Browsing by Subject "Coure"
Now showing items 1-20 of 34
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Ab initio cluster model study of geometry and bonding character of atomic nitrogen chemisorbed on the Cu(100) and Ag(100) surfaces
(1997-03-10)
Article
Restricted access - publisher's policyThe chemisorption of atomic nitrogen on the four-fold site Cu(100) and Ag(100) surfaces has been modeled by Cu5N, AgsN and Cu41N cluster models. For these clusters, ab initio Hartree Fock electronic wave functions have ... -
An ultra-fast annealing treatment by electropulsing during pure copper wire drawing
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-11-23)
Article
Open AccessThe influence of electropulses in situ on the drawing process of copper wires was investigated with the aim of avoiding time consuming annealing thermal treatments. It was found that with the application of electropulses, ... -
Capas de CulnSe2 para células solares: análisis por espectroscopia Raman de capas pobres en Cu
(Universitat Politècnica de Catalunya, 2009-06)
Master thesis (pre-Bologna period)
Open AccessEn este trabajo se presenta un estudio mediante espectroscopía Raman de capas CuInSe2 sintetizadas en condiciones de defecto de Cu, en función de su composición. El interés del estudio viene motivado por el potencial de ... -
Catalytic performance of zinc-supported copper and nickel catalysts in the glycerol hydrogenolysis
(2020-03-01)
Article
Open AccessGas-phase catalytic conversion of glycerol to value added chemicals was investigated over zinc-supported copper and nickel catalysts. The addition of aluminum in the support was also investigated in glycerol conversion and ... -
Disseny, automatització i supervisió d'un sistema de control de l'emulsió per al trefilat de coure
(Universitat Politècnica de Catalunya, 2015-02-02)
Master thesis (pre-Bologna period)
Restricted access - confidentiality agreement
Covenantee: Prysmian Cables & Systems -
Elemental copper recovery from e-wastes mediated with a two-step bioleaching process
(Springer, 2020-03-27)
Article
Open AccessCopper recovery from printed circuit boards (PCB) from waste mobile phones was investigated using a two-step bioleaching process. The method consists of a first step where Fe(II) ions are biologically oxidised to Fe(III) ... -
Estudi comparatiu de l'extracció de metalls d'un mineral a partir del mètode convencional i de biolixiviació
(Universitat Politècnica de Catalunya, 2015-06-09)
Bachelor thesis
Open AccessEl present projecte tracta sobre l’extracció del coure de la calcopirita. La recuperació de coure s’ha realitzat mitjançant l’aplicació dels següents mètodes: un mètode convencional hidrometal·lúrgic i biolixiviació ... -
Estudi i disseny d'un utillatge per la fabricació de conductors laminats de coure
(Universitat Politècnica de Catalunya, 2017-01)
Master thesis
Restricted access - author's decisionEn aquest projecte es pretén crear un utillatge per poder agilitzar i optimitzar la fabricació de conductors laminats. Aquests conductors elèctrics estan formats per tres peces de coure (làmines, xapes i reblons) que han ... -
Estudio del efecto de los escalones superficiales en la nanoindentación del cobre
(Universitat Politècnica de Catalunya, 2017-05)
Master thesis
Open AccessEn esta memoria se pretende recoger los resultados obtenidos en las simulaciones numéricas de nanoindentación realizadas durante el proyecto de final del Máster de Ciencia e Ingeniería de materiales, realizado en la UPC. ... -
How relevant are molecular electronic parameters for predicting corrosion inhibition efficiency: imidazoles as corrosion inhibitors of Cu/Zr materials in NaCl solution
(2021-12-01)
Article
Restricted access - publisher's policyCorrelations between corrosion inhibition efficiencies and DFT calculated molecular parameters are critically evaluated for nine imidazole-based compounds on eight Cu/Zr materials in 3 wt% NaCl solution. To this end, 31 ... -
Hydrogenolysis of glycidol as an alternative route to obtain 1,3-propanediol selectively using MOx-modified nickel-copper catalysts supported on acid mesoporous saponite
(2017-10-10)
Article
Open AccessNi and Cu mono- and bimetallic catalysts modified with various types of acid oxides MOx (M=Mo, V, W, and Re) were tested for the hydrogenolysis of glycidol as an alternative route to the hydrogenolysis of glycerol to obtain ... -
Impacto de la logística inversa en el mercado del cobre en España
(Universitat Politècnica de Catalunya, 2010-06)
Master thesis
Open AccessEl cobre es un recurso natural que en España se concentra mayoritariamente en la Faja Pirítica Ibérica y éste es escaso en el resto de Europa. Además la producción minera representa sólo el 2,2 % de la cantidad consumida ... -
Implantación de la red FTTH como alternativa a la red de cobre
(Universitat Politècnica de Catalunya, 2012-02)
Master thesis (pre-Bologna period)
Open AccessEste proyecto surge ante la necesidad de transformar la red de acceso con el objeto de obtener un incremento de la capacidad de transporte de información por la red. Al no ser posible realizar esta ampliación utilizando ... -
Influence of copper on nickel-based catalysts in the conversion of glycerol
(2015-05-01)
Article
Open AccessThe catalytic transformation of glycerol to value-added compounds was investigated over bimetallic Ni-Cu/gamma-Al2O3 catalysts with Ni/Cu atomic ratios of 8/1, 4/1, 2/1, 1/1, 1/2, 1/4, and 1/8. XPS analysis revealed that ... -
Influence of ore grade and mineral medium on chalcopyrite bioleaching with mixed microbial consortia
(2021-01-04)
Article
Open AccessIn the present work, key parameters in copper bioleaching from chalcopyrite have been investigated at long-term operation. In detail, the type of mixed microbial consortium (origin and adaptation); the composition of two ... -
Intermatrix synthesis of polymer-copper nanocomposites with tunable parameters by using copper comproportionation reaction
(2010-06-12)
Article
Restricted access - publisher's policyThis paper describes the synthesis of copper nanoparticles (NPs) inside sulfonated polyetherether ketone (SPEEK) membranes, which serve both as reaction media for intermatrix synthesis (IMS) of Cu-NPs and as stabilizing ... -
Intermatrix synthesis of polymer-stabilized PGM@Cu core–shell nanoparticles with enhanced electrocatalytic properties
(2011-05-27)
Article
Restricted access - publisher's policyThis paper is dedicated to the further development of the Intermatrix synthesis (IMS) technique, which permits to produce a wide variety of polymer–metal nanocomposites (PMNCs) containing monometallic or bimetallic ... -
Los depósitos estratoligados de cobre en el noreste de México: características genéticas a partir del análisis de los fluidos mineralizantes
(2013)
Conference report
Open AccessEn el área de Huizachal Tamaulipas, el análisis de cuarzo mostro salinidades en el rengo de 18 a 28 % Eq. peso CaCl2 y temperaturas de homogeneización (Th) de 160º a 215 °. Para el cobre estratiforme del área de Cuatro ... -
Magnetic properties and magnetostructural transformations in Cu and Pd doped ferromagnetic Ni-Mn-Sn shape memory alloys
(2018)
Conference lecture
Open Access -
Microstructure influencing physical and mechanical properties of electrolytic tough pitch copper produced by equal channel angular pressing
(2013-11)
Article
Restricted access - publisher's policySamples of electrolytic tough pitch (ETP) copper were subjected to equal-channel angular pressing (ECAP) for up to 16 passes at room temperature following route Bc. The microstructural evolution was followed by Oriented ...
