（NDMI2： 2,200; 1,100）having the best fit to the data for the three trials. For △^13C, only individual regressions could be forecast under FI（r^2： 0.25–0.37）and MWS（r^2： 0.45–0.59） but not under SWS（r^2： 0.03–0.09）.NIR‐based SRI proved to be better predictors than those that combine visible and NIR wavelengths.

关键词： Breeding drought dry matter index normalized difference moisture index vegetative index water index

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