{"id":84691,"date":"2018-03-10T00:09:03","date_gmt":"2018-03-10T00:09:03","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sa%c2%adntesis-y-caracterizacion-de-montmorillonitas-apilaradas-con-alumnio-modificadas-por-incorporacion-de-galio-y-cerio\/"},"modified":"2018-03-10T00:09:03","modified_gmt":"2018-03-10T00:09:03","slug":"sa%c2%adntesis-y-caracterizacion-de-montmorillonitas-apilaradas-con-alumnio-modificadas-por-incorporacion-de-galio-y-cerio","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/sa%c2%adntesis-y-caracterizacion-de-montmorillonitas-apilaradas-con-alumnio-modificadas-por-incorporacion-de-galio-y-cerio\/","title":{"rendered":"S\u00edntesis y caracterizaci\u00f3n de montmorillonitas apilaradas con alumnio modificadas por incorporaci\u00f3n de galio y cerio"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Josefa Hernando Cos\u00edo <\/strong><\/h2>\n<p>El trabajo desarrollado en la presente tesis consiste en la preparaci\u00f3n de nuevos materiales apilarados, partiendo de montomorillonistas, introduciendo modificciones enlos procesos de apilaramientos con el cati\u00f3n keggin de aluminio.  los objetivos son obtener materiales apilarados con mayor estabilidad t\u00e9rmica de la estructura micorporosa generada, as\u00ed como una mayor selectividad hacia productos de craqueo, en reacciones de hidroisomerizaci\u00f3n-hidrocrqueo con n-alcanos, asociado a un mayor n\u00famero y fuerza de los centros \u00e1cidos que se generan en el proceso.  se obtienen nuevos materiales por incorporaci\u00f3n de galio en la estructura del polioxicati\u00f3n intercalado entre las l\u00e1minas de la arcilla, que origina unos materiales que mantienen su esructura microporosa hasta 700\u00c2\u00ba c, aunque las realciones y fuerzas de los centros \u00e1cidos br\u00ed\u00b6nsted y lewis generados desplazan la selectividad de los ensayos catal\u00edticos hacia la isomerizaci\u00f3n. se pone de manifiesto la sustituci\u00f3n del alumnio tera\u00e9drico por galio.  la incorporaci\u00f3n de cerio en el proceso, incrementa la realci\u00f3n y fuerza de los centros br\u00ed\u00b6nsted\/lewis, desplazando la selectividad hacia el craqueo y manteniendo la estabilidad estructural y textural con la participaci\u00f3n conjunta de cerio y galio.  por \u00fatlimo, modificando el proceso de incorporaci\u00f3n de cerio, a presi\u00f3n y temperatura, se obtienen materiales en los que se generan dos tipos de poros, uno de ellos de tama\u00f1o superior a los obtenidos anteriormente, alacanz\u00e1ndose en ellos los dos objetivos del trabajo, mayor craqueo y mayor estabilidad t\u00e9rmica, conjuntamente con la presencia de poros de mayor tama\u00f1o<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>S\u00edntesis y caracterizaci\u00f3n de montmorillonitas apilaradas con alumnio modificadas por incorporaci\u00f3n de galio y cerio<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 S\u00edntesis y caracterizaci\u00f3n de montmorillonitas apilaradas con alumnio modificadas por incorporaci\u00f3n de galio y cerio <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Josefa Hernando Cos\u00edo <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Cantabria<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 26\/05\/2000<\/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>Fernando Gonz\u00e1lez Mart\u00ednez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: julio Rodr\u00edguez fern\u00e1ndez <\/li>\n<li>Jos\u00e9 Mar\u00eda Rodriguez-izquierdo gil (vocal)<\/li>\n<li>inmaculada Benito rodr\u00edguez (vocal)<\/li>\n<li>vicente Sanchez escribano (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Josefa Hernando Cos\u00edo El trabajo desarrollado en la presente tesis consiste en la preparaci\u00f3n de nuevos materiales [&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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