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Dissertations / Theses on the topic 'Zeolit BEA'

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Published: 24 April 2022

Last updated: 30 July 2025

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1

Kleinübing, Sirlei Jaiana. "Remoção de cadmio, chumbo e cobre utilizando zeolita natural clinoptilolita em coluna de leito fixo." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267629.

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Orientador: Meuris Gurgel Carlos da Silva<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-06T21:16:51Z (GMT). No. of bitstreams: 1 Kleinubing_SirleiJaiana_M.pdf: 1126683 bytes, checksum: 553f8d655916b1ac3c43231a2e0bbc05 (MD5) Previous issue date: 2006<br>Resumo: Neste trabalho foi estudada a remoção do íon cádmio, chumbo e cobre pela zeólita natural Clinoptilolita. Este estudo foi realizado em coluna de leito fixo construído em acnlico nas dimensões de 13,3 em de altura e 1,4 em de diâmetro interno. O estud

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2

Forte, Marcus Bruno Soares 1980. "Purificação de acido clavulanico utilizando zeolitas." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255532.

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Orientadores: Maria Isabel Rodrigues, Francisco Maugeri Filho<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-10T13:37:00Z (GMT). No. of bitstreams: 1 Forte_MarcusBrunoSoares_M.pdf: 5091221 bytes, checksum: f695e6ea266b0c682b2b8ce3dcc509ae (MD5) Previous issue date: 2008<br>Resumo: O presente trabalho teve como objetivo principal a separação e purificação de acido clavulanico a partir de caldo fermentado utilizando zeolitas. Foram utilizadas zeolita natural (ZN) e sintetica faujasita (13X), ambas modi

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3

Ameh, Emmanuel Alechine. "Sustainable synthesis of BEA zeolite from fly ash-based amorphous silica." University of Western Cape, 2019. http://hdl.handle.net/11394/7522.

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Philosophiae Doctor - PhD<br>Power generation in South Africa depends majorly on the combustion of coal and the increasing demand for energy due to industrialisation and population growth signifies the continuous consumption of coal. During this process, a by-product known as coal fly ash (CFA) is generated which poses several environmental issues. The common management of the waste involves the disposal of CFA in landfills or the direct disposal to open uncultured lands, thus contaminating water bodies by the leaching of constituent CFA metals and salts that render arable land uncultiva

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4

Bonati, Matteo L. M. "Characterisation and mechanistic studies of the acylation of anisole catalaysed by zeolite BEA." Thesis, Nottingham Trent University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429426.

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5

Ozturk, Seckin. "Immobilization Of Zeolite Crystals On Solid Substrates For Biosensor Aplications." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611992/index.pdf.

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Electrochemical biosensors are cost effective, fast and portable devices, which can determine the existence and amounts of chemicals in a specific medium. These devices have many potential applications in many fields such as determination of diseases, process and product control, environmental monitoring, and drug research. To realize these potentials of the devices, many studies are being carried out to increase their sensitivity, selectivity and long term stabilities. Surface modification studies with various types of particles (metal nano particles, carbon nano tubes etc.) can be count amon

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6

Grabherr, Hildegard. "Einfluss von Zeolith A auf die Futteraufnahme, den Mineralstoff- und Energiestoffwechsel im peripartalen Zeitraum sowie auf die Nährstoffverdaulichkeit bei Milchkühen." Doctoral thesis, Universitätsbibliothek Leipzig, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:15-20100526-072207-0.

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Die hypocalcämische Gebärparese, insbesondere die subklinische Hypocalcämie, die oft nicht erkannt wird und Ursache vieler sekundär auftretender Folgeerkrankungen ist, stellt in der intensiven Milchviehhaltung ein bedeutendes Problem dar. Inzwischen gibt es eine Reihe verschiedener Vorbeugungsstrategien, wobei der Einsatz von Zeolith A als Ca-Binder in der Ration gegen Ende der Trächtigkeit eine relativ neue Präventionsmöglichkeit darstellt. Da zu diesem Futterzusatzstoff noch wenige Untersuchungen, insbesondere auf Nebeneffekte vorliegen, war das Ziel dieser Studien, den Einfluss von Zeolith

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7

Kuhn, Raquel Cristine. "Purificação de oligossacarideos utilizando coluna de leito fixo de zeolitas." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256546.

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Orientador: Francisco Maugeri Filho<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-07T02:51:20Z (GMT). No. of bitstreams: 1 Kuhn_RaquelCristine_M.pdf: 869149 bytes, checksum: 29e524283c358cff48f2049cd6406f50 (MD5) Previous issue date: 2006<br>Resumo: Os frutooligossacarídeos (FOS) são considerados ingredientes naturais de alimentos devido aos efeitos benéficos na proliferação de bifidobactérias no cólon humano, sendo classificados como prebióticos. Estudos recentes demonstram que a separação cromatogr

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8

Kirdeciler, Salih Kaan. "Preparation Of Functional Surfaces Using Zeolite Nanocrystals For Biosensor And Biomedical Applications." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614515/index.pdf.

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Zeolites are crystalline aluminosilicates which have highly ordered pore structures and high surface area. Also the tailorable surface properties, high ion-exchange capability, high chemical, thermal, and mechanical strength make these particles an important candidate for various application such as sensors, catalysis, dielectric materials, separation, and membrane technologies. Although zeolites have these unique properties, applications where zeolites are integrated into devices according to their application areas, are limited due to the powder form of the material. The purpose of the curr

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9

Sammoury, Hussein. "Synthesis of new zeolitic materials for hydroisomerization of n-alkanes by bifunctional catalysis to obtain medium distillates (C10-C14)." Thesis, Poitiers, 2017. http://www.theses.fr/2017POIT2289/document.

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Deux zéolithes nanocristaux de type *BEA et CP814E commerciales avec de différentes propriétés texturales, et une zéolithe microcristaux de type *BEA qui a été synthétisée durant cette thèse, ont été modifiées par une desilication en utilisant de différents traitements alcalins. Toutes les zéolithes parentes et certaines désilicées ont été sélectionnée pour le craquage du n-hexane, où aucune amélioration significative de la conversion n'a été observée après la désilication. Toutes les zéolithes parentes et quelques désilicées sélectionnées ont été transformés en leur forme bifonctionnelle par

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10

Astafan, Amir. "Synthèses, caractérisations et performances catalytiques des zéolithes nanoéponge de type structurale *BEA." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2269/document.

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La méthode à privilégier pour améliorer dans les zéolithes la diffusion des réactifs, des intermédiaires réactionnels et des produits est de raccourcir la longueur du chemin diffusionnel, c'est-à-dire de diminuer la taille des cristaux. La croissance des cristallites est fonction de la composition du gel de synthèse, du temps de cristallisation, de la température, etc. La maîtrise de cette croissance permet d'obtenir un large éventail de taille pouvant aller de plusieurs micromètres à seulement quelques dizaines de nanomètres. Dorénavant, il est possible de limiter le chemin diffusionnel à seu

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11

Reinhardt, Lutz. "Bikontinuierliche Kompositmembranen: Untersuchung ihrer Permeanzen bei höheren Temperaturen und ihr Einsatz zur Gastrocknung." Universitätsverlag Chemnitz, 2017. https://monarch.qucosa.de/id/qucosa%3A33913.

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Gegenstand dieser Arbeit ist es, die Temperaturbeständigkeit von bikontinuierlichen Kompositmembranen bestehend aus Zeolith 4A und Visiomer HEMATMDI zu überprüfen und das Verhalten ihrer Permeanz im Verlauf der Temperaturerhöhung zu untersuchen. Weiterhin wird ihre Verwendbarkeit für technisch und industriell relevante Prozesse der Gastrocknung nachgewiesen. Zunächst wird thermogravimetrisch untersucht, bei welcher Temperatur Zersetzungserscheinungen an der polymeren Komponente auftreten. Anschließend wird thermogravimetrisch der Wassergehalt von Zeolith 4A im Bereich dieser Temperatur bestimm

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12

Skarlis, Stavros. "IR spectroscopy based kinetic modeling of NH3-SCR on Fe-zeolites : application for diesel engines aftertreatment system simulation." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10092/document.

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La réduction catalytique sélective des oxydes d'azote au moyen de l'urée ou de l'ammoniac est une technique établisse, pour une conversion efficace des NOx, qui existent dans le gaz d'échappement des moteurs Diesel mobiles. Parmi les formulations catalytiques proposées, les zéolithes échangées au fer sont considérés comme des catalyseurs SCR prometteuse, grâce à leur performance deNOx élevée, sur une large gamme des températures, ainsi qu'une résistance importante au vieillissement hydrothermique. Dans le cadre de cette thèse, une étude expérimentale détaillée des voies réactionnelles de la SC

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13

Galvánková, Lucie. "Možnosti využití vedlejších energetických produktů jako surovin pro hydrotermální reakce." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217109.

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The aim of this master thesis is study of possibilities of processing energy by-products, especially coal fly ash and fluidized bed ash, by hydrothermal treatment. Thanks to hydrothermal conditions and proper alkali activation of ashes we can obtain zeolites. Zeolites are microporous crystalline aluminosilicates which are use in many industrial sectors as catalysts, adsorbents and very good ion exchangers. The results of hydrothermal synthesis are influenced by many variable factors. This thesis mainly focused on influence of chosen alkali activator and the concentration of the activator toget

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14

Anwar, Adeel. "Enhancing properties of biodiesel via heterogeneous catalysis." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/enhancing-properties-of-biodiesel-via-heterogeneous-catalysis(7e52f44f-4c50-4cd3-b5a8-cf6ce714b7d6).html.

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Biodiesel is a re-emerging biofuel as an alternative to the traditional petroleum derived diesel. There are however, several factors that currently hinder the widespread uptake. Majority of the biodiesel are currently produced from edible oils thereby sparking the food versus fuel debate, the cost of feedstock is significantly high, there are problems experienced in the traditional production process and the resulting fuel is of inadequate quality. This work focused on addressing the issue of poor cold flow properties to improve the overall quality of biodiesel. The skeletal isomerisation of l

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15

Petryk, Mykhaylo, Sebastien Leclerc, Daniel Canet, and Jacques Fraissard. "Mathematical modeling and visualization of gas transport in a zeolite bed using a slice selection procedure." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194491.

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We present the analytical solution of the equations of gas diffusion in a heterogeneous zeolite bed. The problem is handled by assuming that the bed consists of a large number of very thin layers of solid, perpendicular to the direction of propagation of the gas. Mass transfer by diffusion in such a material is determined by a system of differential equations with boundary and interface conditions. The results allow the theoretical determination of the time dependence of the concentration profiles and the inter- and intra-crystallite diffusion coefficients of a gas in each layer of the bed. A

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16

Huong, Thi Thanh Tong. "Boron coordination and co-incorporation of Al, Ga in *BEA borosilicate and dissolution of zeolite nanoparticles from large particles in organic solvents." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985295201.

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17

Skarlis, Stavros. "IR spectroscopy based kinetic modeling of NH3-SCR on Fe-zeolites : application for diesel engines aftertreatment system simulation." Electronic Thesis or Diss., Lille 1, 2013. http://www.theses.fr/2013LIL10092.

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La réduction catalytique sélective des oxydes d'azote au moyen de l'urée ou de l'ammoniac est une technique établisse, pour une conversion efficace des NOx, qui existent dans le gaz d'échappement des moteurs Diesel mobiles. Parmi les formulations catalytiques proposées, les zéolithes échangées au fer sont considérés comme des catalyseurs SCR prometteuse, grâce à leur performance deNOx élevée, sur une large gamme des températures, ainsi qu'une résistance importante au vieillissement hydrothermique. Dans le cadre de cette thèse, une étude expérimentale détaillée des voies réactionnelles de la SC

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18

Batalha, Nuno Miguel Rocha. "Optimization of the balance between activity and selectivity on a hydroisomerization catalyst." Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2268/document.

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Un des principaux défis lors de l'élaboration des catalyseurs adéquats pour le procédé de déparaffinage catalytique (hydroisomérisation) est de maximiser le rendement en isomères et l'activité du catalyseur, tout en maintenant une faible sélectivité en produits de craquage. En effet, des catalyseurs avec sélectivité de forme à base de zéolithes à taille de pore intermédiaire, par exemple Pt/ZSM-22, sont sélectives en isomères, tandis que les zéolithes à large pore sont plus actifs, mais moins sélectif. L'objectif principal de cette thèse était, alors, d’étudier et de développer un catalyseur à

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19

Chaves, Thiago Faheina. "Síntese e avaliação catalítica das zeólitas com estrutura BEA, MFI e MTW na reação de Knoevenagel." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/3955.

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Made available in DSpace on 2016-06-02T19:55:40Z (GMT). No. of bitstreams: 1 6262.pdf: 12922381 bytes, checksum: d9847d4190f445fab3aa2cb28bd467a1 (MD5) Previous issue date: 2014-08-22<br>Universidade Federal de Minas Gerais<br>The use of zeolites in basic catalysis is small, especially when compared to the numerous applications of material in their acid form. Inside this context, are even smaller the number of studies on the use of as-synthesized zeolites as basic catalysts. Zeolites are crystalline hydrated aluminosilicates that have a pores size well-defined. Many of zeolite structures nee

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20

Solmus, Ismail. "An Experimental Study On The Performance Of An Adsorption Cooling System And The Numerical Analysis Of Its Adsorbent Bed." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613973/index.pdf.

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In this thesis, firstly, the equilibrium adsorption capacity of water on a natural zeolite at several zeolite temperatures and water vapor pressures has been experimentally determined for adsorption and desorption processes. Additionally, the modified Dubinin-Astakhov adsorption equilibrium model has been fitted to experimental data and separate correlations are obtained for adsorption and desorption processes as well as a single correlation to model both processes. Experimental results show that the maximum adsorption capacity of natural zeolite is nearly 0.12 kgw/kgad for zeolite temperature

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21

Magdalena, Carina Pitwak. "Síntese de zeólitas de cinzas de carvão modificada por surfactante e aplicação na remoção de ácido laranja 8 de solução aquosa: estudo em leito móvel, coluna de leito fixo e avaliação ecotoxicológica." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-06032015-141323/.

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No presente estudo, material zeolítico sintetizado a partir de cinzas de carvão e modificado por surfactante catiônico foi utilizado na remoção do corante ácido laranja 8 (AL8) por processo de adsorção utilizando leito móvel e coluna de leito fixo. As matérias primas e os adsorventes foram caracterizados por diferentes técnicas, tais como: difração de raios-x, fluorescência de raios-X, entre outras. A adsorção do AL8 foi realizada por leito móvel com o objetivo de otimizar os resultados quando lançados em leito fixo. Os efeitos na adsorção do AL8 sobre zeólita foram comparados: (1) efeito dos

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22

Ciantar, Marine. "Étude des premières étapes de l'oligomérisation des zéolithes par simulation moléculaire de Monte Carlo cinétique (kMC)." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066292.

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Ce travail de recherche portant sur la compréhension des premières étapes de synthèse des zéolithes s'inscrit dans le cadre général de développements efficients de nouveaux catalyseurs performants. De nombreuses incertitudes demeurent quant aux mécanismes moléculaires de leur formation, en particulier lors de la nucléation en conditions de synthèse hydrothermale. Dans ce contexte, une méthodologie globale a été proposée afin d'évaluer l'impact des variables de synthèse sur la formation des espèces siliciques. La réalisation de ce travail a nécessité l'usage de différentes méthodes théoriques,

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23

Petryk, Mykhaylo, Sebastien Leclerc, Daniel Canet, and Jacques Fraissard. "Mathematical modeling and visualization of gas transport in a zeolite bed using a slice selection procedure: Mathematical modeling and visualization of gas transport in azeolite bed using a slice selection procedure." Diffusion fundamentals 4 (2007) 11, S. 1-23, 2007. https://ul.qucosa.de/id/qucosa%3A14283.

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We present the analytical solution of the equations of gas diffusion in a heterogeneous zeolite bed. The problem is handled by assuming that the bed consists of a large number of very thin layers of solid, perpendicular to the direction of propagation of the gas. Mass transfer by diffusion in such a material is determined by a system of differential equations with boundary and interface conditions. The results allow the theoretical determination of the time dependence of the concentration profiles and the inter- and intra-crystallite diffusion coefficients of a gas in each layer of the bed. A

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24

Brigden, Clive. "A study of the synthesis chemistry, structure formation and characterization of all-silica, aluminium-, scandium- and copper-containing MFI and BEA type zeolites synthesized in fluoride and caustic media." Thesis, University of Wolverhampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542315.

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25

Zuo, Hualiang [Verfasser], and Elias [Akademischer Betreuer] Klemm. "Selective oxidation of methane to hydrocarbon oxygenates using H2O2 over Fe-containing MFI zeolites in a micro fixed-bed reactor / Hualiang Zuo ; Betreuer: Elias Klemm." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2018. http://d-nb.info/117180296X/34.

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Aribert, Nicolas. "Acylation hétérogène de Friedel-Crafts en milieu CO2 supercritique." Phd thesis, Toulouse, INPT, 2009. http://oatao.univ-toulouse.fr/16222/1/aribert.pdf.

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L’acylation de Friedel-Crafts est parmi les réactions les plus fondamentales et les plus utiles pour former des cétones aromatiques. Bien que la mise en oeuvre de ces réactions soit habituellement pénalisante en termes de sous produits formés, de rendement atomique et de quantité de catalyseur utilisée, cette voie est encore largement utilisée dans l’industrie de la chimie fine. Ces dernières années, la prise de conscience de l’impact des activités industrielles sur l’environnement a mené les chimistes à travailler sur de nouvelles voies, moins dangereuses et plus respectueuses de l’environnem

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Oliveira, Ivy dos Santos. "Integração do tratamento microbiológico com células imobilizadas e tecnologias emergentes (Processos Oxidativos Avançados) para o tratamento de efluentes gerados na indústria têxtil." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-11022010-105753/.

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A integração de diferentes processos de tratamento na degradação de efluente têxtil foi avaliada utilizando-se a técnica de precipitação, processos oxidativos avançados (POA) e tratamento biológico aeróbio. Os POAs (Ozônio/UV e reagente de Fenton/UV) foram avaliados com experimentos em bateladas de acordo com um planejamento fatorial L18 (Método Tagushi) em função da vazão de ozônio, concentração de reagente Fenton, radiação UV, pH e temperatura. No tratamento microbiológico por processo contínuo, foi utilizado um reator de leito fluidizado com células imobilizadas de zeólitas e avaliados parâ

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Rodrigues, Alyne Freitas da Silva Bordalo. "Dessulfurização de butano líquido por adsorção mediante utilização de peneira molecular 13X." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-18012017-085923/.

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Atualmente, o tipo de propelente para produtos em aerossol mais usado no mundo é uma mistura de hidrocarbonetos leves (butano e propano - sendo o primeiro em maior proporção). Parte de seu processo de produção é a dessulfurização do butano líquido, através de adsorção em leito fixo usando peneiras moleculares 13X. A literatura científica não apresenta muitas publicações sobre o tema e considerando que a técnica de adsorção é fortemente dependente de dados experimentais para seu maior entendimento, é objetivo deste trabalho estudar este processo através do equilíbrio de adsorção, das curvas de

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Boroń, Paweł. "An influence of speciation of transition metal species introduced into zeolites on their catalytic activity in the processes of nitrogen oxides conversion." Praca doktorska, 2015. https://ruj.uj.edu.pl/xmlui/handle/item/45013.

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Wu, Chien-sheng, and 吳建昇. "High-Yield Synthesis of BEA Zeolite Nanocrystals." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/99349795719900302458.

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碩士<br>國立中央大學<br>化學工程與材料工程研究所<br>96<br>Zeolite BEA, with large pore size of 12-membered ring pore openings, is an industrial important catalyst for the transalkylation of toluene and C9 aromatics to produce xylene. It is also expected that if beta zeolite is made into nanocrystals, the higher external surface area may reduce the diffusion length and make the catalyst more effective. Consequently, the synthesis of beta zeolite nanocrystals has been the objectives of many researches. To synthesize smaller zeolite nanoparticles, one can either increase the ratio of organic-template or reduce the h

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Chen, Chien-Hung, and 陳建宏. "Preparation of Anti-Reflective BEA zeolite coating on glass." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/20805535144299903625.

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碩士<br>國立中央大學<br>化學工程與材料工程研究所<br>98<br>Compare to MFI zeolite,BEA zeolite has more porosity, so it is an ideal low-refractive material. For a glass substrate (ns=1.52), an ideal homogeneous AR l-ayer would need an index of 1.23. The easy way to achieve such a low inde-x is a porous coating. However, in most cases this would mean a porosity larger than 60% for silica. The goal of this research is to strengthen AR film and still have good anti-reflection effect. AR layers were prepared by dip-coating both sides of glass substrates with a sol made form a combination of nano-zeolite precursors,

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Su, JyunYi, and 蘇浚毅. "Study of Cyclohexanone Adsorption and Oxidation Reaction Oven zeolite Bed." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/23232784316386747015.

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碩士<br>義守大學<br>生物技術與化學工程研究所<br>101<br>「Cyclohexanone is widely used as photoresist for optoelectronic industry, and industrial organic solvents and paint solvents. This research is applied the adsorption characteristics of zeolite and oxidation ability of ozone to study the oxidation and decomposition of cyclohexanone. The analysis of products of cyclohexanone with ozone passing though zeolite is useful for understanding its oxidation mechanism. 　　There is no apparent difference in IR spectrum for different gases (air, O2, N2) carry cyclohexanone before and after flow through HY or ZSM-5 zeol

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Avhale, Abhijeet [Verfasser]. "Development of stainless-steel supported MFI and BEA type zeolite membranes = Entwicklung von edelstahlgestützten MFI- und BEA-Zeolithmembranen / vorgelegt von Abhijeet Avhale." 2010. http://d-nb.info/1002929717/34.

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Liao, Chien-Hsiang, and 廖健翔. "Comparison of post-combustion CO2 capture with 13X zeolite in fixed bed and fluidized bed." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/kgq9b5.

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碩士<br>國立中興大學<br>環境工程學系所<br>101<br>13X zeolite were employed as adsorbents for CO2 capture form gas steams by the fluidized bed. Research results were divided into the following two parts. The first part was found the optimum size of 13X zeolite to capture carbon dioxide. The results indicate that the best of adsorption capacity was obtained under 30 °C with 15 vol% CO2 inlet using sphere 13X zeolite (0.3-0.6 mm). The working capacity (qw) of sphere 13X zeolite (0.3-0.6 mm) reached 74.5 mg/g under 0.38 m/s of superficial velocity. The second part was the comparison of CO2 adsorption/desorption

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Grabherr, Hildegard. "Einfluss von Zeolith A auf die Futteraufnahme, den Mineralstoff- und Energiestoffwechsel im peripartalen Zeitraum sowie auf die Nährstoffverdaulichkeit bei Milchkühen." Doctoral thesis, 2009. https://ul.qucosa.de/id/qucosa%3A11006.

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Die hypocalcämische Gebärparese, insbesondere die subklinische Hypocalcämie, die oft nicht erkannt wird und Ursache vieler sekundär auftretender Folgeerkrankungen ist, stellt in der intensiven Milchviehhaltung ein bedeutendes Problem dar. Inzwischen gibt es eine Reihe verschiedener Vorbeugungsstrategien, wobei der Einsatz von Zeolith A als Ca-Binder in der Ration gegen Ende der Trächtigkeit eine relativ neue Präventionsmöglichkeit darstellt. Da zu diesem Futterzusatzstoff noch wenige Untersuchungen, insbesondere auf Nebeneffekte vorliegen, war das Ziel dieser Studien, den Einfluss von Zeolith

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Chou, Chia-Ying, and 周佳穎. "Treatment of Volatile Organic Compounds by Zeolite in a Fixed-bed with Microwave System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/6syrfr.

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碩士<br>國立臺北科技大學<br>環境工程與管理研究所<br>101<br>Taiwan''s semiconductor industry has grown rapidly in the recent years. Therefore, it demands a large amount of organic solvents which are pollution harms not only the environment but also human health. Among the acetone is mainly organic solvents of the semiconductor industry emissions. The zeolite rotor system is a common technology to treat organic solvents. However, the system has a higher equipment cost and secondary pollutants problem. Therefore, this study focuses on using the ZSM-5 with microwave system to treat acetone. The ZSM-5 has high adsorpt

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Yu-YueChen and 陳禹岳. "Study on synthesis of methyl bromide using zeolite Y in a packed-bed reactor." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/rcqned.

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JARRETT, ROBERT E. "Authigenic Minerals: Locality 80, Bed I Tuffs, Olduvai Gorge, Tanzania." 2014. http://scholarworks.gsu.edu/geosciences_theses/75.

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Understanding climatic and water-mineral chemistry affecting hominin habitats duringthe period 1.92 to 1.80 Ma in Paleolake Olduvai basin, Tanzania is of social and scientific interest. Previous Olduvai research reported climate cycles in bulk sample mineral analyses. Xray diffraction, X-ray fluorescence, and color analyses of Locality 80 Tuff Bed I samples tested the null hypothesis: Alteration mineralogy of Central Basin volcanic Tuffs IA through IF reflect salinity/alkalinity cycles. Such cyclicity was not found. Several primary authigenic minerals were confirmed, but not as previously repo

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Lee, Chi-Lin, and 李其霖. "CO2 capture from simulated IGCC with 13X zeolite by a daul-bed Temperature/Vacuum Swing Adsorption." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/91432774641155514406.

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碩士<br>國立中興大學<br>環境工程學系所<br>104<br>Commercially available spherical 13X zeolite was employed as sorbents for CO2 capture from synthetic gas of cylinder of integrated gasification combined cycle(IGCC) power plant and traditional power plant by a dual-bed temperature/vacuum swing adsorption system. The research included two parts as follows: The first part was the selection of the conditions of adsorption and desorption. The adsorption process was conducted at 30°C, 0 % water content. The desorption process was conducted at 120°C desorption temperature, and the desorption time was 20 min. At this

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Chen, Yi-jie, and 陳義杰. "Adsorption experiment for water and ethanol on 3A and 4A zeolite and simulation of breakthrough performance in the bed." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/26705900856607169662.

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碩士<br>國立中央大學<br>化學工程與材料工程研究所<br>98<br>In the distillation separation of ethanol vapor and water vapor, it can form an azeotrope at 78.2℃, at which there are 95.6wt% ethanol and 4.4wt% water. Traditional azeotropic distillation and extractive distillation to obtain anhydrous ethanol need more energy than adsorption. Adsorption as a low energy consumption process has attracted attention to apply in ethanol dehydration. This study obtained single component adsorption equilibrium data by the adsorption experiment for water and ethanol on 3A and 4A zeolite. Then this study obtained the isotherm cur

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KE, Ching-Min, and 柯景閔. "Application of immobilization of lysozyme on the extrudate-shaped Na-Y zeolite to disrupt cells：Recirculated packed bed disruption process." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/80613974438388739160.

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碩士<br>明志科技大學<br>生化工程研究所<br>95<br>Lysozyme was immobilized on the extrudate-shaped NaY zeolite and was used for the disruption of Micrococcus lysodeikticus cells in recirculated packed bed reactor. The influences of specific operating parameters (i.e. liquid velocity, lysozyme concentration, and cell concentration) on the density, and activity of immobilized lysozyme were investigated. For 2.0 mg/ml cell disruption process, the optimal conditions were observed to be 6.53 mg lys/g zeolite (density of immobilization), 197.25 units lys/g zeolite (activity of immobilization) and 30.21 units/mg (spe

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Wu, Jo-Yu, and 吳若瑜. "CO2 Capture from Flue Gas of Gasoline Power Generator with 13X zeolite by a Dual-bed Temperature/Vacuum Swing Adsorption." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/54222012626380227547.

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碩士<br>國立中興大學<br>環境工程學系所<br>102<br>Commercially available spherical 13X zeolite was employed as sorbents for CO2 capture from synthetic gas of cylinder and flue gas of gasoline power generator by a dual-bed temperature/vacuum swing adsorption system. Each column of dual-bed system consisted of cylindrical shell and inner column which was designed to pass through the steam fluid or the cooling water to increase or decrease the temperature of the inner column. The research included two parts as follows: The first part was the selection of the optimum sorbent to capture carbon dioxide. The adsorp

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[Verfasser], Huong-Thi-Thanh-Tong. "Boron coordination and co-incorporation of Al, Ga in *BEA borosilicate and dissolution of zeolite nanoparticles from large particles in organic solvents / vorgelegt von Huong Thi Thanh Tong." 2007. http://d-nb.info/985295201/34.

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Suwanprasop, Somsaluay. "I-Aromatisation of n-hexane and natural gasoline over ZSM-5 zeolite. II-Wet catalytic oxidation of phenol on fixed bed of active carbon." Phd thesis, 2005. http://oatao.univ-toulouse.fr/7318/1/suwanprasop.pdf.

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I - The production of aromatic hydrocarbons from n-hexane and natural gasoline over Pd loaded ZSM-5 zeolite in a tubular reactor was achieved under the suitable conditions at 400 °C, and 0.4 ml/min reactant feeding rate, employing ZSM-5 (0.5% Pd content) as a catalyst. Under these conditions, n-hexane and natural gasoline conversions were found to be 99.7% and 94.3%, respectively (with respective aromatic selectivity of 92.3% and 92.6%). II - Wet catalytic air oxidation of phenol over a commercial active carbon was studied in a three phase fixed bed reactor under mild temperature and oxygen pa

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Grabherr, Hildegard [Verfasser]. "Einfluss von Zeolith A auf die Futteraufnahme, den Mineralstoff- und Energiestoffwechsel im peripartalen Zeitraum sowie auf die Nährstoffverdaulichkeit bei Milchkühen / eingereicht von Hildegard Grabherr." 2010. http://d-nb.info/100488561X/34.

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Gallego, Sánchez Eva María. "SÍNTESIS DE ZEOLITAS CON PROPIEDADES TEXTURALES Y DE CONFINAMIENTO ADECUADAS PARA SU USO COMO CATALIZADORES EN REACCIONES QUÍMICAS DE INTERÉS INDUSTRIAL." Doctoral thesis, 2020. http://hdl.handle.net/10251/134015.

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[ES] Las zeolitas son materiales microporosos cristalinos formados por una red de tetraedros TO4 (T = Si, Al, Ti, ...) interconectados entre sí compartiendo átomos de oxígeno, que generan estructuras tridimensionales definidas por poros y cavidades de dimensiones moleculares. Su capacidad como tamices moleculares, junto con la gran diversidad de sólidos zeolíticos descritos en lo que respecta a topologías de poro, tipos de cavidades, composición química y propiedades texturales, hace de este tipo de materiales importantes catalizadores heterogéneos en procesos de gran interés para la industria

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Ntelane, Tau Silvester. "Effect of microwave radiation on Fe/ZSM-5 for catalytic conversion of methanol to hydrocarbons (MTH)." Diss., 2018. http://hdl.handle.net/10500/25165.

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The effect of microwave radiation on the prepared 0.5Fe/ZSM-5 catalysts as a post-synthesis modification step was studied in the methanol-to-hydrocarbons process using the temperature-programmed surface reaction (TPSR) technique. This was achieved by preparing a series of 0.5Fe/ZSM-5 based catalysts under varying microwave power levels (0–700 W) and over a 10 s period, after iron impregnating the HZSM-5 zeolite (Si/Al = 30 and 80). Physicochemical properties were determined by XRD, SEM, BET, FT-IR, C3H9N-TPSR, and TGA techniques. It was found that microwave radiation induced few changes in the

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