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Dissertations / Theses on the topic 'High-silica zeolite'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Cheng, Chil-Hung. "High-silica zeolite nucleation from clear solutions." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3273.

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Understanding the mechanism of zeolite nucleation and crystallization will enable the zeolite science community to tune zeolite properties during synthesis in order to accommodate the purposes of various applications. Thus there has been considerable research effort in "deciphering" the mechanism by studying the growth course of tetrapropylammonium (TPA)-mediated silicalite-1 using several techniques, such as dynamic light scattering (DLS), small-angle X-ray/neutron scattering (SAXS/SANS), and nuclear magnetic resonance (NMR). While these studies have generated a more comprehensive picture on

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2

Gordon, James William. "Ester hydrolysis by high silica zeolites." Thesis, University of Edinburgh, 1985. http://hdl.handle.net/1842/13936.

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3

Sinclair, D. M. "Crystallization of high silica molecular sieves." Thesis, University of Edinburgh, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384262.

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4

Chihara, Kazuyuki, Kenta Saito, Hidenori Nakamura, and Yosuke Kaneko. "Diffusion measurement of chlorinated hydrocarbons into high-silica zeolite by chromatographic method: Diffusion measurement of chlorinated hydrocarbonsinto high-silica zeolite by chromatographic method." Diffusion fundamentals 6 (2007) 58, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14237.

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5

Chihara, Kazuyuki, Kenta Saito, Hidenori Nakamura, and Yosuke Kaneko. "Diffusion measurement of chlorinated hydrocarbons into high-silica zeolite by chromatographic method." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193946.

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6

Chihara, Kazuyuki, Takashi Matsumoto, and Kazunori Hijikata. "Azeotropic adsorption of organic solvent vapor mixture on high silica zeolite, mass transfer dynamics." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194773.

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7

Boruntea, Cristian-Renato. "Design, synthesis and characterization of small-pore zeolites for industrial environmental applications." Doctoral thesis, Universitat Politècnica de València, 2020. http://hdl.handle.net/10251/141094.

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[ES] El Proyecto de investigación aquí descrito se estructura en dos partes. La primera parte se centra en la investigación fundamental con el objetivo de crear un protocolo para la síntesis de zeolitas. La segunda parte se refiere al diseño, síntesis y caracterización de nuevas zeolitas, particularmente utiles para aplicaciones DeNOx,, pero también podría ser útil para aplicaciones MTO. La investigación fundamental sugiere un Nuevo modelo de preparación de zeolitas utilizando otras zeolitas como simiente. Este proceso se llama transformación zeolita-zeolita o también conversión interzeolita.

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8

Chihara, Kazuyuki, Yuki Teramura, Shinji Tomita, and Kenta Saito. "Diffusion of chlorinated hydrocarbons in high silica zeolite - comparison between chromatographic data and molecular dynamic simulation." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189478.

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9

Chihara, Kazuyuki, Yuki Teramura, Shinji Tomita, and Kenta Saito. "Diffusion of chlorinated hydrocarbons in high silica zeolite - comparison between chromatographic data and molecular dynamic simulation." Diffusion fundamentals 11 (2009) 24, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A13965.

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10

Sivadinarayana, C. "Characterization of high silica zsm-5, ga-modified zeolite (MFI) and deactivated catalysts in propane aromatization." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1996. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2933.

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11

Chihara, Kazuyuki, Takashi Matsumoto, and Kazunori Hijikata. "Azeotropic adsorption of organic solvent vapor mixture on high silica zeolite, mass transfer dynamics: Azeotropic adsorption of organic solvent vapor mixture on high silicazeolite, mass transfer dynamics." Diffusion fundamentals 3 (2005) 15, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14303.

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12

Zhao, Yixuan. "Nanocomposites de silices micro et méso poreuses/nanofils de Bi élaborés sous haute pression." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS082.

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Le bismuth présente des propriétés thermoélectriques modérées sous forme massive. La réduction de sa dimensionnalité (les nanofils de Bi) permet d’améliorer sa propriété thermoélectrique, c’est-à-dire l’amélioration du coefficient de Seebeck S, la diminution de la résistivité électrique et de la conductivité thermique. Ces nanofils permettraient une utilisation pour la réfrigération Peltier. Les silices micro- et méso-poreuses possèdent des canaux qui permet de confiner les atomes de Bi et donc d’y intercaler des fils de Bi de diamètre de l’ordre nanométrique. Le Bi fusionné à haute pression a

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13

Young, David. "Hydrothermal stability of high silica zeolites." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/9864.

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This thesis concerns the hydrothermal stability of two zeolite molecular sieves with the MFI structure, ZSM-5 and its 'aluminium free' form silicalite. Silicalite was synthesised from low pH alkali metal free aqueous gels at 95°C and characterised by XRD, SEM, DTA and TG. ZSM-5 was crystallised from similar reaction mixtures but with the addition of aluminium salts. It was found that the incorporation of aluminium into the ZSM-5 framework was favoured by higher reaction temperatures (l50°C) and the use of aluminium nitrate. Solubilities were measured for silicalite, ZSM-5, ZSM-11, ZSM-39, ZSM-

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14

Nock, A. "Catalysis by high silica/alumina ratio faujasitic zeolites." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370824.

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15

Emms, Tony. "Ion exchange and separations in high silica zeolites." Thesis, University of Salford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244886.

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16

Nee, James R. D. "Crystallisation of high-silica zeolites under ultrapure conditions." Thesis, University of Edinburgh, 1993. http://hdl.handle.net/1842/12710.

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17

Franks, A. P. "Adsorption of ethanol-water mixtures on high silica zeolites." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/38319.

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18

Brace, Shelley. "Synthetic and structural studies of high silica MFI zeolites." Thesis, Keele University, 2017. http://eprints.keele.ac.uk/3778/.

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A systematic series of high-silica fluoride MFI zeolites were efficiently synthesised using a variety of shape and size structure directing agents. The effects of these structure directing agents on the zeolite synthesised have been studied by the complementary use of X-ray diffraction and solid state NMR. These 14N, 13C and 29Si NMR experiments yield information about the orientation of the structure directing agent within zeolite pores. They also identify covalently bonded fluoride in the form of pentacoordinated silicon whereby the first case of static and dynamic ordering of fluoride in th

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19

Mamman, A. S. "Diffusion of pure liquid hydrocarbons in high silica pentasil zeolites." Thesis(M.Sc.), CSIR-National Chemical Laboratory, Pune, 1988. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2273.

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20

Durrani, Shahid Khan. "Nuclear recoil and radiation damage phenomena in high silica zeolites and boron-zeotypes." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305113.

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21

Patra, C. R. "Isopropylation of C-8 aromatic compounds (xylenes, ethylbenzene) over large pore high silica zeolites." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2002. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2430.

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22

Martanová, Jana. "Studium mikrostruktury autoklávovaného pórobetonu s využitím druhotných surovin." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372320.

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Autoclaved aerated concrete is a used building material, especially for its thermal insulating properties. During autoclaving, an aerated concrete microstructure produces crystalline CSH phases, primarily tobermorite. The ingoing substances are calcium oxide and silica. In addition to commonly used raw materials, secondary raw materials rich in silicon dioxide can be used for production. The use of secondary raw materials gives the opportunity for the construction industry to be more environmentally friendly. Another benefit is the reduction of financial costs. The work explores the influence

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23

Rivas, Cardona Alejandra. "Investigation of Zeolite Nucleation and Growth Using NMR Spectroscopy." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10400.

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Zeolite nucleation and growth is a complex problem that has been widely investigated but still not completely understood. However, a full understanding of this process is required in order to develop predictive models for the rational design and control of the zeolite properties. The primary objective of this dissertation is to determine the strength of organicinorganic interactions (i.e., the adsorption Gibbs energy) in transparent synthesis mixtures using PFG NMR spectroscopy, in order to provide more information for a better understanding of zeolite nucleation and growth. Three main tasks

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24

Lobo, Raul F. "The synthesis and characterization of novel high-silica zeolites." Thesis, 1995. https://thesis.library.caltech.edu/2631/1/Lobo_rf_1995.pdf.

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The synthesis and characterization of high-silica molecular sieves is reviewed using molecular recognition phenomena and structure-direction as the unifying themes. A comparative analysis between the synthesis conditions employed and the zeolite structures formed is carried out starting with the synthesis of clathradils or 0-dimensional zeolites, and extending to one-dimensional, multi-dimensional zeosils. The review finishes with the analysis of the combined effects of heteroatoms (Al, B and Zn) and organic structure-directing agents in zeolite product selectivity and thermodynamic stabilit

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25

Rossner, Campos Alfred Armin. "Adsorption of methyl tertiary-butyl ether on high-silica zeolites effects of adsorbent characteristics and natural organic matter on adsorption isotherms /." 2004. http://www.lib.ncsu.edu/theses/available/etd-07302004-170939/unrestricted/etd.pdf.

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26

Maanaso, Morule Fortune. "Hydrothermal synthesis and characterization of high-silica MFI zeolites with Titanium heteroatoms in the matrix and their testing in the catalytic oxidation with hydrogen peroxide as the oxidant." 2014. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001700.

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M. Tech. Chemical Engineering.<br>Discusses the scope of this research study composes of three interactive steps. The first step involves the design of the specific zeolite system (ZSM-5) and the set-up of an autoclave reactor for the hydrothermal synthesis of this and other zeolites and nano materials, then the oxidation catalyst (TS-1) development, i.e. the substitution of aluminium with titanium in the zeolite framework, and finally the formulation and preparation of the isomorphous Silicalite zeolite by omitting the aluminium in the synthesis. And further, set-up of suitable equipments and

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