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Browsing by Subject "Hydrogen"

Now showing items 1-20 of 58

Alginate as template in the preparation of active titania photocatalysts

Buaki-Sogo, Mireia; Serra, Marco; Primo Arnau, Ana María; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (WILEY-VCH Verlag GmbH & Co. KGaA,, 2012)

[EN] A simple and reliable procedure to prepare TiO2 and Au/TiO2 samples with high photocatalytic activity for hydrogen generation from water/methanol mixtures is reported, which uses natural alginate as the templating ...
Analysis of the effect of saturation gas, solution temperature and concentration on OH radical formation by ultrasonic irradiation for hydrogen production optimization

Erades de Quevedo, Raúl (Universitat Politècnica de València, 2020-05-22)

[ES] En el siguiente Trabajo de Fin de Máster se estudian los métodos dosimétricos de Weissler y Fricke para caracterizar la formación de radicales hidroxilo por radiación ultrasónica. Se emplea un transductor de frecuencia ...
Análisis de la viabilidad de la utilización de los molinos hidráulicos de la Real Acequia de Moncada para la producción de hidrógeno

Martinez Torres, Rafael (Universitat Politècnica de València, 2014-10-21)

[EN] The aim of this paper is to address the possibility of adapting the RAM watermills to produce hydrogen and thus to use clean energy for various uses. To do this we have calculated the energy generated (kWh / year) in ...
Application of gas-cooled Accelerator Driven System (ADS) transmutation devices to sustainable nuclear energy development

Abánades, A.; Garcia Hernandez, Carlos Rafael; García Fajardo, Laura; Escrivá, A.; Pérez-Navarro Gómez, Ángel; Rosales, J. (Elsevier, 2011-06)

The conceptual design of a pebble bed gas-cooled transmutation device is shown with the aim to evaluate its potential for its deployment in the context of the sustainable nuclear energy development, which considers high ...
Bioethanol steam reforming on Ni-based modified mordenite. Effect of mesoporosity, acid sites and alkaline metals

Da Costa Serra, Javier Francisco; Navarro Ruiz, María Teresa; Rey Garcia, Fernando; Chica, Antonio (Elsevier, 2012-04)

Support plays an important role in the preparation of highly active and selective bioethanol steam reforming catalysts since it helps in the dispersion of metal particles and enhances its activity via metal-support ...
Caracterización de electrodos porosos de níquel dopados con nanopartículas de Pd y Ag para la producción de hidrógeno

Navarro Díaz, Raúl (Universitat Politècnica de València, 2021-02-17)

[ES] En la actualidad, existe una dependencia elevada de los combustibles fósiles. El uso de dichos combustibles conlleva diversos problemas como la contaminación y el agotamiento de recursos. Para disminuir la dependencia ...
Catalizadores de Níquel basados en Sepiolita natural aplicados al reformado con vapor de Bioetanol

López Gil, Eva (Universitat Politècnica de València, 2013-06-17)

[ES] Preparación de catalizadores en la producción de hidrógeno a partir de bioetanol utilizando catalizadores de níquel soportados sobre sepiolita natural
Catalytic activation of ceramic H2 membranes for CMR processes

Escolástico Rozalén, Sonia; KJOLSETH, C.; Serra Alfaro, José Manuel (Elsevier, 2016-11-01)

[EN] The application of catalytic membrane reactors can overcome some of the disadvantages that reactions for the direct conversion of methane to fuels and petrochemicals present. Hydrogen separation membranes can shift ...
Classification of Fuel Cells

Ribes Greus, María Desamparados (Universitat Politècnica de València, 2010-05-13)

El objetivo es conocer los criterios más relevantes para la clasificación de las pilas de combustible en la actualidad, y en particular el basado en el tipo de electrolito y temperatura utilizados.
Comparative global warming impact and NOx emissions of conventional and hydrogen automotive propulsion systems

Desantes J.M.; Molina, Santiago; Novella Rosa, Ricardo; López-Juárez, Marcos (Elsevier, 2020-10-01)

[EN] With the rise of cleaner technologies for transport and the emergence of H-2 as a fuel, most of the emissions in the well-to-wheel process are shifting towards the energy carrier production (fuel or electricity). The ...
Comparative study of the prospects of hydrogen as an energy source

Korri, Mohamed Amin (Universitat Politècnica de València, 2018-11-16)

[ES] El hidrógeno como combustible tiene numerosas características prometedoras que le dan futuro como alternativa a los hidrocarburos, que a su vez ven su consumo más restringido a través de numerosas regulaciones sobre ...
Determination of transport properties of Ni(II) through a Nafion cation-exchange membrane in chromic acid solutions

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín; Ortega Navarro, Emma María (Elsevier, 2011-07-07)

The transport properties of a cation-exchange membrane in the presence of nickel sulphate solutions were investigated by means of chronopotentiometry. The interest of this study relies on the application to the treatment ...
Dimensionamiento de una instalación fotovoltaica de 30 kW combinado con un sistema de generación de hidrógeno en la provincia de Valencia (España)

Iranzo Fernández, Héctor (Universitat Politècnica de València, 2020-10-30)

[ES] Dimensionar una instalación fotovoltaica de 30 kW combinado con un sistema de producción de hidrogeno, a partir del exceso de energía generada, y su almacenamiento para la producción de electricidad en horas punta ...
Diseño y cálculo de un depósito de almacenamiento de hidrógeno para un vehículo industrial

Grueso Garrido, Ismael (Universitat Politècnica de València, 2020-11-30)

[ES] Con este TFG se pretende hacer extensivo el uso de las tecnologías de combustibles limpios derivados del empleo de células de hidrógeno, al sector de los vehículos industriales. El TFG plantea el diseño de un depósito ...
Double-template fabrication of three-dimensional porous nickel electrodes for hydrogen evolution reaction

Herraiz-Cardona, Isaac; Ortega Navarro, Emma María; Vázquez-Gómez, Lourdes; Pérez-Herranz, Valentín (PERGAMON-ELSEVIER SCIENCE LTD, 2012-02)

[EN] Three-dimensional (3D) porous nickel structures were fabricated via a double-template electrochemical deposition process. The construction of the foam structures was achieved by means of a hydrogen bubble dynamic ...
Effect of hydrogen addition on the OH* and CH* chemiluminescence emissions of premixed combustion of methane-air mixtures

Reyes, M.; Tinaut, F.V.; Giménez, B.; Pastor, José V. (Elsevier, 2018)

[EN] Chemiluminescence emissions measurements of OH* and CH* are used to characterize the combustion of blends of methane and hydrogen in air in a constant volume combustion bomb, with two sets of initial conditions. The ...
Electrochemical characterization of a NiCo/Zn cathode for hydrogen generation

Herraiz-Cardona, Isaac; Ortega Navarro, Emma María; Vázquez-Gómez, Lourdes; Pérez-Herranz, Valentín (PERGAMON-ELSEVIER SCIENCE LTD, 2011-09)

[EN] Hydrogen is considered to be the most promising candidate as a future energy carrier. One of the most used technologies for the electrolytic hydrogen production is alkaline water electrolysis. However, due to the high ...
Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation

Carrillo Abad, Jorge; García Gabaldón, Montserrat; Ortega Navarro, Emma María; Pérez-Herranz, Valentín (Elsevier, 2011-09)

An electrochemical reactor was developed to recover zinc from the spent pickling solutions coming from the hot dip galvanizing industry. These solutions mainly contain ZnCl2 and FeCl2 in aqueous HCl media. The effect of ...
Energy Efficiency Improvement of Alkaline Water Electrolysis by using 3D Ni Cathodes Fabricated via a Double-Template Electrochemical Process

Herraiz Cardona, Isaac; González Buch, Cristina; Ortega Navarro, Emma María; Garcia-Anton, Jose; Pérez-Herranz, Valentín (Associazione Italiana Di Ingegneria Chimica, 2013)

[EN] Alkaline water electrolysis is one of the easiest methods for hydrogen production, offering the advantage of simplicity. Moreover, it represents an environmentally friendly technology for production of high ...
Enhanced H2 Separation through Mixed Proton Electron Conducting Membranes Based on La5.5W0.8M0.2O11.25 d

Escolástico Rozalén, Sonia; Seeger, J.; Roitsch, S.; Ivanova, M.; Meulenberg, Wilhem Albert; Serra Alfaro, José Manuel (Wiley-VCH Verlag, 2013-08)

La5.5WO11.25- is a proton-conducting oxide that shows high protonic conductivity, sufficient electronic conductivity, and stability in moist CO2 environments. However, the H-2 flows achieved to date when using La5.5WO11.25- ...