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Journal articles on the topic 'Zeolite *BEA'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 April 2022

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1

Sobuś, Natalia, and Izabela Czekaj. "Comparison of Synthetic and Natural Zeolite Catalysts’ Behavior in the Production of Lactic Acid and Ethyl Lactate from Biomass-Derived Dihydroxyacetone." Catalysts 11, no. 8 (2021): 1006. http://dx.doi.org/10.3390/catal11081006.

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This article presents the results of the conversion of dihydroxyacetone (DHA) to lactic acid (LA) with the use of zeolite catalysts. For this purpose, synthetic zeolite beta (BEA) and natural clinoptilolite (CLI) were used as a matrix. The zeolites were modified with various metals (Sn, Fe, Cu and Zn) during ion exchange under hydrothermal conditions. The DHA conversion process with the participation of metal-functionalized zeolites allowed us to obtain intermediates, i.e., pyruvic aldehyde (PAL), which during the further reaction was transformed into a mixture of products such as ethyl lactat

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2

Soldatkin, О. О., V. M. Arkhypova, І. S. Kucherenko, D. Y. Kucherenko, and S. V. Dzyadevych. "ADAPTATION OF THE PROCEDURE OF CO-IMMOBILIZATION OF ENZYMES WITH DIFFERENT MODIFICATIONS OF ZEOLITES ON THE SURFACE OF CONDUCTOMETRIC TRANSDUCERS." Sensor Electronics and Microsystem Technologies 18, no. 4 (2021): 11–26. http://dx.doi.org/10.18524/1815-7459.2021.4.248177.

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A comparative study of different parameters of conductometric biosensors based on urease and glucose oxidase, co-immobilized with different types of zeolites. Urease immobilized on silicalite-2 was shown to have better performance than immobilized urease without zeolites. Conductometric biosensor with glucose oxidase co-immobilized with zeolite NH4+-Beta 25 had similar response values compared to immobilized enzyme without zeolite. Immobilization of zeolites NH4+-BEA 30 and H+-BEA 30 together with urease leads to an increase in the response of the biosensor, while the reproducibility of the si

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3

Putluru, Siva Sankar Reddy, Leonhard Schill, Anker Degn Jensen, and Rasmus S. N. Fehrmann. "Selective Catalytic Reduction of NOx with NH3 on Cu-, Fe-, and Mn-Zeolites Prepared by Impregnation: Comparison of Activity and Hydrothermal Stability." Journal of Chemistry 2018 (December 10, 2018): 1–11. http://dx.doi.org/10.1155/2018/8614747.

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Cu-, Fe-, and Mn-zeolite (SSZ-13, ZSM-5, and BEA) catalysts have been prepared by incipient wetness impregnation and characterized by N2 physisorption, H2-TPR, NH3-TPD, and XPS methods. Both metal and zeolite support influence the deNOx activity and hydrothermal stability. Cu-zeolites and Mn-zeolites showed medium temperature activity, and Fe zeolites showed high temperature activity. Among all the catalysts, Cu-SSZ-13 and Fe-BEA are the most promising hydrothermally resistant catalysts. Fresh and hydrothermally treated catalysts were further examined to investigate the acidic and redox proper

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4

Pranee, Watcharakorn, Pornsawan Assawasaengrat, Arthit Neramittagapong, Sasitorn Intarachit, and Sutasinee Neramittagapong. "Dimethyl Ether Synthesis via Methanol Dehydration over BEA Zeolite from Bagasse Fly Ash with Zircronium- and Nickel-Ion Exchange." Advanced Materials Research 931-932 (May 2014): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.3.

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The synthesis of dimethyl ether via methanol dehydration has been carried out over Beta zeolite (BEA) and ion-exchanged Beta zeolite from bagasse fly ash using hydrothermal method. The reactions were taken place in a fixed-bed reactor. The effects of nickel and zirconium ion-exchanged of BEA were investigated. Ni-BEA zeolite exhibited high methanol conversion rate and DME-resultant upon the reaction temperature from 200 to 225°C with equilibrium-limiting condition over 225°C; Furthermore, the Ni-BEA zeolite presented the best stable activity at 225°C over 1,200 minute. The Ni-BEA zeolite has a

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5

Awala, Hussein, Elsa Leite, Loïc Saint-Marcel, et al. "Properties of methylene blue in the presence of zeolite nanoparticles." New Journal of Chemistry 40, no. 5 (2016): 4277–84. http://dx.doi.org/10.1039/c5nj02643a.

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6

Zhu, Longfeng, Jian Zhang, Liang Wang, et al. "Solvent-free synthesis of titanosilicate zeolites." Journal of Materials Chemistry A 3, no. 27 (2015): 14093–95. http://dx.doi.org/10.1039/c5ta02680f.

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Titanosilicate zeolites with MFI and *BEA structures are successfully synthesized using raw materials of fumed silica, titanium sulfate, organic templates, and zeolite seeds in the absence of solvents.

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7

Tomlinson, Sean R., Tyler McGown, John R. Schlup, and Jennifer L. Anthony. "Infrared Spectroscopic Characterization of CIT-6 and a Family of *BEA Zeolites." International Journal of Spectroscopy 2013 (October 24, 2013): 1–7. http://dx.doi.org/10.1155/2013/961404.

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Infrared spectroscopy is known to be a useful tool for identifying local structure changes in zeolites. Infrared spectroscopy is often employed to complement X-ray diffraction data. Local structure changes in zeolite CIT-6 and its zeolite beta (*BEA) analogs caused by calcination, altering framework composition, and ion exchange have been identified with mid- and far-infrared spectroscopy. Differences in the local structures of the samples were observed in mid- and far-infrared spectra, including changes in the intratetrahedral asymmetric stretch, the double-ring mode, and the intratetrahedral

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8

Sobuś, Natalia, and Izabela Czekaj. "Catalytic Transformation of Biomass-Derived Glucose by One-Pot Method into Levulinic Acid over Na-BEA Zeolite." Processes 10, no. 2 (2022): 223. http://dx.doi.org/10.3390/pr10020223.

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This article presents the results of the conversion of biomass-based glucose to levulinic acid (LA) with the use of Na-BEA commercial zeolite catalyst. For this purpose, synthetic zeolite BEA was used as a matrix. The glucose conversion process with the participation of Na-BEA zeolite allowed the following acids to be obtained: levulinic acid, lactic acid, pyruvic acid and formic acid. The highest yield of levulinic acid was achieved when processed for 1–5 h at 200–250 °C with 0.1 g and 0.6 g of Na-BEA catalyst. We also compare the one-pot heterogeneous process with similar homogeneous process

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9

Jeong, Sangmin, Ki-Joon Jeon, Young-Kwon Park, Byung-Joo Kim, Kyong-Hwan Chung, and Sang-Chul Jung. "Catalytic Properties of Microporous Zeolite Catalysts in Synthesis of Isosorbide from Sorbitol by Dehydration." Catalysts 10, no. 2 (2020): 148. http://dx.doi.org/10.3390/catal10020148.

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As bisphenol A has been found to cause hormonal disturbances, the natural biomaterial isosorbide is emerging as a substitute. In this study, a method for isosorbide synthesis from sorbitol was proposed by dehydration under high temperature and high pressure reaction. Microporous zeolites and Amberlyst 35 solid acids with various acid strengths and pore characteristics were applied as catalysts. In the synthesis of isosorbide from sorbitol, the acidity of the catalyst was the main factor. MOR and MFI zeolite catalysts with high acid strength and small pore size showed low conversion of sorbitol

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10

Krysiak, Yaşar, Bastian Barton, Bernd Marler, Reinhard B. Neder, and Ute Kolb. "Ab initiostructure determination and quantitative disorder analysis on nanoparticles by electron diffraction tomography." Acta Crystallographica Section A Foundations and Advances 74, no. 2 (2018): 93–101. http://dx.doi.org/10.1107/s2053273317018277.

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Nanoscaled porous materials such as zeolites have attracted substantial attention in industry due to their catalytic activity, and their performance in sorption and separation processes. In order to understand the properties of such materials, current research focuses increasingly on the determination of structural features beyond the averaged crystal structure. Small particle sizes, various types of disorder and intergrown structures render the description of structures at atomic level by standard crystallographic methods difficult. This paper reports the characterization of a strongly disord

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11

Chesnokov, Vladimir V., Pavel P. Dik, and Aleksandra S. Chichkan. "Formic Acid as a Hydrogen Donor for Catalytic Transformations of Tar." Energies 13, no. 17 (2020): 4515. http://dx.doi.org/10.3390/en13174515.

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Specific features of the catalytic tar cracking in the presence of formic acid, BEA zeolite and 8% Ni-2.5% Mo/Sibunit catalyst were studied at 350 °C and 1.0 MPa pressure. The obtained results evidenced that formic acid can be used as a hydrogen donor during catalytic reactions. The formic acid addition made it possible to perform efficient hydrocracking of heavy feed such as tar. It was found that both the tar conversion and selectivity to light (gasoline-diesel) fractions grew in the sequence: tar < (tar - formic acid) < (tar - formic acid - BEA zeolite) < (tar - formic acid - BEA z

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12

Al-Ani, Aqeel, Catia Freitas, and Vladimir Zholobenko. "Hierarchy in zeolite catalysis: The influence of enhanced mesoporosity on the synthesis of renewable fuels and bio-based platform chemicals." Journal of Petroleum Research and Studies 10, no. 4 (2020): 217–32. http://dx.doi.org/10.52716/jprs.v10i4.379.

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Faujasite (FAU), ZSM-5 (MFI), beta (BEA) and mordenite (MOR) zeolites were admitted to a variety of chemical treatments accompanied by surfactant templating strategy, aiming to introduce the intracrystalline mesoporosity effectively. The resulting materials were tested as solid acid catalysts for esterification of the oleic acid as a common model impurities found in bio-oil feedstoks. It was found that the esterification of oleic acid can be enhanced by the presence of strong acid sites in zeolites and their improved accessibility. Overall, mesostructured FAU zeolite demonstrated an improved c

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13

Jonsson, Rasmus, Phuoc Hoang Ho, Aiyong Wang, Magnus Skoglundh, and Louise Olsson. "The Impact of Lanthanum and Zeolite Structure on Hydrocarbon Storage." Catalysts 11, no. 5 (2021): 635. http://dx.doi.org/10.3390/catal11050635.

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Hydrocarbon traps can be used to bridge the temperature gap from the cold start of a vehicle until the exhaust after-treatment catalyst has reached its operating temperature. In this work, we investigate the effect of zeolite structure (ZSM-5, BEA, SSZ-13) and the effect of La addition to H-BEA and H-ZSM-5 on the hydrocarbon storage capacity by temperature-programmed desorption and DRIFT spectroscopy. The results show that the presence of La has a significant effect on the adsorption characteristics of toluene on the BEA-supported La materials. A low loading of La onto zeolite BEA (2% La-BEA)

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14

Bedenko, Stanislav P., Konstantin I. Dement’ev, and Valentin F. Tret’yakov. "Deactivation of Zeolite Catalysts in the Prins Reaction between Propene and Formaldehyde in the Liquid Phase." Catalysts 11, no. 10 (2021): 1181. http://dx.doi.org/10.3390/catal11101181.

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The Prins reaction between propene and formaldehyde was studied over H-BEA, H-FAU, H-MFI and H-MOR zeolites at 150 °C in liquid phase. It was found that the H-BEA sample is the most active and selective toward buta-1,3-diene; the H-MFI is a potential catalyst for 3-buten-1-ol synthesis, while H-FAU can be used for 4-methyl-1,3-dioxane production. It had been confirmed that zeolite textural and acidic properties influence catalyst behaviour: the acidic properties influence sample activity, while product distribution is controlled by pore volume and effective pore diameter. The sample’s deactiva

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15

Jonsson, Rasmus, Jungwon Woo, Magnus Skoglundh, and Louise Olsson. "Zeolite Beta Doped with La, Fe, and Pd as a Hydrocarbon Trap." Catalysts 10, no. 2 (2020): 173. http://dx.doi.org/10.3390/catal10020173.

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Hydrocarbon trapping is a technique of great relevance, since a substantial part of hydrocarbon emissions from engines are released from engines before the catalyst has reached the temperature for efficient conversion of the hydrocarbons. In this work, the influence of doping zeolite beta (BEA) with Fe, Pd, and La on the storage and release of propene and toluene is studied. Five monolith samples were prepared; Fe/BEA, La/BEA, Pd/BEA, Pd/Fe/BEA, and Pd/La/BEA using incipient wetness impregnation, and the corresponding powder samples were used for catalyst characterization by Inductively couple

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16

Villamaina, R., I. Nova, E. Tronconi, T. Maunula, and M. Keenan. "Effect of the NH4NO3 Addition on the Low-T NH3-SCR Performances of Individual and Combined Fe- and Cu-Zeolite Catalysts." Emission Control Science and Technology 5, no. 4 (2019): 290–96. http://dx.doi.org/10.1007/s40825-019-00140-3.

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Abstract We have measured NOx conversions and N2O productions over Fe-BEA and Cu-SAPO catalysts and over their sequential arrangements under Enhanced SCR conditions, resulting from the addition of an aqueous solution of ammonium nitrate (AN) to the typical Standard SCR feed stream, and we have compared them to those observed under Standard and Fast SCR conditions. The expected strong enhancement of the poor low temperature activity of the Fe-BEA catalyst was confirmed: both NH3 and NOx conversions and N2O formations similar to those of the Fast SCR reaction were achieved when cofeeding ammoniu

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17

Hodala, Janardhan L., Anand B. Halgeri, and Ganapati V. Shanbhag. "Enhancement in activity and shape selectivity of zeolite BEA by phosphate treatment for 2-methoxynaphthalene acylation." RSC Advances 6, no. 93 (2016): 90579–86. http://dx.doi.org/10.1039/c6ra16093j.

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Selective and green synthesis of 2-acetyl-6-methoxynaphthalene (2,6MNAC) is studied. Phosphate impregnation in smaller quantity regulates the pore of zeolite BEA. High selectivity to 2,6MNAC over BEA is due to the shape-selective property enhanced by P modification.

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18

Gabla, Jenifer J., Sunil R. Mistry, and Kalpana C. Maheria. "An efficient green protocol for the synthesis of tetra-substituted imidazoles catalyzed by zeolite BEA: effect of surface acidity and polarity of zeolite." Catal. Sci. Technol. 7, no. 21 (2017): 5154–67. http://dx.doi.org/10.1039/c7cy01398a.

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19

Maeno, Zen, Xiaopeng Wu, Shunsaku Yasumura, Takashi Toyao, Yasuharu Kanda, and Ken-ichi Shimizu. "In-Exchanged CHA Zeolites for Selective Dehydrogenation of Ethane: Characterization and Effect of Zeolite Framework Type." Catalysts 10, no. 7 (2020): 807. http://dx.doi.org/10.3390/catal10070807.

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In this study, the characterization of In-exchanged CHA zeolite (In-CHA (SiO2/Al2O3 = 22.3)) was conducted by in-situ X-ray diffraction (XRD) and ammonia temperature-programmed desorption (NH3-TPD). We also prepared other In-exchanged zeolites with different zeolite structures (In-MFI (SiO2/Al2O3 = 22.3), In-MOR (SiO2/Al2O3 = 20), and In-BEA (SiO2/Al2O3 = 25)) and different SiO2/Al2O3 ratios (In-CHA(Al-rich) (SiO2/Al2O3 = 13.7)). Their catalytic activities in nonoxidative ethane dehydrogenation were compared. Among the tested catalysts, In-CHA(Al-rich) provided the highest conversion. From kin

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20

Luo, Yuying, Yadong Zhu, Jianguo Pan, and Xiaohui Chen. "Fast synthesis of hierarchical Al-free Ti-BEA plate-like nanocrystals from low-templated dry gel via a steam-assisted conversion method." Green Chemistry 22, no. 5 (2020): 1681–97. http://dx.doi.org/10.1039/c9gc03869h.

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21

Chang, Chun-Chih, Hong Je Cho, Zhuopeng Wang, Xuanting Wang, and Wei Fan. "Fluoride-free synthesis of a Sn-BEA catalyst by dry gel conversion." Green Chemistry 17, no. 5 (2015): 2943–51. http://dx.doi.org/10.1039/c4gc02457e.

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A Sn-BEA catalyst was synthesized in a fluoride-free medium for the first time via a dry gel conversion method. The use of alkali ions, zeolite BEA seed crystals and ion-exchange before the removal of the organic template has been shown to be indispensable to obtain the desired material.

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22

Li, Yixiao, Quanhua Wang, Ding Wang, and Xiaoliang Yan. "NO-CH4-SCR Over Core-Shell MnH-Zeolite Composites." Applied Sciences 9, no. 9 (2019): 1773. http://dx.doi.org/10.3390/app9091773.

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Selective catalytic reduction of NO with methane (NO-CH4-SCR) in the presence of excess oxygen was investigated over the synthesized MnH-ZZs-n zeolite composite catalysts with FAU (as core) and BEA (as shell) topologies. XRD, SEM, and NH3-TPD technologies were employed to characterize the catalysts. It is found that the topological structure of the zeolite affected the catalytic properties and H2O/SO2 tolerances considerably. MnH-ZZs-n catalysts exhibited much higher NO-CH4-SCR activity than the physical mixture catalysts with comparable relative mass content of Y and Beta zeolites, particular

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23

Williams, C. Luke, Katherine P. Vinter, Chun-Chih Chang, et al. "Kinetic regimes in the tandem reactions of H-BEA catalyzed formation of p-xylene from dimethylfuran." Catalysis Science & Technology 6, no. 1 (2016): 178–87. http://dx.doi.org/10.1039/c5cy01320h.

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24

Ryzhikov, A., I. Khay, H. Nouali, T. J. Daou, and J. Patarin. "Drastic change of the intrusion–extrusion behavior of electrolyte solutions in pure silica *BEA-type zeolite." Phys. Chem. Chem. Phys. 16, no. 33 (2014): 17893–99. http://dx.doi.org/10.1039/c4cp01862a.

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25

Yang, Gang, Xiong Li, and Lijun Zhou. "Adsorption of fructose in Sn-BEA zeolite from periodic density functional calculations." RSC Advances 6, no. 11 (2016): 8838–47. http://dx.doi.org/10.1039/c5ra25554f.

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26

Yakimov, Alexander V., Yury G. Kolyagin, Søren Tolborg, Peter N. R. Vennestrøm, and Irina I. Ivanova. "Accelerated synthesis of Sn-BEA in fluoride media: effect of H2O content in the gel." New Journal of Chemistry 40, no. 5 (2016): 4367–74. http://dx.doi.org/10.1039/c6nj00394j.

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27

Baran, R., L. Valentin, and S. Dzwigaj. "Incorporation of Mn into the vacant T-atom sites of a BEA zeolite as isolated, mononuclear Mn: FTIR, XPS, EPR and DR UV-Vis studies." Physical Chemistry Chemical Physics 18, no. 17 (2016): 12050–57. http://dx.doi.org/10.1039/c6cp01713d.

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A MnSiBEA zeolite has been prepared via a two-step postsynthesis procedure which consisted, in the first step, of the treatment of a tetraethylammonium BEA zeolite with nitric acid for the formation of vacant T-atom sites and then, in the second step, of the incorporation of Mn ions into the framework, resulting in a SiBEA zeolite, through their reaction with the silanol group of the vacant T-atom sites.

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28

Hahn, Christoph, Jürgen Seidel, Florian Mertens, and Sven Kureti. "Study on the kinetics of the adsorption and desorption of NH₃ on Fe/HBEA zeolite." Physical Chemistry Chemical Physics 24, no. 12 (2022): 7493–504. http://dx.doi.org/10.1039/d1cp05378g.

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29

Drzewiecka-Matuszek, Agnieszka, Renata Tokarz-Sobieraj, Małgorzata Witko, and Dorota Rutkowska-Zbik. "Comparison of Catalytic Properties of Vanadium Centers Introduced into BEA Zeolite and Present on (010) V2O5 Surface–DFT Studies." Catalysts 10, no. 9 (2020): 1080. http://dx.doi.org/10.3390/catal10091080.

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Vanadium-based catalysts, in which vanadium is present either as bulk V2O5 or as isolated species, are active in numerous oxidation reactions. In the present study, vanadium speciation and the possibility of its introduction in various forms (V=O, V–OH, V(=O)(–OH)) into the structurally different crystallographic positions in BEA zeolite was considered by means of Density Functional Theory (DFT). Out of nine nonequivalent positions, T2 and T3 positions are the most preferred. The former may accommodate V=O or V–OH, the latter V–OH or V(=O)(–OH). The structural and electronic properties of all

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30

Chang, Chun-Chih, Hong Je Cho, Jingye Yu, et al. "Lewis acid zeolites for tandem Diels–Alder cycloaddition and dehydration of biomass-derived dimethylfuran and ethylene to renewable p-xylene." Green Chemistry 18, no. 5 (2016): 1368–76. http://dx.doi.org/10.1039/c5gc02164b.

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31

Nasser, Galal A., M. H. M. Ahmed, Mochamad A. Firdaus, et al. "Nano BEA zeolite catalysts for the selective catalytic cracking of n-dodecane to light olefins." RSC Advances 11, no. 14 (2021): 7904–12. http://dx.doi.org/10.1039/d0ra07899a.

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32

Ramli, Anita, Siti Eda Eliana Misi, Mas Fatiha Mohamad, and Suzana Yusup. "Hydrogen Production From Steam Gasification of Palm Kernel Shell Using Sequential Impregnation Bimetallic Catalysts." International Journal of Geology 14 (March 19, 2021): 58–62. http://dx.doi.org/10.46300/9105.2020.14.11.

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Zeolite β supported bimetallic Fe and Ni catalysts have been prepared using sequential impregnation method and calcined at temperatures between 500-700 ºC. The catalytic activity of these catalysts in a steam gasification of palm kernel shell was tested in a fixed-bed quartz micro-reactor at 700 ºC. Both Fe and Ni active metals present in FeNi/BEA and NiFe/BEA catalysts are corresponding to Fe2O3 and NiO. Different calcination temperatures and different sequence in metal addition have a significant effect to the catalytic activity where FeNi/BEA (700) shows the highest hydrogen produced than o

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33

Yuvaraj, Shanmugam, and Muthiah Pillai Palanichamy. "Characterization of Chromium-Substituted Zeolite BEA." Bulletin of the Chemical Society of Japan 75, no. 1 (2002): 155–60. http://dx.doi.org/10.1246/bcsj.75.155.

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Lu, Jiaxin, Yaquan Wang, Chao Sun, et al. "Novel synthesis and catalytic performance of hierarchical MOR." New Journal of Chemistry 45, no. 19 (2021): 8629–38. http://dx.doi.org/10.1039/d1nj00133g.

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A novel route was developed to synthesize hierarchical MOR through introduction of BEA/MOR zeolite embryos as structural growth inducer (SGI) in the presence of hexadecyltrimethylammonium (CTA<sup>+</sup>).

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35

Ohata, Yusuke, Takeshi Ohnishi, Takahiko Moteki, and Masaru Ogura. "High NH3-SCR reaction rate with low dependence on O2 partial pressure over Al-rich Cu–*BEA zeolite." RSC Advances 11, no. 17 (2021): 10381–84. http://dx.doi.org/10.1039/d1ra00943e.

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36

Cody, D., M. Moothanchery, E. Mihaylova, V. Toal, S. Mintova, and I. Naydenova. "Compositional Changes for Reduction of Polymerisation-Induced Shrinkage in Holographic Photopolymers." Advances in Materials Science and Engineering 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/8020754.

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Polymerisation-induced shrinkage is one of the main reasons why many photopolymer materials are not used for certain applications including holographic optical elements and holographic data storage. Here, two compositional changes for the reduction of shrinkage in an acrylamide-based photopolymer are reported. A holographic interferometric technique was used to study changes in the dynamics of the shrinkage processes occurring in the modified photopolymer during holographic recording in real time. Firstly, the effect of the replacement of the acrylamide monomer in the photopolymer composition

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37

Velvarská, Romana, Zdeněk Tišler, Veronika Raichlová, and José Miguel Hidalgo-Herrador. "Raman Spectroscopy as Molybdenum and Tungsten Content Analysis Tool for Mesoporous Silica and Beta Zeolite Catalysts." Molecules 25, no. 21 (2020): 4918. http://dx.doi.org/10.3390/molecules25214918.

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Raman spectroscopy was used for the quantitative determination of Mo and W in Mo- and W-supported mesoporous silica (Mo/SBA-15 and W/SBA-15, respectively) and Mo-supported beta zeolite (Mo-BEA). Three Raman quantitative models were developed and optimized for the metal contents of Mo/SBA-15, W/SBA-15, and Mo/BEA. Subsequently, the models were characterized using the root mean square error of calibration (RMSEC), root mean square error of cross-validation (RMSECV), root mean square error of prediction (RMSEP), correlation coefficient, and predicted residual error sum of squares (PRESS) diagnost

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38

Andrade, Marta, Leonardo Ansari, Armando Pombeiro, Ana Carvalho, Angela Martins, and Luísa Martins. "Fe@Hierarchical BEA Zeolite Catalyst for MW-Assisted Alcohol Oxidation Reaction: A Greener Approach." Catalysts 10, no. 9 (2020): 1029. http://dx.doi.org/10.3390/catal10091029.

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The aim of this study was to investigate the catalytic activity of hybrid materials of iron supported on hierarchical zeolites in the oxidation reaction of 1-phenylethanol to acetophenone. A greener approach was considered for the preparation of the catalyst and performance of the oxidation reaction. Hierarchical BEA zeolite samples were obtained from an alkaline and a subsequent acid treatment. The materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and nitrogen adsorption at −196 °C. An iron salt was incorporated onto the hierarchical zeolites by m

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39

Venkatesha, N. J., Y. S. Bhat, and B. S. Jai Prakash. "Dealuminated BEA zeolite for selective synthesis of five-membered cyclic acetal from glycerol under ambient conditions." RSC Advances 6, no. 23 (2016): 18824–33. http://dx.doi.org/10.1039/c6ra01437b.

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BEA zeolite is modified using phenoldisulfonic acid to change catalyst characteristics, which helps to form a single cyclic product. A new term called volume space acidity (VSA) provides volume space available for dioxane to dioxalane rearrangement.

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Bok, Tatiana O., Egor P. Andriako, Elena E. Knyazeva, and Irina I. Ivanova. "Engineering of zeolite BEA crystal size and morphology via seed-directed steam assisted conversion." RSC Advances 10, no. 63 (2020): 38505–14. http://dx.doi.org/10.1039/d0ra07610d.

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Toops, Todd, Andrew Binder, Pranaw Kunal, Eleni Kyriakidou, and Jae-Soon Choi. "Analysis of Ion-Exchanged ZSM-5, BEA, and SSZ-13 Zeolite Trapping Materials under Realistic Exhaust Conditions." Catalysts 11, no. 4 (2021): 449. http://dx.doi.org/10.3390/catal11040449.

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An industry-defined evaluation protocol was used to evaluate the hydrocarbon trapping (HCT) and passive NOx adsorption (PNA) potential for BEA, ZSM-5, and SSZ-13 zeolites with ion-exchanged Pd or Ag. All materials underwent 700 °C degreening prior to exposure to an industry-derived protocol gas stream, which included NOx, ethylene, toluene, and decane as measured trapping species as well as common exhaust gasses CO, H2O, O2, CO2, and H2. Evaluation showed that BEA and ZSM-5 zeolites were effective at trapping hydrocarbons (HCs), as saturation was not achieved after 30 min of exposure. SSZ-13 a

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Paulino, Priscilla N., Rafael F. Perez, Natália G. Figueiredo, and Marco A. Fraga. "Tandem dehydration–transfer hydrogenation reactions of xylose to furfuryl alcohol over zeolite catalysts." Green Chemistry 19, no. 16 (2017): 3759–63. http://dx.doi.org/10.1039/c7gc01288h.

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Milojević-Rakić, M., D. Popadić, A. Janošević Ležaić, et al. "MFI, BEA and FAU zeolite scavenging role in neonicotinoids and radical species elimination." Environmental Science: Processes & Impacts 24, no. 2 (2022): 265–76. http://dx.doi.org/10.1039/d1em00437a.

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Masika, Eric, and Robert Mokaya. "Mesoporous Aluminosilicates from a Zeolite BEA Recipe." Chemistry of Materials 23, no. 9 (2011): 2491–98. http://dx.doi.org/10.1021/cm200706n.

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Chandra Shekara, B. M., B. S. Jai Prakash, and Y. S. Bhat. "Dealumination of Zeolite BEA under Microwave Irradiation." ACS Catalysis 1, no. 3 (2011): 193–99. http://dx.doi.org/10.1021/cs1000448.

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Ramli, Anita, Siti Eda Eliana Misi, Mas Fatiha Mohamad та Suzana Yusup. "Bimetallic Fe-Ni/Zeolite β Catalysts for Hydrogen Generation from Steam Gasification of Palm Kernel Shell". Advanced Materials Research 925 (квітень 2014): 313–17. http://dx.doi.org/10.4028/www.scientific.net/amr.925.313.

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In this study, the potential usage of PKS as a direct source for hydrogen production is being explored in the presence of bimetallic Fe-Ni/Zeolite β (BEA) catalyst. The catalyst was prepared by co-impregnation method and calcined at temperatures between 500-700 oC to study the effect of calcination temperatures on the gas compositions from steam gasification of PKS. The textural properties and crystalline phase present were characterized using BET and X-Ray Diffraction. The catalysts were tested in steam gasification of PKS in a fixed-bed microreactor at 700 oC using 0.3 g catalyst and 0.9 g P

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Ueno, Kyohei, Saki Yamada, Toshinari Watanabe, et al. "Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation." Membranes 9, no. 7 (2019): 86. http://dx.doi.org/10.3390/membranes9070086.

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Hydrophobic pure-silica *BEA-type zeolite membranes with large pores were prepared on tubular silica supports by hydrothermal synthesis using a secondary growth method and were applied to the separation of alcohol/water mixtures by pervaporation (PV), an alternative energy-efficient process for production of biofuels. Amorphous pure-silica tubular silica supports, free of Al atoms, were used for preparing the membranes. In this study, the effects of the synthesis conditions, such as the H2O/SiO2 and NH4F/SiO2 ratios in the synthetic gel, on the membrane formation process and separation perform

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Bregante, Daniel T., Jun Zhi Tan, Andre Sutrisno, and David W. Flaherty. "Heteroatom substituted zeolite FAU with ultralow Al contents for liquid-phase oxidation catalysis." Catalysis Science & Technology 10, no. 3 (2020): 635–47. http://dx.doi.org/10.1039/c9cy01886g.

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Vlasenko, Nina V., Yuri N. Kochkin, German M. Telbiz, Oleksiy V. Shvets, and Peter E. Strizhak. "Insight into the active site nature of zeolite H-BEA for liquid phase etherification of isobutylene with ethanol." RSC Advances 9, no. 62 (2019): 35957–68. http://dx.doi.org/10.1039/c9ra07721a.

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Abdelrahman, Omar A., Katherine P. Vinter, Limin Ren, et al. "Simple quantification of zeolite acid site density by reactive gas chromatography." Catalysis Science & Technology 7, no. 17 (2017): 3831–41. http://dx.doi.org/10.1039/c7cy01068k.

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The Brønsted acid site densities of ZSM-5, BEA and single unit cell self-pillared pentasil (SPP) zeolites of varying Si/Al ratios were measured using a new technique, reactive gas chromatography (RGC), which utilizes alkylamine decomposition to selectively count Brønsted acid sites.

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