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Mixed-conducting ceramic–carbonate membranes exhibiting high CO2/O2 permeation flux and stability at high temperatures

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Journal of Advanced Ceramics 2020年第1期9卷 94-106页

作者： R.ORTEGA-LUGO J.A.FAbIAN-ANGUIANO O.OVALLE-ENCINIA C.GOMEZ-YANEZ b.h.zeifert J.ORTIZ-LANDEROS Instituto Politécnico Nacional Escuela Superior de Ingeniería Química e Industrias ExtractivasDepartamento de Ingeniería en Metalurgia y MaterialesUPALM-ZacatencoMexico City 07738Mexico Chemical Engineering School for Engineering of Matter Transport and EnergyArizona State UniversityTempeAZ 85287-6106USA

This investigation demonstrates the feasibility to fabricate high quality ceramic–carbonate membranes based on mixed-conducting ***,it is reported the simultaneous CO2/O2 permeation and stability properties of membranes constituted by a combination of ceramic and carbonate phases,wherein the microstructure of the ceramic part is composed,in turn,of a mixture of fluorite and perovskite *** ceramics showed ionic and electronic conduction,and at the operation temperature,the carbonate phase of the membranes is in liquid state,which allows the transport of CO32-and O2–species via different *** fabricate the membranes,the ceramic powders were uniaxially pressed in a disk ***,an incipient sintering treatment was carried out in such a way that a highly porous ceramic was ***,the piece is densified by the infiltration of molten *** of the membranes was accomplished by SEM,XRD,and gas permeation techniques among *** and chemical stability under an atmosphere rich in CO2 was ***2/O2 permeation and long-term stability measurements were conducted between 850 and 940℃.The best permeation–separation performance of membranes of about 1 mm thickness,showed a maximum permeance flux of about 4.46×10^–7 mol·m^–2·s^–1·Pa^–1 for CO2 and 2.18×10^–7 mol·m^–2·s^–1·Pa^–1 for O2 at 940℃.Membranes exhibited separation factor values of 150–991 and 49–511 for CO2/N2 and O2/N2 respectively in the studied temperature *** long-term stability test showed certain microstructural changes in the membranes,no significant detriment on the permeation properties was observed along 100 h of continuous operation.

关键词： CO2 separation O2 separation ceramic–carbonate membrane selectivity

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Non-relativistic scattering amplitude for a new multi-parameter exponential-type potential

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Chinese Physics b 2016年第8期25卷 21-25页

作者： Yazarloo b h Mehraban h hassanabadi h Physics Department Semnan University Physics Department Shahrood University of Technology

In this paper, we study the scattering properties of s-wave Schrdinger equation for the multi-parameter potential,which can be reduced into four special cases for different values of potential parameters, i.e., hulthn, Manning–Rosen,and Eckart potentials. We also obtain and investigate the scattering amplitudes of these special cases. Some numerical results are also obtained and reported.

关键词： scattering amplitude Schrodinger equation multi-parameter potential phase shifts cross section

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The Log-Concavity of Kazhdan-Lusztig Polynomials of Uniform Matroids

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Journal of Systems Science & Complexity 2023年第1期36卷 117-128页

作者： XIE Matthew h Y ZhANG Philip b College of Science Tianjin University of TechnologyTianjin 300384China College of Mathematical Science Tianjin Normal UniversityTianjin 300387China

Elias,et al.(2016)conjectured that the Kazhdan-Lusztig polynomial of any matroid is *** by a computer proof of Moll’s log-concavity conjecture given by Kauers and Paule,the authors use a computer algebra system to pr... 详细信息

关键词： holonomicFunctions Kazhdan-Lusztig polynomial log-concavity uniform matroid

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Earth return path impedances of underground cable for three-layer earth

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第8期10卷 1191-1198页

作者： b.hEMMATIAN b.VAhIDI S.h.hOSSEINIAN Department of Electrical Engineering Amirkabir University of Technology

One of the factors that affect the parameters of an underground cable is earth return path *** developed a formula for the case of one-layer(homogenous) *** in practice the earth is composed of several *** this study we develop a new formula for earth return path impedance in the case of a three-layer *** check the accuracy of the obtained results,a comparison has been made with the finite element method(FEM).A comparison between the results of the Pollaczek formula and results of the obtained formula for a three-layer earth has been made,showing that the use of the Pollaczek formula instead of the actual formula can cause serious errors.

关键词： Underground cables Earth return path impedance Earth stratification Finite element method (FEM)

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Stagnant lids and mantle overturns:Implications for Archaean tectonics, magmagenesis,crustal growth, mantle evolution, and the start of plate tectonics

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Geoscience Frontiers 2018年第1期9卷 19-49页

作者： Jean h.bédard Geological Survey of Canada GSC-Québec

The lower plate is the dominant agent in modern convergent margins characterized by active subduction,as negatively buoyant oceanic lithosphere sinks into the asthenosphere under its own *** is a strong plate-driving force because the slab-pull force is transmitted through the stiff sub-oceanic lithospheric *** geological and geochemical data seem inconsistent with the existence of modernstyle ridges and arcs in the Archaean,a periodically-destabilized stagnant-lid crust system is proposed ***-lid intervals may correspond to periods of layered mantle convection where efficient cooling was restricted to the upper mantle,perturbing Earth's heat generation/loss balance,eventually triggering mantle *** basalts were derived from fertile mantle in overturn upwelling zones(OUZOs),which were larger and longer-lived than post-Archaean *** cratons/continents probably formed above OUZOs as large volumes of basalt and komatiite were delivered for protracted periods,allowing basal crustal cannibalism,garnetiferous crustal restite delamination,and coupled development of continental crust and sub-continental lithospheric *** mixing and rehomogenization during overturns retarded development of isotopically depleted MORb(mid-ocean ridge basalt)*** after the start of true subduction did sequestration of subducted slabs at the coremantle boundary lead to the development of the depleted MORb mantle *** Archaean mantle overturns,pre-existing continents located above OUZOs would be strongly reworked;whereas OUZOdistal continents would drift in response to mantle *** leading edge of drifting Archaean continents would be convergent margins characterized by terrane accretion,imbrication,subcretion and anatexis of unsubductable oceanic *** Earth cooled and the background oceanic lithosphere became denser and stiffer,there would be an increasing probability that oceanic crustal segments could

关键词： Archaean Mantle-overturn Stagnant-lid Continental crust Oceanic crust Subcretion

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SYNThESIS, ChARACTERIZATION AND SPECTROSCOPIC INVESTIGATION OF PYRAZINOPORPhYRAZINE NETWORK POLYMER-SUPPORTED METAL (Ⅱ)-bASED CATALYSTS

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Chinese Journal of Polymer Science 2013年第2期31卷 242-250页

作者： h.h. Abdel-Razik b.h. Asghar E. Kenawy Chemistry Department Faculty of Science Mansoura University Chemistry Department Faculty of Science Taif University Chemistry Department Faculty of Applied Sciences Umm Al-Qura University Chemistry Department Polymer Research Group Faculty of Science Tanta University

Chloranil through condensation reaction with vicinal diamine such as diaminomaleonitrile produced heterocyclic monomer, p-benzoquinonebis[2,3-b; 2＇,3＇-b＇]pyrazine-5,6-dinitrile. The tetranitrile monomer was cyclo-tetramerised using lithium/pentanol and acetic acid affording the corresponding tetrap-benzoquinone bis[2,3-b; 2＇,3＇-b＇]pyrazinoporphyrazine）]- based network polymer （2h-Pz）. The tetranitril monomer was cyclo-tetramerised using metal salt and quinoline affording the corresponding porphyrazinato-metal II-based network polymers （M-Pz）, M = Co, Ni or Cu. Elemental analytical results, IR and NMR spectral data of the prepared molecules are consistent with their assigned formulations. Molecular masses and metal contents of the synthesized polymers proved to be of high molecular masses which confirm the efficiency of tetramerization polymerization and complexation reactions. The prepared pyrazinoporphyrazines were used as efficient catalysts for the oxidation of thiophenol and benzylthiol to their disulfides in the presence of air atmosphere. The results of oxidation of thiophenol and benzylthiol show that after 15 min the maximum yield of the corresponding disulfides reached 95%, 91%, respectively.

关键词： Pyrazinoporphyrazine Polymer-supported metal (II)-based catalysts Chloranil.

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hydroclimatological data and analyses from a headwaters region of Mongolia as boundary objects in interdisciplinary climate change research

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Frontiers of Earth Science 2017年第3期11卷 457-468页

作者： N.b.h. VENAbLE ESS-Watershed Science Colorado State University Fort Collins CO 80523-1476 USA

Collaborative work on increasingly complex hydroclimatic investigations often crosses disciplinary boundaries. Elements of scientific inquiry, such as data or the results of analyses can become objectified, or capable of being adopted and/or adapted by users from multiple disciplinary realms. These objects often provide a bridge for collaborative endeavors, or are used as tools by individuals pursuing multi-disciplinary work. boundary object terminology was first formalized and applied by social scientists. however, few examples of the application of this useful framework are found in the hydrologic literature. The construct is applied here to identify and discuss how common researcb products and processes are used both internally and externally through providing examples from a project examining the historical and paleo proxy-based hydroclimatology of a headwaters region of Mongolia. The boundary object concept is valuable to consider when conducting and critiquing basic research, collaborating across multiple disciplinary teams as when studying climate change issues, as an individual researcher working in a cross boundary sense using methods from differing disciplines to answer questions, and/or when one group adapts the work of another to their own research problems or interpretive needs, as occurred with selected products of this project.

关键词： Mongolia boundary objects climate change,hydroclimate

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bound state solutions of the Dirac equation with the Deng–Fan potential including a Coulomb tensor interaction

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Chinese Physics b 2014年第3期23卷 123-130页

作者： S.Ortakaya h.hassanabadi b.h.Yazarloo Institute of Natural and Applied Sciences Erciyes University Department of basic Sciences Shahrood Branch Islamic Azad University

Approximate analytical solutions of the Dirac equation in the case of pseudospin and spin symmetry limits are inves- tigated under the Deng-Fan potential by applying the asymptotic iteration method for the arbitrary quantum numbers n and ~~. Some of the numerical results are also represented in both pseudospin symmetry and spin symmetry limits.

关键词： Dirac equation Deng-Fan potential pseudospin and spin symmetries tensor interaction

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Relativistic bound and Scattering Amplitude of Spinless Particles in Modified Schioberg Plus Manning–Rosen Potentials

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Communications in Theoretical Physics 2017年第1期67卷 71-75页

作者： b.h.Yazarloo h.Mehraban Physics Department Semnan UniversityP.O.Box 35195-363SemnanIran

by using an approximation for the centrifugal term, we study relativistic bound and scattering states of spin-zero particles in the presence of equal scalar and vector modified Schioberg plus Manning–Rosen potentials for any quantum numbers n and l. Energy eigenvalues and the scattering amplitude are calculated. Some special cases of the problem are also investigated.

关键词： modified Schioberg plus Manning–Rosen potentials Klein–Gordon equation bound state scattering state scattering amplitude

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Exact solutions of the Spinless-Salpeter equation under Kink-Like potential

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Chinese Physics C 2013年第12期37卷 13-16页

作者： h.hassanabadi b.h.Yazarloo Department of basic Sciences Shahrood Branch Islamic Azad University

The exact solution of Spinless-Salpeter equation(SSE)in the presence of Kink-Like potential is *** using the basic concepts of the supersymmetric quantum mechanics(SUSYQM)formalism and the functional analysis method,we have obtained the bound state solutions in the closed form and the eigenfunctions of the system are reported in the term of hypergeometric *** have also reported some numerical results.

关键词： Spinless-Salpeter equation SUSYQM Method functional analysis method Kink-Like potential

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