{"id":3527,"date":"1994-01-01T00:00:00","date_gmt":"1994-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/1994\/01\/01\/caracterizacion-estructural-de-sistemas-base-para-catalizadores-de-tres-vias\/"},"modified":"1994-01-01T00:00:00","modified_gmt":"1994-01-01T00:00:00","slug":"caracterizacion-estructural-de-sistemas-base-para-catalizadores-de-tres-vias","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/caracterizacion-estructural-de-sistemas-base-para-catalizadores-de-tres-vias\/","title":{"rendered":"Caracterizacion estructural de sistemas base para catalizadores de tres vias"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Elena Gomez Rebollo <\/strong><\/h2>\n<p>La tesis doctoral aborda la caracterizacion estructural de sistemas del tipo de los empleados para catalisis de depuracion de gases en escapes del automovil, concretamente soportes ceria-alumina de alta area y metales de transicion dispersos sobre estos. Con las tecnicas experimentales de difraccion de rayos x, analisis termico (atd-tg) y microscopia electronica, tanto de barrido como de transmision, se ha examinado la relacion que puede tener la morfolog\u00eda de dichos solidos con la dispersion metalica y otras propiedades relevantes en tales sistemas. Los resultados obtenidos para los soportes muestran que, tras los tratamientos de preparacion empleados (impregnacion a humedad incipiente y precipitacion-deposicion de una solucion homogenea), se forman sobre la alumina agregados de oxido de cerio con distinta distribucion y relacion con la fase alumina, dependiendo del metodo de deposicion de la ceria, dando lugar a la estabilizacion termica de las fases de alumina de baja temperatura, frente a su transformacion en alfa-alumina (baja area). En cuanto a los sistemas metal\/ceria-alumina, la caracterizacion microscopica de las particulas de los oxidos de los metales de transicion platino, rodio y cobre, muestra que tanto la distribucion del elemento de transicion en la superficie como el tipo de oxido presente depende de la mayor o menor interaccion entre este y la fase superficial de oxido de cerio disperso.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizacion estructural de sistemas base para catalizadores de tres vias<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizacion estructural de sistemas base para catalizadores de tres vias <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Elena Gomez Rebollo <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1994<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li> Conesa Cegarra Jos\u00e9 Carlos<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Vicente Fernandez Herrero <\/li>\n<li>Jos\u00e9 Mar\u00eda Gonz\u00e1lez Calbet (vocal)<\/li>\n<li>Javier Soria Ruiz (vocal)<\/li>\n<li> Rojas Lopez Rosa Mar\u00eda (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Elena Gomez Rebollo La tesis doctoral aborda la caracterizacion estructural de sistemas del tipo de los empleados [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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