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Listar por palabra clave "Porous materials"

Mostrando ítems 1-20 de 22

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A Porphyrin-Based Covalent Organic Framework as Metal-Free Visible-LED-Light Photocatalyst for One-Pot Tandem Benzyl Alcohol Oxidation/Knoevenagel Condensation

Oudi, Sara; Reza Oveisi, Ali; Daliran, Saba; Khajeh, Mostafa; Amarajothi, Dhakshina Moorthy; García Gómez, Hermenegildo (MDPI AG, 2023-02)

[EN] A porphyrin-based covalent organic framework (COF), namely Porph-UOZ-COF (UOZ stands for the University of Zabol), has been designed and prepared via the condensation reaction of 5,10,15,20-tetrakis-(3,4-dihydroxyph ...
Acoustic characterization of porous materials using a PU probe

Ribera Tejeda, Marco Antonio (Universitat Politècnica de València, 2024-01-04)

[EN] The PU probe technique allows in-situ surface impedance measurements of porous materials with minimal sample preparation and measurement setup. However, this technique comes at the cost of multiple additional factors, ...
An electroacoustic method for measuring airflow resistivity of porous sound-absorbing materials

Alba, Jesus; Arenas, Jorge P.; Rey Tormos, Romina María del; Rodríguez-Vercher, Juan-Carlos (Elsevier, 2019)

[EN] In this paper, a method for measuring the airflow resistivity of air-saturated porous sound-absorbing materials is presented. The method is based on a modification of the previous device developed by Dragonetti et al. ...
Broadband quasi perfect absorption using chirped multi-layer porous materials

Jimenez, Noe; Romero García, Vicente; Cebrecos, Alejandro; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; García-Raffi, L. M. (AIP Publishing, 2016-12)

This work theoretically analyzes the sound absorption properties of a chirped multi-layer porous material including transmission, in particular showing the broadband unidirectional absorption properties of the system. Using ...
Catalysis using multifunctional organosiliceous hybrid materials

Díaz Morales, Urbano Manuel; Brunel, Daniel; Corma Canós, Avelino (Royal Society of Chemistry, 2013)

[EN] Organic inorganic hybrid materials with different levels of structuration and porous hierarchy and one or several types of active sites in the framework can catalyze multistep chemical processes in a one-pot reactor ...
Computational study on the effect of the microstructure on macroscopic properties for carbon fiber felts

Rico Orero, Joan Baptista (Universitat Politècnica de València, 2020-07-29)

[EN] Carbon/phenolic ablators are successfully used as thermal protection materials for spacecraft. Nevertheless, the characterization of their properties experimentally in a microscopic scale is expensive and time-consuming. ...
Derivation of the method of characteristics for the fluid dynamic solution of flow advection along porous wall channels

Desantes Fernández, José Mª; Serrano Cruz, José Ramón; Arnau Martínez, Francisco José; Piqueras Cabrera, Pedro (Elsevier, 2012-07)

This paper describes in detail a novel formulation of the method of characteristics for its application to solve one-dimensional compressible unsteady non-homentropic flow advected along porous wall channels. In particular, ...
Diseño de sistemas basados en materiales porosos para la liberación controlada de agentes naturales contra plagas

Arroyo Fructuoso, Alba (Universitat Politècnica de València, 2020-04-01)

[ES] La aplicación de productos químicos sintéticos para el control de plagas genera importantes problemas medioambientales y hace que sea necesario el estudio de nuevos sistemas más sostenibles y ecológicos. Una alternativa ...
Enhanced transmission band in periodic media with loss modulation

Cebrecos Ruiz, Alejandro; Picó Vila, Rubén; Romero García, Vicente; Yasser, A. M.; Maigyte, L.; Herrero, R.; Botey, M.; Sánchez Morcillo, Víctor José; Staliünas, Kestutis (American Institute of Physics (AIP), 2014-11-17)

We study the propagation of waves in a periodic array of absorbing layers. We report an anomalous increase of wave transmission through the structure related to a decrease of the absorption around the Bragg frequencies. ...
Estimating the airflow resistivity of porous materials in an impedance tube using an electroacoustic technique

Rodríguez-Vercher, Juan-Carlos; Alba, Jesus; Arenas, Jorge P.; del Rey, Romina (Elsevier, 2022-12)

[EN] Airflow resistivity is an essential parameter for characterizing air-saturated porous sound-absorbing materials theoretically and selecting sound-absorbing materials in practice. Although standardized methods can ...
Estudio de la síntesis de sólidos microporosos usando amonios cuaternarios derivados del 4,4'-bis(clorometil)-1,1'-bifenil como agentes directores de estructura en la sintesis hidrotermal de zeolitas

Hernandis Altur, Vicente (Universitat Politècnica de València, 2019-07-30)

[ES] En este trabajo de fin de grado se han sintetizado materiales microporosos, zeolitas, a partir de derivados del 4,4'-bis(clorometil)-1,1'-bifenil sustituyendo los cloros por aminas terciarias como son la trimetilamina, ...
Evaluación por análisis numérico de un nuevo biomaterial metálico poroso para prótesis óseas

Quevedo González, Fernando José (Universitat Politècnica de València, 2013-03-05)

[ES] Entre los principales problemas de multitud de prótesis óseas, en especial las de cadera, se sitúa el fenómeno de protección de tensiones o stress shielding, que se produce como consecuencia de la diferencia de rigideces ...
Experimental theoretical methodology for determination of inertial pressure drop distribution and pore structure properties in wall-flow diesel particulate filters (DPFs)

Payri González, Francisco; Broatch Jacobi, Jaime Alberto; Serrano Cruz, José Ramón; Piqueras Cabrera, Pedro (Elsevier, 2011-12)

Wall-flow particulate filters have been placed as a standard technology for Diesel engines because of the increasing restrictions to soot emissions. The inclusion of this system within the exhaust line requires the development ...
Heat and fluid flow past a vertical plate with lateral mass flux in a porous medium

Cortell Bataller, Rafael (Inderscience, 2012)

[EN] A numerical analysis for free convection boundary layers along a permeable vertical flat surface with prescribed power-law temperature distribution T w(x) = T¿ + Ax k at y = 0 embedded in a fluid-saturated porous ...
Heat transfer modelling in honeycomb wall-flow diesel particulate filters

Galindo, José; Serrano Cruz, José Ramón; Piqueras, P.; García Afonso, Óscar (Elsevier, 2012-07)

Heat transfer in wall-flow monoliths has gained in interest because of the widespread adoption of these systems by automotive industry to fulfil soot emission regulations and the importance of heat exchange on the regeneration ...
Métodos de ensayo de la resistencia al flujo de materiales absorbentes acústicos

Cózar Martínez, Fernando (Universitat Politècnica de València, 2014-03-11)

Un parámetro principal que rige el comportamiento acústico de los materiales porosos para la absorción acústica es la resistencia al flujo. La ISO 9053 especifica dos métodos diferentes de medida de la resistencia al ...
Porous Sulfur-Based Materials for Photocatalytic Applications

Silva Gaspar, Beatriz (Universitat Politècnica de València, 2024-03-03)

[ES] La presente tesis doctoral se centró en el desarrollo y modificación de materiales microestructurados basados en sulfuros metálicos para la producción de combustibles solares. Se obtuvieron y caracterizaron dos nuevos ...
Processing and Characterization of Alpha-Ti Alloys by means of Powder Metallurgy Processing and Blender Elemental

Devesa Albeza, Francisco; Rial Domínguez, Silvia; Amigó Borrás, Vicente (Trans Tech Publications, 2012-08)

Titanium is an increasingly used material on industry. Based on Ti and titanium alloys characteristics, one of the most favorable processing methods is the powder metallurgy. Attending to microstructure, alloys showing p ...
Síntesis y aplicación de materiales porosos basados en sílice para un control sostenible de contaminaciones fúngicas en cítricos.

Arroyo Fructuoso, Alba (Universitat Politècnica de València, 2021-12-13)

[ES] Este trabajo se basa en la síntesis y aplicación de materiales porosos basados en sílice sintetizados con cationes orgánicos de diferente tamaño realizando combinaciones a diferentes temperaturas y diferentes tiempos ...
Synthesis and characterization of the all-silica pure polymorph C, and the enriched polymorph B intergrowth material of Beta zeolite

Cantin Sanz, Angel; Corma Canós, Avelino; Díaz Cabañas, Mª José; Jorda Moret, Jose Luis; Moliner Marin, Manuel; Rey Garcia, Fernando (John Wiley & Sons, 2006)