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Listar por palabra clave "Copper"

Mostrando ítems 21-40 de 56

CuZnAl hydrotalcites as suitable precursors for chromium-free ester hydrogenolysis catalysts

Aubrecht, Jaroslav; Pospelova, Violetta; MARTINEZ FELIU, AGUSTIN; Concepción Heydorn, Patricia; Kikhtyanin, Oleg; Straka, Petr; Kubicka, David (Elsevier, 2022-08-25)

[EN] Ester hydrogenolysis is industrially performed over Adkins catalysts. Their use is being restricted as they contain environmentally unfriendly Cr2O3. As a potential replacement, five co-precipitated CuZnAl catalysts ...
Detoxificación por fotocatálisis solar de efl uentes cianurados provenientes de una industria metalúrgica

Silvestre Mira, María; Vercher Pérez, Rosa Francisca; Palacios Guillem, Santiago; Arques Sanz, Antonio; Amat Payá, Ana María; Añó Montalvá, Enrique José (Federación de Asociaciones de Ingenieros Industriales de España (FAIIE), 2012)

[En] Wastewaters from metal fi nishing industry contain, among other pollutants, high amounts of cyanide and heavy metals, which results in a high toxicity of the effl uent. Therefore, it is necessary to detoxify the ...
Dynamic Structure and Subsurface Oxygen Formation of a Working Copper Catalyst under Methanol Steam Reforming Conditions: An in Situ Time-Resolved Spectroscopic Study

Ruano-Sánchez, Daniel; Cored-Bandrés, Jorge; Azenha, C.; Pérez-Dieste, Virginia; Mendes, A.; Mateos-Pedrero, C.; Concepción Heydorn, Patricia (American Chemical Society, 2019-04-05)

[EN] The dynamic behavior of a CuO/ZnO/Ga2O3 catalyst under methanol steam reforming (MSR) reaction conditions promoted by a high dispersion of the copper nanoparticles and defect sites of a nonstoichiometric ZnGa2O4 spinel ...
Effects of flow variations on the galvanic corrosion of the copper/AISI 304 stainless steel pair in lithium bromide using a zero-resistance ammeter

Montañés Sanjuan, María Teresa; Sánchez Tovar, Rita; García Antón, José; Pérez-Herranz, Valentín (Electrochemical Science Group, 2012-01)

[EN] The effects of flow variations on the galvanic corrosion of the copper/AISI 304 stainless steel pair in a concentrated lithium bromide solution were investigated in a hydraulic circuit applying different flow steps ...
Effects of Hydrodynamic Conditions and LiBr Concentration on the Corrosion of Copper in LiBr Absorption Machines

Leiva García, Rafael; Muñoz-Portero, M.J.; Garcia-Anton, Jose; Sánchez Tovar, Rita (Electrochemical Science Group, 2012-02)

Refrigeration absorption machines are again considered as suitable refrigeration systems and they are replacing compression machines due to the ban of chlorofluorocarbons (CFCs) and the strict regulations of hydrochlorof ...
El cobre como fotocatalizador en procesos de catálisis homogénea en aguas altamente salinas

Orts Beneito, Xavier (Universitat Politècnica de València, 2022-09-13)

[ES] La escasez de agua y la contaminación de grandes cuerpos hídricos por sustancias emergentes justifican la necesidad de desarrollar nuevos métodos de tratamiento de aguas. En los últimos años, procesos de oxidación ...
El fango activado como adsorbente de cobre, níquel y cianuro

Castro Rubio, Estefanía; Lloret Salinas, Sergio; Aguado García, Daniel; Barat, Ramón (Infoedita, 2019-10)

[EN] Conventional wastewater treatment plants (WWTP) used to get an insufficient removal of pollutants such as copper, nickel and cyanide, which can affect the aquatic media quality that receiving the final effluent. In ...
Electrochemical analysis of coffin portraits from the National Museum in Krakow

Domenech Carbo, Antonio; del Hoyo-Melendez, Julio M.; Labut, Maria; Domenech Carbo, Mª Teresa (Springer-Verlag, 2021-12)

[EN] An electrochemical study was conducted on a series of samples taken from the metal supports of ten coffin portraits and one funeral portrait from the collection of the National Museum in Krakow (Poland) as a part of ...
Electrochemical analysis of the first Polish coins using voltammetry of immobilized particles

Doménech Carbó, Antonio; Del Hoyo Meléndez, Julio M.; Domenech Carbo, Mª Teresa; Piquero-Cilla, Juan (Elsevier, 2017-01)

[EN] A series of 20 denarii from Boleslaus the Brave (992-1025) and Mieszko II Lambert (1025-1034), corresponding to the beginning of the Polish state were studied using the voltammetry of immobilized particles (VIMP) ...
Estudio de la corrosión en medios cercanos a la saliva de las aleaciones base Titanio-Niobio-Plata Y Titanio-Niobio-Cobre para las aplicaciones en campo biomédico

Zagorskiy-Virot, Vadim (Universitat Politècnica de València, 2021-03-09)

[ES] El titanio y sus aleaciones son materiales ampliamente utilizados en el campo biomédico, especialmente en los prótesis dentbucal. De hecho, las propiedades de estas aleaciones de titanio las convierten en los mejores ...
Estudio del efecto del fuego en los cambios microestructurales de las aleaciones del cobre

López Sánchez, Inmaculada (Universitat Politècnica de València, 2012-01-17)

Estudio de las transformaciones que los conductores de cobre sufren en distintas condiciones de trabajo, para lo cual hemos sometido a distintos conductores de 2.5, 4, 6 y 13 mm2 a temperaturas de 950, 975, 1000, 1050 y ...
Estudio técnico y propuesta de intervención de una pintura al óleo sobre lámina de cobre: Paisaje (s. XX)

Rubio Mora, Mar (Universitat Politècnica de València, 2021-09-21)

[ES] El presente Trabajo Final de Grado (TFG) se centra en el estudio de una pintura al óleo sobre una lámina de cobre perteneciente a una colección privada. La obra es de pequeño formato y representa un paisaje natural. ...
Evaluación de la eficiencia antibacteriana de recubrimientos sonoquímicos

Vizcaíno Gandía, Juan José (Universitat Politècnica de València, 2020-10-27)

[ES] Se pretende evaluar la efectividad antimicrobiana a lo largo del tiempo, en original y tras diversas tandas de ciclos de lavado, de un tejido con recubrimiento hecho por dos vías, una in situ (directamente sobre el ...
Ferrierite and Its Delaminated and Silica-Intercalated Forms Modified with Copper as Effective Catalysts for NH3-SCR Process

Swies, Aneta; Kowalczyk, Andrzej; Rutkowska, Malgorzata; DÍAZ MORALES, URBANO MANUEL; Palomares Gimeno, Antonio Eduardo; Chmielarz, Lucjan (MDPI AG, 2020-07)

[EN] The main goal of the study was the development of effective catalysts for the low-temperature selective catalytic reduction of NO with ammonia (NH3-SCR), based on ferrierite (FER) and its delaminated (ITQ-6) and ...
Ferrierite and Its Delaminated Forms Modified with Copper as Effective Catalysts for NH3-SCO Process

Swies, Aneta; Rutkowska, Malgorzata; Kowalczyk, Andrzej; DÍAZ MORALES, URBANO MANUEL; Palomares Gimeno, Antonio Eduardo; Chmielarz, Lucjan (MDPI AG, 2020-11)

[EN] Ferrierites and their delaminated forms (ITQ-6), containing aluminum or titanium in the zeolite framework, were synthetized and modified with copper by an ion-exchange method. The obtained samples were characterized ...
Highly selective fluorescence detection of hydrogen sulfide by using an anthracene-functionalized cyclam-CuII complex

Santos Figueroa, Luis Enrique; De la Torre Paredes, Cristina; El Sayed Shehata Nasr, Sameh; Sancenón Galarza, Félix; Martínez-Máñez, Ramón; Costero Nieto, Ana María; Gil Grau, Salvador; Parra, Margarita (Wiley-VCH Verlag, 2014-01)

An anthracene-functionalised cyclam-copper(II) complex for the detection of HS- in aqueous environments has been prepared. This probe displays poor fluorescence but can selectively and sensitively detect HS- anions in water ...
Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)

Szymaszek-Wawryca, Agnieszka; Summa, Paulina; Duraczynska, Dorota; DÍAZ MORALES, URBANO MANUEL; Motak, Monika (MDPI AG, 2022-11)

[EN] A series of clinoptilolite-supported catalysts, modified with hydrotalcite-like phase (HT) by co-precipitation, were prepared and tested in NH3-SCR reactions. It was found that deposition of HT on clinoptilolite ...
Influence of temperature and Reynolds number on the galvanic corrosion of the copper/AISI 304 stainless steel pair in lithium bromide using a zero-resistance ammeter

Montañés Sanjuan, María Teresa; Sánchez Tovar, Rita; García Antón, José; Pérez Herranz, Valentín (NACE International, 2012)

[EN] The effects of temperature and Reynolds number (Re) on the galvanic corrosion of the copper (UNS C15710)/AISI 304 (UNS S30400) stainless steel pair in a concentrated lithium bromide (LiBr) solution was investigated ...
Innovative Design of Heterogeneous Catalysts with Improved CO2 Hydrogenation Performance

Cored Bandrés, Jorge (Universitat Politècnica de València, 2023-03-30)

[ES] El cambio climático es una de las amenazas de nuestro tiempo. Los gases de efecto invernadero, como el CO2, son los principales causantes de este fenómeno, siendo necesario disminuir urgentemente sus emisiones. En ...
Involvement of nitric oxide (NO) and auxin in signal transduction of copper induced morphological responses in Arabidopsis seedlings

Petó, Andrea; Lehotai, Nóra; Lozano Juste, Jorge; Leon Ramos, Jose; Tari, Irma; Erdei, László; Kolbert, Zsuzsanna (Oxford University Press (OUP): Policy B - Oxford Open Option A, 2011-05-19)

Background and Aims Plants are able to adapt to the environment dynamically through regulation of their growth and development. Excess copper (Cu2+ ), a toxic heavy metal, induces morphological alterations in plant ...