Academic literature on the topic 'Faujasite-type zeolite'

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Journal articles on the topic "Faujasite-type zeolite"

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Capa-Cobos, Luis Fernando, Ximena Jaramillo-Fierro, and Silvia González. "Computational Study of the Adsorption of Phosphates as Wastewater Pollutant Molecules on Faujasites." Processes 9, no. 10 (2021): 1821. http://dx.doi.org/10.3390/pr9101821.

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The adsorption of sodium dihydrogen phosphate (NaH2PO4) onto X- and Y-type faujasite zeolites was computationally studied using the Density Functional Theory (DFT) method. The structures were modeled using the Materials Studio software. The Si/Al ratios for the X- and Y-type zeolite models were 1.2 and 2.5, respectively. The central pore of the zeolite provided a more favorable coordination for adsorbing NaH2PO4. Full molecular optimization and adsorption energy calculations were performed using the VASP code. The adsorption was more effective on zeolite Y, with an adsorption energy of 161 kJ/
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A-K Mohammed, Abdul Halim, and Karim Khalifa Esgair. "FLUID CATALYTIC CRACKING OF PETROLEUM FRACTION (VACUUM GAS OIL) TO PRODUCE GASOLINE." Iraqi Journal of Chemical and Petroleum Engineering 11, no. 4 (2010): 33–45. http://dx.doi.org/10.31699/ijcpe.2010.4.4.

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In this work, fluid catalytic cracking of vacuum gas oil to produce gasoline over prepared faujasite type Y zeolite was investigated using experimental laboratory plant scale of fluidized bed reactor.The catalytic activity of prepared faujasite type NaY, NaNH4Y and NaHY zeolites was investigated. The cracking process was carried out in the temperature range 440 to 500 oC, weight hourly space velocity (WHSV) range 10 to 25 h-1 ,and atmospheric pressure . The catalytic activities of the prepared faujasite type NaY , NaNH4Y and NaHY zeolites were determined in terms of vacuum gas oil (VGO) conver
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Mauer, Volker, Christian Bläker, Christoph Pasel, and Dieter Bathen. "Energetic Characterization of Faujasite Zeolites Using a Sensor Gas Calorimeter." Catalysts 11, no. 1 (2021): 98. http://dx.doi.org/10.3390/catal11010098.

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In addition to the adsorption mechanism, the heat released during exothermic adsorption influences the chemical reactions that follow during heterogeneous catalysis. Both steps depend on the structure and surface chemistry of the catalyst. An example of a typical catalyst is the faujasite zeolite. For faujasite zeolites, the influence of the Si/Al ratio and the number of Na+ and Ca2+ cations on the heat of adsorption was therefore investigated in a systematic study. A comparison between a NaX (Sodium type X faujasite) and a NaY (Sodium type Y faujasite) zeolite reveals that a higher Si/Al rati
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Rentsenorov, Ulambayar, Batmunkh Davaabal, and Jadambaa Temuujin. "Synthesis of Zeolite A from Mongolian Coal Fly Ash by Hydrothermal Treatment." Solid State Phenomena 271 (January 2018): 1–8. http://dx.doi.org/10.4028/www.scientific.net/ssp.271.1.

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Raw coal fly ash and acid pretreated fly ash were used to synthesize A-type zeolite by hydrothermal treatment. In order to synthesize zeolite A an aqueous gel having a molar batch composition of Na2O:Al2O3:1.926SiO2:128H2O was utilized. Fly ash and zeolitic products were characterized by SEM, XRF, XRD and cation exchange capacity (CEC). After hydrothermal treatment, several types of zeolites were formed: zeolite A, analcime, faujasite and hydroxy-sodalite. The highest content of zeolite A was formed in the mixture treated at 80°C for 8 hours. CEC values of the zeolitic products were 28-38 time
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Boer, Dina G., Zahra Asgar Pour, Jort Langerak, Benny Bakker, and Paolo P. Pescarmona. "Binderless Faujasite Beads with Hierarchical Porosity for Selective CO2 Adsorption for Biogas Upgrading." Molecules 28, no. 5 (2023): 2198. http://dx.doi.org/10.3390/molecules28052198.

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Biomethane can be isolated from biogas through selective CO2 adsorption. Faujasite-type zeolites are promising adsorbents for CO2 separation due to their high CO2 adsorption capacity. While commonly inert binder materials are used to shape zeolite powders into the desired macroscopic format for application in an adsorption column, here we report the synthesis of Faujasite beads without the use of a binder and their application as CO2-adsorbents. Three types of binderless Faujasite beads (d = 0.4–0.8 mm) were synthesized using an anion-exchange resin hard template. All the prepared beads consis
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Fischer, Falk, Marianne Hadan, and Günter Fiedrich. "Zeolite Syntheses from Superalkaline Reaction Mixtures." Collection of Czechoslovak Chemical Communications 57, no. 4 (1992): 788–93. http://dx.doi.org/10.1135/cccc19920788.

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The synthesis of faujasite-type zeolite from superalkaline reaction mixtures are described. The contribution shows the influence of component K2O added in the system Na2O-Al2O3-SiO2-H2O with H2O/(K2O + Na2O) = 13-15. The reaction course was investigated in the range K2O/(K2O + Na2O) from about 0.07 to 0.5. Under used conditions it is quite possible to isolate faujasite-type zeolite as a single crystalline phase. By means of IR spectroscopy, low SiO2/Al2O3 ratios from 2.0 to 2.1 in the faujasite framework have been indicated. The low SiO2/Al2O3 ratios are interpreted by a higher stability of th
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Dal Pozzo, Daniel Marcos, José Airton Azevedo dos Santos, Edward Seabra Júnior, et al. "Free fatty acids esterification catalyzed by acid Faujasite type zeolite." RSC Advances 9, no. 9 (2019): 4900–4907. http://dx.doi.org/10.1039/c8ra10248a.

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Dang, Long Van, Thu Thi Minh Nguyen, Dang Van Do, Son Thanh Le, Trong Dinh Pham, and Anh Thi Mai Le. "Study on the Synthesis of Chabazite Zeolites via Interzeolite Conversion of Faujasites." Journal of Analytical Methods in Chemistry 2021 (March 29, 2021): 1–10. http://dx.doi.org/10.1155/2021/5554568.

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The interzeolite conversion of faujasite (FAU-type) zeolites to chabazite (CHA-type) zeolite in the presence of N,N,N-trimethyladamantammonium and N,N,N-dimethylethylcyclohexylammonium cations was investigated over a large compositional range by carefully controlling the reaction mixture compositions. Highly crystalline CHA zeolites were also obtained by the transformation of several zeolite types including EMT, LTL, LEV, RTH, and MFI frameworks. The formation of CHA zeolite from FAU zeolite precursors was substantially faster than that from zeolite L with a similar composition. High-silica CH
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Daiji, Kasahara, and Wajima Takaaki. "Material Conversion of Waste Aluminoborosilicate Glass into Faujasite-type Zeolite using Alkali Fusion." International Journal of Engineering Research & Science 4, no. 11 (2018): 30–36. https://doi.org/10.5281/zenodo.1745064.

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<strong><em>Abstract</em></strong><strong>&mdash;</strong><em>A large amount of liquid crystal display (LCD) television becomes popular for the last decades, and the amount of waste LCD panels will increase soon. LCD panels mainly consist of aluminoborosilicate glass, and it is difficult to recycle aluminoborosilicate glass using the same recycling method of soda-lime glass, due to the high strain point. Therefore, a novel recycling method for aluminoborosilicate is desired. In this study, we attempted to convert waste aluminoborosilicate glass powder into faujasite-type zeolite using alkali f
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Kouzoudis, Dimitris, Theodoros Baimpos, and Georgios Samourgkanidis. "A New Method for the Measurement of the Diffusion Coefficient of Adsorbed Vapors in Thin Zeolite Films, Based on Magnetoelastic Sensors." Sensors 20, no. 11 (2020): 3251. http://dx.doi.org/10.3390/s20113251.

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In the current work an experimental method is used in order to calculate the diffusivity D (diffusion coefficient) of various vapors in thin zeolite films. The method is based on adsorption data from magnetoelastic sensors on top of which a zeolite layer was synthesized, and the diffusivity is extracted by fitting the data to Fick’s laws of diffusion. In particular, the method is demonstrated for two volatile organic compound (VOC) vapors on two different zeolites, the p-Xylene adsorption in Faujasite type zeolite with D = 1.89 × 10 − 13 m 2 / s at 120 ° C and the propene adsorption in Linde T
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Dissertations / Theses on the topic "Faujasite-type zeolite"

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Heck, Elizabeth Maria. "Synthesis of Poly(p-phenylene vinylene) within Faujasite and Linde Type A Zeolites: Encapsulation for Improved Optical Properties." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306333964.

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Dima, Eftichia A. "Thermogravimetric studies of gas desporation from faujasite type zeolites." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/37993.

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Abrioux, Cyril. "Modélisation moléculaire de ladsorption et de la diffusion de molécules polaires dans un solide nanoporeux de type zéolithique." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20159/document.

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Les zéolithes sont des matériaux aluminosilicates nanoporeux largement utilisés dans l'industrie pour la filtration de l'eau, la séparation de gaz et le craquage des bruts pétroliers. Leurs propriétés d'adsorption et de catalyse sont reliées à la géométrie de leur réseau poreux d'une part et aux cations qui sont présents à leur surface d'autre part. Dans cette thèse, nous étudions par simulation moléculaire l'adsorption de molécules polaires, i.e. l'eau et le méthanol, dans deux zéolithes sodiques de type Faujasite. L'objectif de ce travail est d'étudier l'effet de la présence de molécules ads
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Mellot-Drazniecks, Caroline. "Caracterisation structurale de l'adsorption des isomeres para- et meta- du xylene dans des zeolithes de type faujasite." Paris 6, 1993. http://www.theses.fr/1993PA066608.

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La separation du para-xylene des isomeres aromatiques en c#8 est realisee industriellement par adsorption sur tamis moleculaire zeolithique. La comprehension des proprietes d'adsorption des zeolithes employees necessite une connaissance precise des interactions entre les molecules d'adsorbat et la structure zeolithique. L'objet de ce travail consiste a caracteriser d'un point de vue structural l'adsorption a l'etat de corps purs des isomeres para- et meta- du xylene dans des zeolithes de type x, et plus particulierement dans la zeolithe bax reconnue pour ses proprietes selectives performantes
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Jaramillo, Eugenio. "Molecular dynamics simulations of cations and hydrofluorocarbons in faujasite-type zeolites." 2001. https://scholarworks.umass.edu/dissertations/AAI3012143.

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We have developed and applied a new force field for the simultaneous movement of cations and hydrofluorocarbons (HFCs) in zeolites, which explicitly distinguishes Si and Al atoms, as well as different types of oxygen in the framework. The aim of the work is to model three interesting phenomena occurring upon adsorption of HFCs in cationic zeolites: the separation of isomers HFC-134 and HFC-134a at low loadings; the preference upon adsorption of the gauche conformer of HFC-134 as opposed to the gas-phase preferred trans conformer; and the cation migration that takes place in Na-Y after the adso
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Book chapters on the topic "Faujasite-type zeolite"

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Ouled Ltaief, Olfa, Nesrine Dammak, and Mourad Benzina. "Fixed Bed Adsorption Dynamics Experimental Study and Modeling of C3H6 Capture into Faujasite Type Zeolite." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_60.

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Krivenko, Pavel, and Volodymyr Kyrychok. "Genesis of Structure and Properties of the Zeolite-Like Cement Matrices of the System Na(K)-Al2O3-SiO2-H2O within a Temperature Range of 20–1200°C." In Advances in Geopolymers Synthesis and Characterization [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97520.

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The chapter deals with a genesis of structure and properties of the zeolite-like cement matrices of the Na(K)-Al2O3-SiO2-H2O system within a temperature range of 20–1200°С. Due to the fact that zeolite-like structures and their characteristics vary within wide ranges, materials with high-performance properties can be obtained through regulation of the structure formation processes. This can be provided by a proper choice of type of an aluminosilicate component, cation of an alkaline component and additives, including Ca-containing ones, and curing conditions. When the cement matrix formation p
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Reyes, Victor Alfredo, Jesus Isaias De Leon Ramirez, Luis Perez-Cabrera, Arturo Estolano-Cobian, Jose Roman Chavez-Mendez, and Vitalii Petranovskii. "Recent Advances in Sonochemistry for the Synthesis and Modification of FeY Zeolite Catalyst." In Advancements in Zeolites and Micro-Meso Porous Hierarchical Materials. IGI Global, 2025. https://doi.org/10.4018/979-8-3373-0320-8.ch010.

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Sonochemistry is recently used to improve the zeolitization process and post-synthetic treatments of potential zeolite-based catalysts. This work explores the use of ultrasound to synthesize a faujasite zeolite with a Y-type structure and the reported interconversions associated with FAU. Reviewing the effects of sono-assisted treatments of Y zeolite for the formation of mesopores and modification with alkaline metals, alkaline earth metals, and metals. Based on this specified literature review, preliminary work was conducted, employing ultrasound irradiation to synthesize a selective catalyst
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Briend, M., and D. Barthomeuf. "CORRELATIONS BETWEEN ACID STRENGTH AND SI ENVIRONMENT IN FAUJASITE TYPE MOLECULAR SIEVES." In Proceedings from the Ninth International Zeolite Conference. Elsevier, 1993. http://dx.doi.org/10.1016/b978-1-4832-8383-8.50075-1.

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BULL, L. M., S. J. HEYES, and A. K. CHEETHAM. "A STUDY OF THE DYNAMICS OF AROMATIC ADSORBATES IN FAUJASITE-TYPE ZEOLITES." In Proceedings from the Ninth International Zeolite Conference. Elsevier, 1993. http://dx.doi.org/10.1016/b978-1-4832-8383-8.50092-1.

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Briend, M., A. Lamy, S. Dzwigaj, and D. Barthomeuf. "Influence of Framework Phosphorus on the Acidic Properties of Faujasite Type Zeolite." In Studies in Surface Science and Catalysis. Elsevier, 1991. http://dx.doi.org/10.1016/s0167-2991(08)61583-9.

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Turnes Palomino, G., B. Bonelli, E. Garrone, M. Rodríguez Delgado, O. V. Manoilova, and C. Otero Areán. "Isomerization of K(CO)+ and K(OC)+ carbonyls formed upon CO adsorption on the faujasite-type K-Y zeolite." In Recent Advances in the Science and Technology of Zeolites and Related Materials Part B, Proceedings of the 14th International Zeolite Conference. Elsevier, 2004. http://dx.doi.org/10.1016/s0167-2991(04)80686-4.

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Henson, N. J., A. K. Cheetham, A. Redondo, S. M. Levine, and J. M. Newsam. "Computer simulations of benzene in faujasite-type zeolites." In Studies in Surface Science and Catalysis. Elsevier, 1994. http://dx.doi.org/10.1016/s0167-2991(08)63766-0.

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Lechert, H., P. Staelin, M. Wrobel, and U. Schimmel. "Nucleation Gels for the Synthesis of Faujasite Type Zeolites." In Studies in Surface Science and Catalysis. Elsevier, 1994. http://dx.doi.org/10.1016/s0167-2991(08)64108-7.

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Lechert, H., W. D. Basler, and K. P. Wittern. "Nuclear Relaxation Studies of Aromats in Faujasite Type Zeolites." In Studies in Surface Science and Catalysis. Elsevier, 1986. http://dx.doi.org/10.1016/s0167-2991(09)60924-1.

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