{"id":80347,"date":"1999-08-07T00:00:00","date_gmt":"1999-08-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-textural-y-qua%c2%admico-fa%c2%adsica-superficial-de-zeolitas-de-interes-catala%c2%adtico\/"},"modified":"1999-08-07T00:00:00","modified_gmt":"1999-08-07T00:00:00","slug":"caracterizacion-textural-y-qua%c2%admico-fa%c2%adsica-superficial-de-zeolitas-de-interes-catala%c2%adtico","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/caracterizacion-textural-y-qua%c2%admico-fa%c2%adsica-superficial-de-zeolitas-de-interes-catala%c2%adtico\/","title":{"rendered":"Caracterizaci\u00f3n textural y qu\u00edmico f\u00edsica superficial de zeolitas de inter\u00e9s catal\u00edtico."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Perdig\u00f3n Mel\u00f3n Jos\u00e9 Antonio <\/strong><\/h2>\n<p>En este trabajo hemos puesto a punto un m\u00e9todo que nos permite deducir la textura de zeolitas de nueva s\u00edntesis mediante la adsorci\u00f3n de mol\u00e9culas sonda de distinto tama\u00f1o, forma y flexibilidad estructural, utilizando la microcalorimetr\u00eda de absorci\u00f3n. Con esta t\u00e9cnica la informaci\u00f3n no se reduce simplemente a la determinaci\u00f3n del tama\u00f1o de los mircroporos, sino que se pueden obtener otros datos texturales de gran importancia como la existencia de cavidades o la forma de los microporos.  el m\u00e9todo consisti\u00f3 en determinar como variaba la densida de empaquetamiento (cantidad adsorbida pro cent\u00edmetro c\u00fabico de volumen microporoso) de un conjunto de adsorbatos (n-hexano, ciclohexano, benceno, tolueno, m-sileno y 1,3,5-trimetilbenceno) en zeolitas de textura conocida y representativas de las  encontradas hasta el momento (zeolitas con microporos unidireccionales de distinta forma y tama\u00f1o, o zeolitas con microporos en  distintas direcciones que se cruzan dando lugar a cavidades). A partir de este estudio y determinado las densidades de empaquetamiento de esos adsorbatos en zeolitas de nueva s\u00edntesis pudimos determinar su textura.  la microcalorimetr\u00eda de adsorci\u00f3n tambi\u00e9n ha sido utilizada para el estudio de la acidez superficial, usando como mol\u00e9cula sonda las propias mol\u00e9culas arom\u00e1ticas, mol\u00e9culas de baja basicidad pero similar a la que presentan las mol\u00e9culas org\u00e1ncias usadas en las reacciones catal\u00edticas, lo que da idea de que centros \u00e1cidos pueden realmente catalizar una reacci\u00f3n. este estudio se realiz\u00f3 porque se observ\u00f3 que las isotermas volum\u00e9tricas presentaban un calor de adsorci\u00f3n inicial m\u00e1s elevado debido a la interacci\u00f3n espec\u00edfica del anillo arom\u00e1tico y dichos centros \u00e1cidos.  la adsorci\u00f3n de agua ha permitido, de forma an\u00e1loga al estudio de la acidez, estudiar la hidrofilidad e hidrofobidad de un conjunto de zeolitas con distinto contenido en titanio y sin alumnio, demostrando que el ag<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizaci\u00f3n textural y qu\u00edmico f\u00edsica superficial de zeolitas de inter\u00e9s catal\u00edtico.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizaci\u00f3n textural y qu\u00edmico f\u00edsica superficial de zeolitas de inter\u00e9s catal\u00edtico. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Perdig\u00f3n Mel\u00f3n Jos\u00e9 Antonio <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Alcal\u00e1<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 08\/07\/1999<\/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>Jos\u00e9 Mar\u00eda Guil Pinto<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Luis Sotelo sancho <\/li>\n<li>Francisco Mendicuti Madrid (vocal)<\/li>\n<li>Jes\u00fas Alberto Pajares somoano (vocal)<\/li>\n<li>joaquin Perez pariente (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Perdig\u00f3n Mel\u00f3n Jos\u00e9 Antonio En este trabajo hemos puesto a punto un m\u00e9todo que nos permite deducir [&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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