{"id":18650,"date":"2018-03-09T09:07:16","date_gmt":"2018-03-09T09:07:16","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/empleo-de-tensioactivos-en-la-sa%c2%adntesis-de-catalizadores-micro-y-mesoporosos\/"},"modified":"2018-03-09T09:07:16","modified_gmt":"2018-03-09T09:07:16","slug":"empleo-de-tensioactivos-en-la-sa%c2%adntesis-de-catalizadores-micro-y-mesoporosos","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/empleo-de-tensioactivos-en-la-sa%c2%adntesis-de-catalizadores-micro-y-mesoporosos\/","title":{"rendered":"Empleo de tensioactivos en la s\u00edntesis de catalizadores micro y mesoporosos"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Pe\u00f1a L\u00f3pez M. Lourdes <\/strong><\/h2>\n<p>Mediante un detallado estudio del ph del gel de s\u00edntesis, de la concentraci\u00f3n de cta+, de la temperatura y tiempo de cristalizaci\u00f3n en la formaci\u00f3n de las diferentes mesofases en el sistema sio2:cta\/br:h2o, se ha encontrado que la fuerza directora para la formaci\u00f3n de las diferentes fases es la carga negativa de los silicatos formados durante la cristalizaci\u00f3n de los s\u00f3lidos mesoporosos, la cual ha de ser compensada por los cationes del tensioactivo. El mejor empaquetamiento de las especies cati\u00f3nicas de tensioactivo en t\u00e9rminos de minimizaci\u00f3n de energ\u00eda, provoca la formaci\u00f3n de las dierentes fases controlando el ph, la temperatura y el tiempo de cristalizaci\u00f3n.  por otra parte, la sililaci\u00f3n de materiales tipo ti-mcm-48 mediante hexametildisilazano aumenta en gran medida su actividad catal\u00edtica en la epoxidaci\u00f3n de ciclohexeno con terc-butilhidroper\u00f3xido. Adem\u00e1s se estudi\u00f3 el entorno local del titanio en catalizadores ti-mcm-48 calcinados y sililados mediante espectroscop\u00eda ir, reflectancia difusa, fotoluminiscencia y si-mas-rmn, apoyando por difracci\u00f3n de rayos-x y an\u00e1lisis termogravim\u00e9tricos. Se ha propuesto un modelo convincente de las posiciones activas de ti en la estructura ti-mcm-48.  adem\u00e1s, se estudi\u00f3 el papel de los tensioactivos en la cristalizaci\u00f3n de zeolita beta, obteni\u00e9ndose tiempos de cristalizaci\u00f3n m\u00e1s cortos para la completa formaci\u00f3n de la estructura de la zeolita beta cuando se compara con las s\u00edntesis llevadas a cabo en ausencia de los mismos. Los aspectos mecan\u00edsticos del aumento en la velocidad de cristalizaci\u00f3n se investigaron mediante resonancia magn\u00e9tica nuclear uni- y bi-dimensional y difracci\u00f3n de rayos-x, para investigar las interacciones moleculares entre los diferentes agentes directores de estructura y la red de la zeolita beta durante el curso de la cristalizaci\u00f3n.  finalmente, se ha realizado un estudio de la presencia de cationes na+ en la cristalizaci\u00f3n de zeolit<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Empleo de tensioactivos en la s\u00edntesis de catalizadores micro y mesoporosos<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Empleo de tensioactivos en la s\u00edntesis de catalizadores micro y mesoporosos <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Pe\u00f1a L\u00f3pez M. Lourdes <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 22\/07\/2002<\/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 Rey Garc\u00eda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: vicente Forn\u00e9s segu\u00ed <\/li>\n<li> Llopis alonso Francisco Jos\u00e9 (vocal)<\/li>\n<li>joaquin Perez pariente (vocal)<\/li>\n<li>sara Iborra chornet (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Pe\u00f1a L\u00f3pez M. Lourdes Mediante un detallado estudio del ph del gel de s\u00edntesis, de la concentraci\u00f3n [&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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[332,1116,305,25424,16820,17,20,9297,5155],"tags":[46802,46801,57732,57731,26810,12442],"class_list":["post-18650","post","type-post","status-publish","format-standard","hentry","category-ciencias-tecnologicas","category-estructura-de-los-compuestos-inorganicos","category-ingenieria-y-tecnologia-quimicas","category-mecanismos-de-las-reacciones-inorganicas","category-politecnica-de-valencia","category-quimica","category-quimica-inorganica","category-sintesis-quimica","category-tecnologia-de-catalisis","tag-fernando-rey-garcia","tag-joaquin-perez-pariente","tag-llopis-alonso-francisco-jose","tag-pena-lopez-m-lourdes","tag-sara-iborra-chornet","tag-vicente-fornes-segui"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/18650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=18650"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/18650\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=18650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=18650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=18650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}