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Journal articles on the topic 'Faujasite-type zeolite'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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>—</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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10

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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11

Ramírez, Adriana Medina, Prócoro Gamero Melo, and José Manuel Almanza Robles. "Synthesis of Nanoporous Materials and their Functionalization for Environmental Applications." Materials Science Forum 783-786 (May 2014): 2005–10. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.2005.

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In this work, W, P and faujasite zeolites were synthesized using fly ash as raw material, a waste material derived of coal fired plants in Mexico. Two different synthesis methods were used. Zeolites were submitted a functionalization treatment exchanging their metallic ions by ammonium, aluminum and ferrous ions. Chemical, structural and textural properties of functionalized zeolites were evaluated. As (V) and As (III) adsorption capacity of modified zeolites were assessed. Changes on their structural properties were no significant. While the textural properties such as pore volume, specific s

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12

Sousa, Paulla B. F., Lindiane Bieseki, and Sibele B. C. Pergher. "Seed-Assisted Crystallization in the Hydrothermal Synthesis of FAU Zeolite from Acid-Treated Residue Glass Powder." Materials 18, no. 7 (2025): 1393. https://doi.org/10.3390/ma18071393.

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A simple and low-cost synthesis assisted by seed crystals has been proposed to convert residual colorless glass powder into a Na-X zeolite. For this purpose, the optimal parameters for acid leaching of glass powder were studied to remove impurities that could interfere with the crystallization process. Then, the hydrothermal syntheses were supported by Na-X seed crystals (0% to 5%, wt.) to induce the growth of zeolite X, evaluating the crystallization time (12 h to 48 h) and the variation of the silicon source (acid-treated and untreated residues). The formation of the faujasite as the main ph

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13

Liu, Shang-Bin, Jin-Fu Wu, Long-Ja Ma, May-Whei Lin, and Tun-Li Chen. "NMR Studies of Benzene Adsorbed on Synthetic Faujasite-Type Zeolites." Collection of Czechoslovak Chemical Communications 57, no. 4 (1992): 718–32. http://dx.doi.org/10.1135/cccc19920718.

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The sorption and transport properties of benzene on dehydrated NaX and NaY zeolites have been investigated directly by 1H and 13C NMR measurements of the adsorbed benzene and probed indirectly by 129Xe NMR of the coadsorbed xenon. Dehydrated NaX and NaY zeolite adsorbate samples containing various adsorbate concentrations and having various sample bed configurations, which were subjected to different preparatory and experimental conditions, have been examined. Thermal treatment at a temperature (>250 °C) much greater than the boiling point of bulk benzene (80 °C) for an extended period of s

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14

Trivana, Linda, Sri Sugiarti, and Eti Rohaeti. "SYNTHESIS OF ZEOLITE AND COMPOSITE OF ZEOLITE/TiO2 FROM KAOLIN AND ITS APLICATION TO ADSORPTION-PHOTODEGRADATION OF METHILEN BLUE." ALCHEMY Jurnal Penelitian Kimia 11, no. 2 (2016): 147. http://dx.doi.org/10.20961/alchemy.11.2.722.147-162.

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<p>In this study, zeolite was synthesized from kaolin which was founded from Bangka Belitung as the starting material. Meanwhile, sodium silicate was used as silica source. Zeolite is material with many benefits, such as become an adsorbent. Kaolin has been used as starting material due to high content of silica and alumina, i.e 35 - 50 %. Zeolite was prepared by hydrothermal synthesis process, by mixing the metakaolin which was produced by calcination of kaolin at 700 °C for 6 hours, with sodium silicate and NaOH. The NaOH was used to activate the major components of Si and Al in the ka

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15

Trivana, Linda, Sri Sugiarti, and Eti Rohaeti. "SYNTHESIS OF ZEOLITE AND COMPOSITE OF ZEOLITE/TiO2 FROM KAOLIN AND ITS APLICATION TO ADSORPTION-PHOTODEGRADATION OF METHILEN BLUE." ALCHEMY Jurnal Penelitian Kimia 11, no. 2 (2016): 147. http://dx.doi.org/10.20961/alchemy.v11i2.722.

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<p>In this study, zeolite was synthesized from kaolin which was founded from Bangka Belitung as the starting material. Meanwhile, sodium silicate was used as silica source. Zeolite is material with many benefits, such as become an adsorbent. Kaolin has been used as starting material due to high content of silica and alumina, i.e 35 - 50 %. Zeolite was prepared by hydrothermal synthesis process, by mixing the metakaolin which was produced by calcination of kaolin at 700 °C for 6 hours, with sodium silicate and NaOH. The NaOH was used to activate the major components of Si and Al in the ka

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16

Kabalan, I., B. Lebeau, M. B. Fadlallah, et al. "Hierarchical Faujasite-Type Zeolite for Molecular Decontamination." Journal of Nanoscience and Nanotechnology 16, no. 9 (2016): 9318–22. http://dx.doi.org/10.1166/jnn.2016.12884.

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17

Qin, Zhengxing, Katie A. Cychosz, Georgian Melinte, et al. "Opening the Cages of Faujasite-Type Zeolite." Journal of the American Chemical Society 139, no. 48 (2017): 17273–76. http://dx.doi.org/10.1021/jacs.7b10316.

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18

Minceva, M., and A. E. Rodrigues. "Adsorption of Xylenes on Faujasite-Type Zeolite." Chemical Engineering Research and Design 82, no. 5 (2004): 667–81. http://dx.doi.org/10.1205/026387604323142739.

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19

Liguori, Barbara, Paolo Aprea, Bruno de Gennaro, Fabio Iucolano, Abner Colella, and Domenico Caputo. "Pozzolanic Activity of Zeolites: The Role of Si/Al Ratio." Materials 12, no. 24 (2019): 4231. http://dx.doi.org/10.3390/ma12244231.

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A great challenge of research is the utilization of natural or synthetic zeolites, in place of natural pozzolans, for manufacturing blended cements. The difficulties of interpretation of the pozzolanic behavior of natural zeolite-rich materials and the role played by their nature and composition can be overcome by studying more simple systems, such as pure synthetic zeolites. This study aims at investigating the pozzolanic ability of isostructural zeolites with different framework compositions, such as three sodium zeolites of the faujasite (FAU) framework type: LSX, X, and Y. The pozzolanic a

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20

Ido, H., J. Horii, and K. Yura. "Manufacture of A-type and faujasite-type zeolite membranes." Zeolites 15, no. 4 (1995): 382. http://dx.doi.org/10.1016/0144-2449(95)99132-7.

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21

Firouzjaee, Mahjoobeh Hajitabar, and Majid Taghizadeh. "Synthesis Procedure and Industrial Applications of NaY Zeolite for Various Processes: A Review." Mini-Reviews in Organic Chemistry 17, no. 7 (2020): 795–804. http://dx.doi.org/10.2174/1570193x16666191014164246.

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Faujasite Y zeolites, due to their outstanding properties, have numerous applications in the chemical industries like petroleum refining, adsorption, FCC, petrochemical, aromatic alkylation, natural gas dehydration, separation, and environmental protection. The astonishing properties include high surface area, high porosity, high thermal stability and large ion-exchange capacity. In this review study, a summary of different synthesis techniques of this type of zeolite has been addressed. Different kinds of techniques like seeding, free template, organic template, increasing the alkali treatmen

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22

Ngapa, Yulius Dala, Sri Sugiarti, and Zaenal Abidin. "Hydrothermal Transformation of Natural Zeolite from Ende-NTT and Its Application as Adsorbent of Cationic Dye." Indonesian Journal of Chemistry 16, no. 2 (2018): 138. http://dx.doi.org/10.22146/ijc.21156.

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A synthetic zeolite was produced from natural zeolite from Ende-Nusa Tenggara Timur (NTT) by hydrothermal method. This study aims to produce synthetic zeolite from Ende natural zeolite to remove cation dye through the adsorption process. Temperature of crystal formation (ageing) was performed at 60 °C for 6 h and hydrothermal process was at 100 °C for 24 h. The natural zeolite produced synthetic NaP1 and synthetic Faujasite. Based on the research results, the synthesis of zeolite by the hydrothermal method can enhance the adsorption capacity and Cation Exchange Capacity (CEC). The adsorption c

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23

Mastropietro, T. F., E. Drioli, and T. Poerio. "Low temperature synthesis of nanosized NaY zeolite crystals from organic-free gel by using supported seeds." RSC Adv. 4, no. 42 (2014): 21951–57. http://dx.doi.org/10.1039/c4ra03376k.

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Zeolite crystals having faujasite-type (FAU) topology and particle size distribution in the nanometer range have been successfully prepared by a room temperature, short duration synthesis, in the absence of organic structure directing agents (SDAs).

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24

Mahmoud, Eyas. "Synergistic effect of acidity and extraframework position in faujasite on renewable p -xylene production." Royal Society Open Science 5, no. 5 (2018): 172471. http://dx.doi.org/10.1098/rsos.172471.

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p -Xylene is a commodity chemical used for the manufacture of plastic bottles and textiles. For the biomass-based route from 2,5-dimethylfuran (DMF) and ethylene, the properties of the catalyst such as acidity effect, product selectivity and catalyst activity play an important role. To determine the effect of acidity and extraframework position in faujasite zeolite on p -xylene selectivity, type Y (Si/Al = 40 and Si/Al = 2.55) and X (Si/Al = 1.25) zeolites containing the extraframework Lewis acids Na+, K+, Li+, Ag+ and Cu+, and a Brønsted acid-containing zeolite, HY (Si/Al = 40), were prepared

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25

Ryu, G. U., G. M. Kim, Hammad R. Khalid, and H. K. Lee. "The Effects of Temperature on the Hydrothermal Synthesis of Hydroxyapatite-Zeolite Using Blast Furnace Slag." Materials 12, no. 13 (2019): 2131. http://dx.doi.org/10.3390/ma12132131.

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Blast furnace slag, an industrial by-product, is emerging as a potential raw material to synthesize hydroxyapatite and zeolite. In this study, the effects of temperature on the hydrothermal synthesis of hydroxyapatite-zeolite from blast furnace slag were investigated. Specimens were synthesized at different temperatures (room temperature, 50, 90, 120, or 150 °C). The synthesized specimens were analyzed qualitatively and quantitatively via X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), BET/BJH, and scanning electron microscopy/energy dispersive using X-ray analysis (S

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26

Samara, Fatin, Amer A. Al Abdel Hamid, Venkatesh Gopal, Lara Dronjak, Fares Feghaly, and Sofian Kanan. "Modified Zeolites for the Removal of Emerging Bio-Resistive Pollutants in Water Resources." Catalysts 15, no. 2 (2025): 138. https://doi.org/10.3390/catal15020138.

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The increasing presence of pollutants, including pharmaceuticals and pesticides, in water resources necessitates the development of effective remediation technologies. Zeolites are promising agents for pollutant removal due to their high surface area, ion-exchange capacity, natural abundance, and diverse tailorable porous structures. This review focuses on the efficient application of modified zeolites and mesoporous materials as photocatalysts and adsorbents for removing contaminants from water bodies. The adsorption and photodegradation of pesticides and selected non-steroidal anti-inflammat

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27

Kuterasiński, Łukasz, Marta Sadowska, Paulina Żeliszewska, et al. "Cu-Containing Faujasite-Type Zeolite as an Additive in Eco-Friendly Energetic Materials." Molecules 29, no. 13 (2024): 3184. http://dx.doi.org/10.3390/molecules29133184.

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Regarding the current state of the art on the utilization of zeolites in industry, the application of zeolites as an additive to eco-friendly energetic materials indicates the innovative character of the present research. One of the most commonly used energetic materials in the mining industry (engineering works) is ANFO (ammonium nitrate fuel oil), due to its easy and cheap production procedure as well as its good energetic properties and vast possibilities for modification. In the present research, we investigated Cu-zeolite with a faujasite structure (Cu-FAU) as a modifier of ANFO-based ene

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28

Janiga, Ján. "Investigation of phase purity of faujasite-type Y zeolite." Zeolites 10, no. 1 (1990): 38–43. http://dx.doi.org/10.1016/0144-2449(90)90092-6.

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29

Grass, Jan-Paul, Katharina Klühspies, Bastian Reiprich, Wilhelm Schwieger, and Alexandra Inayat. "Layer-Like Zeolite X as Catalyst in a Knoevenagel Condensation: The Effect of Different Preparation Pathways and Cation Exchange." Catalysts 11, no. 4 (2021): 474. http://dx.doi.org/10.3390/catal11040474.

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This study is dedicated to the comparative investigation of the catalytic activity of layer-like Faujasite-type (FAU) zeolite X obtained from three different synthesis routes (additive-free route, Li2CO3 route, and TPOAC route) in a liquid-phase Knoevenagel condensation of benzaldehyde and ethyl cyanoacetate to ethyl trans-α-cyanocinnamate. It is shown that the charge-balancing cations (Na+ and K+) and the morphological properties have a strong influence on the apparent reaction rate and degree of conversion. The highest initial reaction rate could be found for the layer-like zeolite X synthes

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30

Miessner, Hans, Hendrik Kosslick, Ursula Lohse, Barbara Parlitz, and Vu Anh Tuan. "Characterization of highly dealuminated faujasite-type zeolites: ultrastable zeolite Y and ZSM-20." Journal of Physical Chemistry 97, no. 38 (1993): 9741–48. http://dx.doi.org/10.1021/j100140a034.

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31

Medak, Glorija, Andreas Puškarić, and Josip Bronić. "The Influence of Inserted Metal Ions on Acid Strength of OH Groups in Faujasite." Crystals 13, no. 2 (2023): 332. http://dx.doi.org/10.3390/cryst13020332.

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The number and the strength of acid sites in catalysts have paramount importance on their efficiency. In zeolites chemistry, increased content of framework Al in zeolites gives a higher number of strong acid sites. Their strength can be a disadvantage in catalytic reactions (e.g., methanol to olefins conversion) due to undesired secondary reactions of coke formation. Here, the Faujasite type of zeolite with higher content of Al has been used for investigating the role of defects in structure and inserted (wet impregnation and thermal treatment) metal cations (Mg, Co, Ni, Zn) on the strength of

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32

Al-Jubouri, Sama M. "The static aging effect on the seedless synthesis of different ranges FAU-type zeolite Y at various factors." Iraqi Journal of Chemical and Petroleum Engineering 20, no. 4 (2019): 7–13. http://dx.doi.org/10.31699/ijcpe.2019.4.2.

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This work investigates generating of pure phase Faujasite-type zeolite Y at the ranges chosen for this study via a static aging step in the absence of seeds synthesis. Nano-sized crystals may result when LUDOX AS-40 is used as a silica source for gel composition of range 6 and the crystallization step may be conducted for a period of 4 to 19 hr at 100 ⁰C. Moreover, large-crystals with high crystallinity pure phase Y zeolite can be obtained at hereinabove conditions but when hydrous sodium metasilicate is used as a silica source. The other selected ranges also offer pure phase Y zeolite at the

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33

Coombs, Douglas S., Alberto Alberti, Thomas Armbruster, et al. "Recommended nomenclature for zeolite minerals: report of the subcommittee on zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names." Mineralogical Magazine 62, no. 04 (1998): 533–71. http://dx.doi.org/10.1180/002646198547800.

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Abstract This report embodies recommendations on zeolite nomenclature approved by the International Mineralogical Association Commission on New Minerals and Mineral Names. In a working definition of a zeolite mineral used for this review, interrupted tetrahedral framework structures are accepted where other zeolitic properties prevail, and complete substitution by elements other than Si and Al is allowed. Separate species are recognized in topologically distinctive compositional series in which different extra-framework cations are the most abundant in atomic proportions. To name these, the ap

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34

Zhan, Bi-Zeng, Mary Anne White, James A. Pincock, Katherine N. Robertson, T. Stanley Cameron, and Tsun-Kong Sham. "Oxidation of cyclohexane using a novel RuO2zeolite nanocomposite catalyst." Canadian Journal of Chemistry 81, no. 6 (2003): 764–69. http://dx.doi.org/10.1139/v03-060.

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We report the synthesis, using an organic-template-free hydrothermal crystallization method, and catalysis of a new type of nanocomposite material, 1.3 nm-sized RuO2 particles confined in faujasite zeolite. The zeolite-confined RuO2 composites were fully characterized with X-ray powder diffraction, Ru K-edge X-ray absorption, and high-resolution transmission electron microscopy. XRD and X-ray fluorescence analysis indicate that the framework is faujasite zeolite with a Si:Al ratio of 1.25. Ru K-edge X-ray absorption near-edge structures indicate that the ruthenium species in the zeolite is Ru(

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35

Kuterasiński, Łukasz, Jerzy Podobiński, Dorota Rutkowska-Zbik, and Jerzy Datka. "IR Studies of the Cu Ions in Cu-Faujasites." Molecules 24, no. 23 (2019): 4250. http://dx.doi.org/10.3390/molecules24234250.

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The properties of Cu ions in dealuminated faujasite-type zeolites (Si/Al = 31) containing 1, 2, and 5 wt.% of Cu were investigated by IR spectroscopy with CO and NO as probe molecules. Cu was introduced by impregnation into zeolites in both protonic (HFAU) and sodium (NaFAU) forms of zeolite. Four kinds of Cu species were found: Cu+exch., Cu+oxide, Cu2+exch. (square, planar, and square pyramidal), and Cu2+oxide (CuO). The proportions between these four kinds of Cu depended on the amount of Cu and on the form of zeolite to which Cu was introduced (HFAU or NaFAU). Zeolites with 1 wt.% of Cu intr

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36

A-K Mohammed, Abdul Halim, and Nuha Ali Dahyool. "The Effect of Promoters on the Activity of Prepared Zeolite Catalyst in FCC Process." Iraqi Journal of Chemical and Petroleum Engineering 14, no. 2 (2013): 1–6. http://dx.doi.org/10.31699/ijcpe.2013.2.1.

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Faujasite type NaY zeolite catalyst was prepared from locally available kaolin, then the prepared NaY zeolite have been modified by exchanging of sodium ion with ammonium to produce NH4Y zeolite. NH4Y zeolite was converted to HY zeolite by ion exchanging with oxalic acid. Zinc and nickel promoters have been added to the prepared HY zeolite catalyst, and the effect of these promoters on the catalytic activity of the prepared HY catalyst was studied in fluid catalytic cracking process using light gas oil as a feedstock. The experimental results show that the promoted catalyst gives higher gas oi

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Mojovic, Z., T. Mudrinic, Abu Rabi-Stankovic, et al. "Methanol electrooxidation on PtRu modified zeolite X." Science of Sintering 45, no. 1 (2013): 89–96. http://dx.doi.org/10.2298/sos1301089m.

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Zeolite NaX (faujasite type) was used as a support for platinum-ruthenium catalyst. A procedure for thermal decomposition of noble metal acetylacetonates to deposit noble metal clusters on the surface of solid support was adapted by authors to introduce noble metal clusters in zeolite cavities. The effectiveness of this composite material for methanol electrooxidation from alkaline solution was investigated by cyclic voltammetry. The influence of the concentration of supporting electrolyte, scan rate and rotation rate on the reaction of methanol oxidation was investigated. The obtained activit

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Ferdov, Stanislav, Juliana Marques, Carlos J. Tavares, Zhi Lin, Souhei Mori, and Nao Tsunoji. "UV-light assisted synthesis of high silica faujasite-type zeolite." Microporous and Mesoporous Materials 336 (May 2022): 111858. http://dx.doi.org/10.1016/j.micromeso.2022.111858.

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Giannakopoulos, Ioannis G., and Vladimiros Nikolakis. "Separation of Propylene/Propane Mixtures Using Faujasite-Type Zeolite Membranes." Industrial & Engineering Chemistry Research 44, no. 1 (2005): 226–30. http://dx.doi.org/10.1021/ie049508r.

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Yoshida, Akira, and Kouzou Inoue. "Formation of faujasite-type zeolite from ground Shirasu volcanic glass." Zeolites 6, no. 6 (1986): 467–73. http://dx.doi.org/10.1016/0144-2449(86)90031-x.

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HIKICHI, Yasuo, Ken-iti HUKUO, and Toru MIWA. "Low Temperature Synthesis of Faujasite-Type Zeolite from Cristobalite Rock." Journal of the Ceramic Association, Japan 93, no. 1083 (1985): 717–22. http://dx.doi.org/10.2109/jcersj1950.93.1083_717.

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Mehlhorn, Dirk, Alexandra Inayat, Wilhelm Schwieger, Rustem Valiullin, and Jörg Kärger. "Probing Mass Transfer in Mesoporous Faujasite-Type Zeolite Nanosheet Assemblies." ChemPhysChem 15, no. 8 (2014): 1681–86. http://dx.doi.org/10.1002/cphc.201301133.

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Kusakabe, K., T. Kuroda, K. Uchino, Y. Hasegawa, and S. Morooka. "Gas permeation properties of ion-exchanged faujasite-type zeolite membranes." AIChE Journal 45, no. 6 (1999): 1220–26. http://dx.doi.org/10.1002/aic.690450608.

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Ikeda, Ayumi, Wakako Matsuura, Chie Abe, Sean-Thomas Bourne Lundin, and Yasuhisa Hasegawa. "Evaluation of FAU-type Zeolite Membrane Stability in Transesterification Reaction Conditions." Membranes 13, no. 1 (2023): 68. http://dx.doi.org/10.3390/membranes13010068.

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The transesterification conversion of methyl ether can be enhanced by the removal of the byproduct methanol using methanol permselective faujasite (FAU-type) zeolite membranes. However, the authors previously observed that the methanol flux during the transesterification reaction was lower than the predicted flux. Therefore, this study investigated the stability of FAU-type zeolite membranes in the presence of organic components associated with the transesterification reaction of methyl hexanoate and 1-hexanol. The stability was defined in terms of changes in methanol permeance and zeolite str

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Dekhkanova, Nigora, Eldor Abdurakhmonov, Feruza Rakhmatkarieva, Isabelle Houlbert, and Nodirabegim Jamoliddinova. "Thermodynamics of hydrogen sulfide adsorption in NaX zeolite." E3S Web of Conferences 402 (2023): 14037. http://dx.doi.org/10.1051/e3sconf/202340214037.

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Sulfur-containing organic and inorganic compounds are the main harmful component of natural gas and oil, as well as products of their processing. Since sulfur compounds have acidic properties, their content leads to corrosion of technological parts in production processes. The content of hydrogen sulfide in the transported gas should not exceed 20 mg/m3. In Uzbekistan, motor vehicles run mainly on liquefied natural gas. Sulfur compounds in natural gas corrode gas cylinders, resulting in an explosion. If synthetic zeolites are used in manufacturing processes, as well as in small gas production,

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Iwai, Yasunori, and Toshihiko Yamanishi. "Isotopic Distribution Coefficient of Tritiated Water Adsorbed on Faujasite-Type Zeolite." Fusion Science and Technology 56, no. 1 (2009): 158–62. http://dx.doi.org/10.13182/fst09-a8894.

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Jia, W., and S. Murad. "Molecular dynamics simulations of gas separations using faujasite-type zeolite membranes." Journal of Chemical Physics 120, no. 10 (2004): 4877–85. http://dx.doi.org/10.1063/1.1645771.

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Fernandez-Ruiz, Carlos, Jorge Bedia, Javier Mario Grau, et al. "Promoting Light Hydrocarbons Yield by Catalytic Hydrodechlorination of Residual Chloromethanes Using Palladium Supported on Zeolite Catalysts." Catalysts 10, no. 2 (2020): 199. http://dx.doi.org/10.3390/catal10020199.

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Gas catalytic hydrodechlorination (HDC) of trichloromethane (TCM) and dichloromethane (DCM) was analyzed using Pd (1 wt.%) on different zeolites as catalysts. The aim of this study was to know the surface properties of the catalysts and reaction conditions that promote the yield to light hydrocarbons in this reaction. Five different zeolite supports were used from three commercial zeolites (KL, L-type; NaY, Faujasite; H-MOR, Mordenite). KL and NaY were submitted to ionic exchange treatments in order to increase their acidity and analyze the effect of the acidity in the activity and selectivity

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Ji, X. D., Y. Y. Ma, S. H. Peng, Y. Y. Gong, and F. Zhang. "Simultaneous removal of aqueous Zn2+, Cu2+, Cd2+, and Pb2+ by zeolites synthesized from low-calcium and high-calcium fly ash." Water Science and Technology 76, no. 8 (2017): 2106–19. http://dx.doi.org/10.2166/wst.2017.361.

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In this study, zeolites were synthesized from low-calcium (LCZ) and high-calcium (HCZ) fly ash, respectively. Subsequently, the zeolites were tested for their removal effectiveness for four aqueous cations, namely, Zn2+, Cu2+, Cd2+, and Pb2+, as a function of contact time, pH value, adsorbent dosage, and initial concentration of heavy metals. Both zeolites were characterized by X-ray diffraction, X-ray fluorescence spectrometry, scanning electron microscopy, specific surface area, and cation exchange capacity. The results show that HCZ mainly consists of an unnamed zeolite (Na6[AlSiO4]6·4H2O),

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Barbosa, Antonielly Santos, Antusia Santos Barbosa, and Meiry Gláucia Freire Rodrigues. "Y-Type Zeolite Membranes: Synthesis by Secondary by Method and Application in Treatment of Oily Effluents." Materials Science Forum 958 (June 2019): 23–28. http://dx.doi.org/10.4028/www.scientific.net/msf.958.23.

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Several zeolite membrane types, including Mordenite (MOR), Linde Type A (LTA), and Faujasite (FAU), have been developed. Among these membranes, FAU zeolite membranes have a variety of applications, especially in the separation of mixtures that contain large molecules. The goal of this study is to use zeolite membranes (Y/alumina) to separate suspensions of oil-in-water emulsion. Two ceramic supports were prepared from the alumina at different sintering temperatures (700°C and 1200°C) to obtain gamma-alumina and alpha-alumina, respectively. The materials prepared, zeolite Y membranes/alpha-alum

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