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Artículos de revistas sobre el tema "Silicalita"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 15 de febrero de 2022

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1

Cubillos-Lobo, Jairo Antonio, Felipe Bustamante-Londoño, and Alejandro Acosta-Cárdenas. "Modelación y simulación de un pervaporador acoplado a un proceso de sacarificación-fermentación para la producción de etanol." REVISTA FACULTAD DE INGENIERÍA 24, no. 40 (2015): 49. http://dx.doi.org/10.19053/01211129.3848.

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<p>Actualmente, la integración de procesos es considerada una opción viable para reducir costos en la producción de etanol a partir de biomasa. Simulaciones y resultados experimentales han demostrado los beneficios de la integración de las etapas de sacarificación y fermentación y del acoplamiento del proceso de fermentación a la recuperación in-situ de etanol por pervaporación en la producción de bioetanol; sin embargo, no se han publicado estudios de la integración del proceso de sacarificación-fermentación simultánea con membranas de separación, para la remoción insitu de etanol a par

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2

Prádanos, P., L. Palacio, A. Hernández, M. Vilaseca, J. Coronas, and J. Santamaría. "Estudio mediante afm de estructuras de silicalita para la separación de gases." Boletín de la Sociedad Española de Cerámica y Vidrio 43, no. 1 (2004): 19–22. http://dx.doi.org/10.3989/cyv.2004.v43.i1.608.

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3

Marthosa, Sutida, Wirote Youravong, Chaiwat Kongmanklang, and Watsa Khongnakorn. "Applications and characterization of silicalite-1/polydimethylsiloxane composite membranes for the pervaporation of a model solution and fermentation broth." Journal of Polymer Engineering 39, no. 2 (2019): 152–60. http://dx.doi.org/10.1515/polyeng-2018-0138.

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AbstractEthanol recovery via pervaporation is greatly influenced by membrane separation performance, which can be enhanced by adding hydrophobic fillers such as silicalite-1. Silicalite-1 was prepared by controlling the gel molar composition in hydrothermal synthesis, and it was incorporated into a polydimethylsiloxane (PDMS) membrane on Teflon. The silicalite-1 Si-O-Si structures interacted with the -Si(CH3)2-O- backbone of the PDMS chain. The thermal gravimetric analysis results showed that the silicalite-1 improved the thermal stability and raised the initial decomposition temperature from

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4

Sakai, Motomu, Yukichi Sasaki, Takuya Kaneko, and Masahiko Matsukata. "Contribution of Pore-Connectivity to Permeation Performance of Silicalite-1 Membrane; Part I, Pore Volume and Effective Pore Size." Membranes 11, no. 6 (2021): 382. http://dx.doi.org/10.3390/membranes11060382.

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The micropore volumes and effective pore sizes of two types of silicalite-1 membranes were compared with those of a typical silicalite-1 powder. The silicalite-1 membrane with fewer grain boundaries in the membrane layer showed similar micropore volume and effective pores size to those of the silicalite-1 powder. In contrast, when the silicalite-1 membrane contained many grain boundaries, relatively small micropore volume and effective pore size were observed, suggesting that narrowing and obstruction of the micropore would occur along grain boundaries due to the disconnection of the zeolite p

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5

Lu, Shih-Yuan, Hsiang-Yuan Huang, and Kwen-Hua Wu. "Silicalite/poly(dimethylsiloxane) nanocomposite pervaporation membranes for acetic acid/water separation." Journal of Materials Research 16, no. 11 (2001): 3053–59. http://dx.doi.org/10.1557/jmr.2001.0422.

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Composite separation membranes of poly(dimethylsiloxane) (PDMS) containing well-dispersed silicalite particles of 50 nm were successfully prepared and applied to the preferential pervaporation of acetic acid over water. The nanocomposite membranes showed improvement on both separation factor and permeation flux for the pervaporation process, as compared to plain PDMS membranes and composite membranes containing silicalite particles of 5 μm. The improvement can be attributed to higher readily accessible specific surface area and higher sorption selectivity toward acetic acid of the nano-size si

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6

Chen, Hong Liang, Ji Song Yang, Yan Wang, Hui Ying Li, Xin Xin Li, and Wei Shen Yang. "Preparation of Silicalite-1 Membranes with Seeding Method and its Separation Performance for Low Ethanol/Water Mixture." Advanced Materials Research 807-809 (September 2013): 591–95. http://dx.doi.org/10.4028/www.scientific.net/amr.807-809.591.

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High performance silicalite-1 membranes were successfully synthesized on silica tubes by seeding method after filling the tubes with water and glycerol mixtures. After seeding the silica tubes with 200 nm seeds, all the silicalite-1 membranes show acceptable separation performance towards ethanol/water mixture after 4-12 h hydrothermal synthesis, and the highest flux of membrane with 8 h hydrothermal synthesis reaches about 0.98 kg/m2.h and the separation factor reaches about 60 towards 3 wt.% ethanol/water mixture. This result shows that the as-synthesized silicalite-1 membrane can concentrat

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7

Cheng, Yue, Shun Long Pan, and Yuan Zhou. "Study on Magnetic Mn_0.2Co_0.8Fe₂O₄/Silicalite-2 Catalyst and its Electro-Catalytic Property." Advanced Materials Research 669 (March 2013): 30–33. http://dx.doi.org/10.4028/www.scientific.net/amr.669.30.

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Silicalite-2 zeolite was hydrothermally synthesized and Mn0.2Co0.8Fe2O4 magnetic nano-particle based on the Silicalite-2 zeolite carrier was prepared by a coprecipitation-impregnation method. The morphologies and microstructures of synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM). The heterogeneous catalytic oxidation electrolysis system of Mn0.2Co0.8Fe2O4/silicalite-2 was built by dispersing the catalysts in glass reactor for treating cationic brilliant red X-5GN wastewater. The SEM images showed that the structure of silicalite-2 zeolite r

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8

Chen, Sheng, Guofeng Li, and Qipeng Yuan. "High adsorption capacity by creating a hydrophobic/hydrophilic layer on the surface of silicalite-1." RSC Advances 6, no. 101 (2016): 99509–13. http://dx.doi.org/10.1039/c6ra21257c.

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9

Chen, Hong Liang, Bin Bin Yang, Ji Song Yang, Yan Wang, and Hui Ying Li. "Synthesis of Silicalite-1 Membrane with High-Thermal Stability on Silica Tubes by In Situ Hydrothermal Synthesis." Applied Mechanics and Materials 692 (November 2014): 391–95. http://dx.doi.org/10.4028/www.scientific.net/amm.692.391.

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Silicalite-1 membranes with high-thermal stability were prepared on silica tubes by two-step hydrothermal synthesis after filling the tubes with water and glycerol mixtures. It was found that the filling method can improve the membrane separation performance effectively. After filling the silica tubes with mixed solution, the average flux of silicalite-1 membranes was improved by 23% while keeping the separation selectivity nearly unchanged. The results showed that the silicalite-1 membrane still showed high separation performance towards ethanol/water mixture after the repeated calcination at

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10

Casal, H. L., and J. C. Scaiano. "Intrazeolite photochemistry. II. Evidence for site inhomogeneity from studies of aromatic ketone phosphorescence." Canadian Journal of Chemistry 63, no. 6 (1985): 1308–14. http://dx.doi.org/10.1139/v85-222.

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The luminescent properties of several aromatic ketones included in the hydrophobic zeolite Silicalite have been examined. Acetophenone, benzophenone, and β-phenylpropiophenone show readily detectable phosphorescence; by contrast, valerophenone does not luminesce, but undergoes the Norrish Type II reaction. Thus, irradiated samples of valerophenone in Silicalite show phosphorescence due to the accumulation of acetophenone. In the case of β-phenylpropiophenone the triplet lifetime is ca. 100 000 times longer than the solution value, suggesting severe conformational restrictions. Co-inclusion of

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11

Creci, Simone, Anna Martinelli, Szilvia Vavra, Per-Anders Carlsson, and Magnus Skoglundh. "Acidity as Descriptor for Methanol Desorption in B-, Ga- and Ti-MFI Zeotypes." Catalysts 11, no. 1 (2021): 97. http://dx.doi.org/10.3390/catal11010097.

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The isomorphous substitution of Si with metals other than Al in zeotype frameworks allows for tuning the acidity of the zeotype and, therefore, to tailor the catalyst’s properties as a function of the desired catalytic reaction. In this study, B, Ga, and Ti are incorporated in the MFI framework of silicalite samples and the following series of increasing acidity is observed: Ti-silicalite < B-silicalite < Ga-silicalite. It is also observed that the lower the acidity of the sample, the easier the methanol desorption from the zeotype surface. In the target reaction, namely the direct conve

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12

Doubkova, Martina, Ivana Nemcakova, Ivan Jirka, Vitezslav Brezina, and Lucie Bacakova. "Silicalite-1 Layers as a Biocompatible Nano- and Micro-Structured Coating: An In Vitro Study on MG-63 Cells." Materials 12, no. 21 (2019): 3583. http://dx.doi.org/10.3390/ma12213583.

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Silicalite-1 is a purely siliceous form of zeolite, which does not contain potentially harmful aluminum in its structure as opposed to ZSM-5 aluminosilicate types of zeolite. This paper reports on a study of a silicalite-1 film, deposited on a silicon Si(100) substrate, as a potential anti-corrosive and biocompatible coating for orthopaedic implants. Silicalite-1 film was prepared in situ on the surface of Si(100) wafers using a reaction mixture of tetrapropyl-ammonium hydroxide (TPAOH), tetraethyl-orthosilicate (TEOS), and diH2O. The physico-chemical properties of the obtained surface were ch

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13

Gautam, Siddharth, Tingting Liu, and David Cole. "Sorption, Structure and Dynamics of CO2 and Ethane in Silicalite at High Pressure: A Combined Monte Carlo and Molecular Dynamics Simulation Study." Molecules 24, no. 1 (2018): 99. http://dx.doi.org/10.3390/molecules24010099.

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Silicalite is an important nanoporous material that finds applications in several industries, including gas separation and catalysis. While the sorption, structure, and dynamics of several molecules confined in the pores of silicalite have been reported, most of these studies have been restricted to low pressures. Here we report a comparative study of sorption, structure, and dynamics of CO2 and ethane in silicalite at high pressures (up to 100 bar) using a combination of Monte Carlo (MC) and molecular dynamics (MD) simulations. The behavior of the two fluids is studied in terms of the simulat

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14

Zhao, Jing, Yifu Zhang, Fuping Tian, Yi Zuo, Yang Mu, and Changgong Meng. "High pH promoting the synthesis of V-Silicalite-1 with high vanadium content in the framework and its catalytic performance in selective oxidation of styrene." Dalton Transactions 47, no. 33 (2018): 11375–85. http://dx.doi.org/10.1039/c8dt02042f.

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V-Silicalite-1 with a high vanadium content in the framework was synthesized. OH<sup>−</sup> ions effectively promoted the entry of vanadium atoms into the framework. The V-Silicalite-1 exhibited good catalytic performance.

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15

Deng, Yi-Qiang, Wei-Fang Zhou, Hao-Ming Lv, Ying-Ying Zhang, Chak-Tong Au, and Shuang-Feng Yin. "Synthesis of HZSM-5@silicalite-1 core–shell composite and its catalytic application in the generation of p-xylene by methylation of toluene with methyl bromide." RSC Adv. 4, no. 70 (2014): 37296–301. http://dx.doi.org/10.1039/c4ra04126g.

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A core–shell HZSM-5@silicalite-1 composite was synthesized by overgrowing silicalite-1 on the external surface of HZSM-5, and was characterized by XRD, SEM, TEM, NH<sub>3</sub>-TPD, 1,3,5-triisopropylbenzene (TIPB) cracking and BET methodsdesorption techniques.

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16

Lee, L. Y., S. P. Perera, B. D. Crittenden, and S. T. Kolaczkowski. "Manufacture and Characterisation of Silicalite Monoliths." Adsorption Science & Technology 18, no. 2 (2000): 147–70. http://dx.doi.org/10.1260/0263617001493350.

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Multichannel monoliths containing up to 90% silicalite by weight and with cell densities up to 28 cells/cm2, wall thicknesses down to 0.6 mm and an overall diameter of 40 mm have been prepared from silicalite powder and sodium bentonite (as a binder) by the unit operations of paste preparation, extrusion, drying and firing. The manufactured monoliths, which show good strength, retain the crystal structure and micropore size of the source silicalite powder, and adsorption measurements made by using a dynamic flow system confirm that the monoliths exhibit an equilibrium performance broadly simil

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17

Da Silva, J. P., and L. F. Vieira Ferreira. "A comparative study of the photochemistry of biphenyl adsorbed on cellulose and silicalite." International Journal of Photoenergy 6, no. 4 (2004): 193–98. http://dx.doi.org/10.1155/s1110662x04000248.

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The photochemistry of biphenyl (BP) was studied on two model solid supports, silicalite and cellulose, using time resolved diffuse reflectance techniques and product degradation analysis. The results showed that the photochemical behaviour of BP depends on the solid support. Ground state absorption spectra indicated a near planar configuration in the ground state. BP triplet state was the only species detected on cellulose, while the radical cation(BP•+)was observed in silicalite. BP is relatively stable in both supports. Prolonged irradiations in cellulose lead to the formation of the three m

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18

Yang, Xiaobing, Chuanhai Gan, Huaping Xiong, Liuqing Huang, and Xuetao Luo. "Fabrication and characterization of SiO2@TiO2@silicalite-1 catalyst and its application for degradation of rhodamine B." RSC Advances 6, no. 107 (2016): 105737–43. http://dx.doi.org/10.1039/c6ra23883a.

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SiO<sub>2</sub>@TiO<sub>2</sub>@silicalite-1 catalyst, with TiO<sub>2</sub> (Degussa P25) nanoparticles encapsulated by SiO<sub>2</sub> and adhered on the surface of silicalite-1 zeolite, was successfully fabricated by combining pressing, sintering and infiltration methods.

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19

Sakai, Motomu, Takuya Kaneko, Yukichi Sasaki, Miyuki Sekigawa, and Masahiko Matsukata. "Formation Process of Columnar Grown (101)-Oriented Silicalite-1 Membrane and Its Separation Property for Xylene Isomer." Crystals 10, no. 10 (2020): 949. http://dx.doi.org/10.3390/cryst10100949.

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Silicalite-1 membrane was prepared on an outer surface of a tubular α-alumina support by a secondary growth method. Changes of defect amount and crystallinity during secondary growth were carefully observed. The defect-less well-crystallized silicalite-1 membrane was obtained after 7-days crystallization at 373 K. The silicalite-1 membrane became (h0l)-orientation with increasing membrane thickness, possibly because the orientation was attributable to “evolutionally selection”. The (h0l)-oriented silicalite-1 membrane showed high p-xylene separation performance for a xylene isomer mixture (o-/

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20

Zieliński, Michał, Monika Kot, Mariusz Pietrowski, Robert Wojcieszak, Jolanta Kowalska-Kuś, and Ewa Janiszewska. "Studies of New Iridium Catalysts Supported on Modified Silicalite-1—Their Structure and Hydrogenating Properties." Materials 14, no. 16 (2021): 4465. http://dx.doi.org/10.3390/ma14164465.

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This paper investigates the catalytic properties of the iridium catalysts supported on modified silicalite-1. Post-synthesis modification of silicalite-1, with solutions of ammonium compounds (NH4F and NH4OH), appeared to be an efficient method to generate the acidic sites in starting support. The modification of support led not only to changes in its acidity but also its porosity—formation of additional micro- and mesopores. The novel materials were used as supports for iridium. The iridium catalysts (1 wt.% Ir) were characterized by N2 adsorption/desorption measurements, temperature-programm

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21

Knappe, D. R. U., and A. A. Rossner Campos. "Effectiveness of high-silica zeolites for the adsorption of methyl tertiary-butyl ether from natural water." Water Supply 5, no. 5 (2005): 83–91. http://dx.doi.org/10.2166/ws.2005.0042.

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MTBE adsorption isotherm data were collected for a matrix of high-silica zeolites with different pore sizes (ZSM-5/silicalite, mordenite, beta, Y), exchangeable cations (H+, Na+, NH4+), and hydrophobicities (SiO2/Al2O3 ratios). MTBE adsorption capacities of high-silica zeolites were compared with those of one coconut-shell-based and two coal-based granular activated carbons (GACs) as well as a carbonaceous resin. Isotherm experiments were conducted in ultrapure water buffered at pH 7.2 and in Tar River water (Greenville, NC) to determine the effects of co-adsorbing and preloaded natural organi

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22

Fujiyama, Shinjiro, Shintaro Seino, Natsumi Kamiya, Koji Nishi, and Yoshinobu Yokomori. "Adsorption structure of dimethyl ether on silicalite-1 zeolite determined using single-crystal X-ray diffraction." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 70, no. 5 (2014): 856–63. http://dx.doi.org/10.1107/s2052520614015911.

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The adsorption structures of dimethyl ether (DME) on silicalite-1 zeolite (MFI-type) are determined using single-crystal X-ray diffraction. The structure of low-loaded DME-silicalite-1 indicates that all DME molecules are located in the sinusoidal channel, which is the most stable sorption site based on the van der Waals interaction between DME and the framework. The configuration of guest molecules (linear or bent) plays an important role in determining where the stable sorption site is in the pore system of MFI-type zeolites. Bent molecules favor the sinusoidal channel, while linear molecule

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23

Kamiya, Natsumi, Wataru Iwama, Tomokazu Kudo, et al. "Determining the structure of a benzene7.2-silicalite-1 zeolite using a single-crystal X-ray method." Acta Crystallographica Section B Structural Science 67, no. 6 (2011): 508–15. http://dx.doi.org/10.1107/s0108768111038560.

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A simple method for preparing orthorhombic single crystals of benzene-silicalite-1 was developed. A silicalite-1 crystal was pressed with a weight of 2 g along the +c and −c crystallographic axes while the temperature was increased to 473 K. The temperature was then slowly reduced to 313 K, and these heating and cooling steps were repeated three times. After the orthorhombic single crystals adsorbed benzene, the crystal structure of the resulting benzene-silicalite-1 was determined. There were two kinds of benzene molecules in the asymmetric unit. One was located at the intersection of the str

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24

Куцова, Д. С., Е. В. Богатиков, А. Н. Шебанов та Е. Н. Бормонтов. "Метод повышения эффективности тепловой регенерации сенсора на основе силикалита: молекулярно-динамическое моделирование". Письма в журнал технической физики 45, № 7 (2019): 57. http://dx.doi.org/10.21883/pjtf.2019.07.47541.17642.

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AbstractThe molecular dynamics simulation has been used to find a nonlinear temperature dependence of the sorption/desorption probability coefficients in the methane–silicalite system. A method is proposed for using this nonlinearity to raise the efficiency of methane desorption from the silicalite via oscillatory heating. The results obtained can be used in thermal regeneration of zeolite-based gas-sensitive sensors.

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25

Rhodes, Christopher J., and Timothy C. Dintinger. "Radiolabelling Measurements of Free Radicals Derived from Aromatic Volatile Organic Compounds Adsorbed in Zeolite Nanomaterials to and above Saturation Loadings." Progress in Reaction Kinetics and Mechanism 36, no. 4 (2011): 287–322. http://dx.doi.org/10.3184/146867811x13177993978554.

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Benzene, para-xylene and mesitylene were adsorbed into silicalite, Na - morde- nite, Na - ZSM5 and Li - X zeolites, and studied using the longitudinal field muon spin relaxation (LF-μSRx) technique. The zeolites ZSM5/silicalite and mordenite contain microporous channels while zeolite X has only supercages. For cyclohex- adienyl radicals/benzene adsorbed in Na-ZSM5, silicalite and Na - mordenite, a fraction was detected with a common reorientational activation energy in the region of ca 5kJ mol−1; however, in all cases there appeared a second fraction with an activation energy of ca 12kJmol’. [

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26

Hill, SG, K. Kinson, and D. Seddon. "The Crystal Size and Morphology of Silicalite as Influenced by Gel Nucleation Temperature, Alkalinity and Sodium-Chloride Concentration." Australian Journal of Chemistry 41, no. 5 (1988): 783. http://dx.doi.org/10.1071/ch9880783.

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The influence of sodium chloride, nucleation temperature and alkalinity on crystal size and product morphology of silicalite is described for crystallizations at temperatures of about 170�C. Addition of sodium chloride and increasing alkalinity produce crystals with less intergrowth. Nucleating the gel at 90�C before crystallization significantly reduces crystal size. The intergrowths on the faces of silicalite can be separated and features of the interlocking of separate crystal entities revealed.

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27

Moukahhal, Kassem, Bénédicte Lebeau, Ludovic Josien, et al. "Synthesis of Hierarchical Zeolites with Morphology Control: Plain and Hollow Spherical Beads of Silicalite-1 Nanosheets." Molecules 25, no. 11 (2020): 2563. http://dx.doi.org/10.3390/molecules25112563.

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Binderless pure silica zeolites (zeosils) spheres and hollow spheres with a diameter of 20 µm composed of silicalite-1 nanosheets particles were prepared by pseudomorphic transformation of spherical silica beads using different temperatures (110, 130, and 150 °C) and treatment times (1–5 days) in order to adapt the local dissolution rate of silica to the crystallization rate of silicalite-1 nanosheets allowing to preserve the initial morphology of the silica beads. Fully crystalline beads of 20 µm were obtained at 110 °C for 5 days, whereas hollow spheres similar in size were synthesized at hi

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28

Wang, Haiyan, Wilhelm Schwieger, and Yining Huang. "An investigation of the conformational behavior of a chlorinated hydrocarbon, 1,1,2-trichloroethane, adsorbed in zeolites by Raman spectroscopy." Canadian Journal of Chemistry 93, no. 1 (2015): 118–25. http://dx.doi.org/10.1139/cjc-2014-0187.

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The conformational behavior of 1,1,2-trichloroethane (TCE) adsorbed in two representative zeolites (silicalite-1 and zeolite L) was investigated by Fourier transform (FT)-Raman spectroscopy in combination with thermogravimetric analysis (TGA) and powder X-ray diffraction (XRD). The results indicate that the conformational properties of the TCE molecules inside a zeolitic host are strongly influenced by both the framework topology and the existence of charge balancing cations. When TCE is adsorbed inside completely siliceous silicalite-1, the population of the trans conformer increases signific

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29

Zhao, Wei, Bijay Basnet, Sukyoung Kim, and Ik Jin Kim. "Synthesis of Vertically Aligned Carbon Nanotubes on Silicalite-1 Monolayer-Supported Substrate." Journal of Nanomaterials 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/327398.

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Monodisperse magneticFe3O4nanoparticles (NPs) with the size of ca. 3.5 nm were prepared and used as the catalysts for the synthesis of vertically aligned carbon nanotube (VACNT) arrays. A silicalite-1 microcrystal monolayer was used as the support layer between catalyst NPs and the silicon substrate. Compared to our previous report which used radio-frequency- (rf-) sputteredFe2O3film as the catalyst,Fe3O4NPs that were synthesized by wet chemical method showed an improved catalytic ability with less agglomeration. The silicalite-1 crystal monolayer acted as an effective “buffer” layer to preven

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30

Jung, Sang-Jin. "Preparation Nanosized TPA-Silicalite-1 with Different Silica Sources and Promoters." Applied Chemistry for Engineering 25, no. 3 (2014): 286–91. http://dx.doi.org/10.14478/ace.2014.1029.

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31

Zhao, Wei, Ashish Pokhrel, Hyun Sung Kim, Hyung Tae Kim, and Ik Jin Kim. "Synthesis of Carbon Nanotubes from Silicalite-1-Coated Substrates." Key Engineering Materials 512-515 (June 2012): 275–79. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.275.

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Assembled monolayer of silicalite-1 (AMS) microcrystals on Si wafer for carbon nanotube (CNT) growth has been prepared by the rubbing method. Iron oxide (α-Fe2O3, hematite) catalyst films were deposited onto silicate-1 monolayers from a Fe2O3 target by radio frequency (rf)-sputtering. This approach has the potential for producing well-aligned CNTs with controlled diameter from predesigned silicalite-1 templates by catalytic chemical vapor deposition (CCVD). Silicalite-1 monolayer oriented with faces parallel to Si wafer showed only the planes in the forms {0 k 0} lines at (020), (040), (060),

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32

Sakai, Motomu, Yukichi Sasaki, Takuya Kaneko, and Masahiko Matsukata. "Contribution of Pore-Connectivity to Permeation Performance of Silicalite-1 Membrane; Part II, Diffusivity of C6 Hydrocarbon in Micropore." Membranes 11, no. 6 (2021): 399. http://dx.doi.org/10.3390/membranes11060399.

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This study investigated the permeation behaviors of n-hexane and 2-methylpentane through two-types of silicalite-1 membranes that have different pore-connectivity. The permeation mechanisms of these hydrocarbons were able to be explained by the adsorption–diffusion model. In addition, the fluxes through silicalite-1 membranes could be expressed by the modified Fick’s first law. The hydrocarbon fluxes through S-1S with better pore-connectivity were ca. 3–20 times larger than those through S-1M with poor pore-connectivity. For these membranes with different pore-connectivity, the activation ener

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33

Ueno, Kyohei, Hideyuki Negishi, Takuya Okuno, et al. "Effects of Silica-Particle Coating on a Silica Support for the Fabrication of High-Performance Silicalite-1 Membranes by Gel-Free Steam-Assisted Conversion." Membranes 9, no. 4 (2019): 46. http://dx.doi.org/10.3390/membranes9040046.

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Silicalite-1 membranes with high pervaporation performance were prepared successfully on a silica-particle-coated tubular silica support using a gel-free steam-assisted conversion (SAC) method. The effects of the silica-particle layer formed on the top surface of the silica support and the physical properties of the silica particles themselves on the membrane-formation process were investigated. The silica particles coated served as the additional silica source for growing the silicalite-1 seed crystal layer into the silicalite-1 membrane. As a result, it was possible to form a dense and conti

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34

Petkovic, Sandra, Borivoj Adnadjevic, and Jelena Jovanovic. "Novel kinetics model for adsorption of pollutant from wastewaters onto zeolites. Kinetics of phenol adsorption on zeolite-type silicalite." Adsorption Science & Technology 37, no. 3-4 (2019): 349–64. http://dx.doi.org/10.1177/0263617419833201.

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The kinetics of isothermal adsorption of phenol from an aqueous solution onto the zeolite-type silicalite was investigated. Zeolite-type silicalite was synthesized and its basic physico-chemical properties were determined. Isothermal adsorption kinetics curves of phenol on zeolite-type silicalite were measured at temperature range from 283 to 313 K. By applying Friedman’s differential isoconversional method it was found that the adsorption of phenol on silicalite has one rate determining step. By using the ‘model-fitting’ method it was established that the kinetic of adsorption can be describe

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35

Kim, Hyun Su, Su Kyung Kang, Haoxiang Zhang, Elsa Tsegay Tikue, Jin Hyung Lee, and Pyung Soo Lee. "Al-ZSM-5 Nanocrystal Catalysts Grown from Silicalite-1 Seeds for Methane Conversion." Energies 14, no. 2 (2021): 485. http://dx.doi.org/10.3390/en14020485.

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This study evaluated Al-ZSM-5 nanocrystals grown from silicalite-1 seed crystals as catalysts for the methane dehydroaromatization (MDA) reaction. Silicalite-1 seed crystals sized between 30 and 40 nm were used to grow Al-ZSM-5 under various synthesis conditions. The size of Al-ZSM-5 was significantly affected by the Si/Al ratio (SAR), synthesis time, and silica nutrients/seed crystal ratio (NSR). Larger crystals were obtained with an increased SAR in the synthesis sols. Gradual growth of Al-ZSM-5 occurred with synthesis time, although the growth in crystal size ceased at 5 h of synthesis at 1

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36

Astorino, E., J. B. Peri, R. J. Willey, and G. Busca. "Spectroscopic Characterization of Silicalite-1 and Titanium Silicalite-1." Journal of Catalysis 157, no. 2 (1995): 482–500. http://dx.doi.org/10.1006/jcat.1995.1313.

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37

Zhang, Jianguang, Xiangping Li, Juping Liu, and Chuanbin Wang. "A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance." Catalysts 9, no. 1 (2018): 13. http://dx.doi.org/10.3390/catal9010013.

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In this paper, a comparative study of MFI zeolite derived from different silica sources is presented. Dry gel conversion (DGC) method is used to synthesize silicalite-1 and ZSM-5 with MFI structure. Two kinds of silica sources with different particle sizes are used during the synthesis of MFI zeolite. The as-prepared samples were characterized by X-ray diffraction (XRD), N2-sorption, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and X-ray fluorescence spectrometer (XRF). From the characterization results, it could be seen that the high-quality coffin-like s

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38

Wei, Ning, Jia Zhang, Hexiang Zhong, et al. "Methane Steam Reforming Over NiO/CexZryO2-Sil-1 Catalyst Prepared by In-Situ Self-Assembly." Journal of Nanoscience and Nanotechnology 19, no. 11 (2019): 7416–20. http://dx.doi.org/10.1166/jnn.2019.16620.

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NiO/CexZryO2-Sil-1 catalysts were prepared using an In-Situ self-assembly approach by coupling silicalite-1 and CexZryO2. This one-step synthesis method utilized the high surface area and hydrothermal stability of silicalite-1 and the good oxidation-reduction ability of the CexZryO2, and hence offered high synthesis efficiency. The catalyst structure was examined by N2-physisorption, temperature-programmed reduction, transmission electron microscopy, and X-ray diffraction. All the results showed that silicalite-1 was well-encapsulated by NiO/Ce0.5Zr0.5O2. Furthermore, the effect of the Ce/Zr m

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39

Cruz-Navarro, Dalia Santa, Miguel Torres-Rodríguez, Violeta Mugica-Álvarez, and Mirella Gutiérrez-Arzaluz. "Separation and Capture of CO2 through A Zeolitic Membrane." Proceedings 2, no. 23 (2018): 1436. http://dx.doi.org/10.3390/proceedings2231436.

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This paper presents the development and evaluation of a technology for CO2 separation and capture from a mixture of post-combustion gases through a zeolitic membrane. A silicalite-1 membrane was hydrothermally synthesized to selectively separate CO2 from a CO2/N2 mixture and permeation tests were performed on the mixture and the simple gases. The composition and morphology of the silicalite-1 crystals were confirmed by XRD and SEM/EDS. The recovered CO2 was used as raw material for its transformation into inorganic media like carbonates.

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40

Xu, Guo Liang, Yu Cong, Xin Cheng Wang, et al. "Synthesis of Silicalite-1 Membranes on the Surface of Stainless Steel." Advanced Materials Research 233-235 (May 2011): 1524–28. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1524.

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Silicalite-1 (pure silica MFI) membranes were hydrothermally synthesized on pretreated surface of two common stainless steel materials, i.e., AISI 304 and 316L. XRD and SEM techniques were used to characterize the membranes. Various membrane morphologies can be obtained by adjusting synthesis conditions such as the H2O/SiO2ratio in the start colloid, the crystallization time and temperature as well as the substrate materials. The silicalite-1 membranes on the stainless steel surface show potential applications for regenerative fuel cooling technology in high speed flight field.

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41

Hong, Do-Young, Hyun Su Kim, Haoxiang Zhang, Su Kyung Kang, Elsa Tsegay Tikue, and Pyung Soo Lee. "Si–OH Nest and Al Distribution of Silicalite-1 Core/Al-ZSM-5 Shell Zeolites for Methane Dehydroaromatization Reaction." Crystals 11, no. 6 (2021): 647. http://dx.doi.org/10.3390/cryst11060647.

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Silicalite-1 core/Al-ZSM-5 shell zeolite crystals were prepared in various sizes for use as catalysts in methane dehydroaromatization (MDA), and the growth kinetics and corresponding physicochemical properties of this core–shell zeolite were investigated. Al-ZSM-5 was grown on silicalite-1 seeds at various Si/Al ratios. Core–shell catalysts of all size variations exhibited similar deactivation trends in the MDA reaction, with minor changes in aromatic yields despite clear differences in reaction channel lengths and acid-site properties. This outcome was shown to originate from the unique growt

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42

Zhang, Yanfei, Lanjian Xu, Jie Zhang, et al. "Insight into the dissolution–crystallization strategy towards macro/meso/microporous Silicalite-1 zeolites and their performance in the Beckmann rearrangement of cyclohexanone oxime." Catalysis Science & Technology 8, no. 17 (2018): 4526–36. http://dx.doi.org/10.1039/c8cy00885j.

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43

Sakai, Motomu, Hayata Hori, and Masahiko Matsukata. "Self-defect-healing of silicalite-1 membrane in alkaline aqueous solution with surfactant." Materials Advances 2, no. 12 (2021): 3892–97. http://dx.doi.org/10.1039/d1ma00364j.

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44

Sánchez-Flores, N. A., M. Solache, M. T. Olguín, et al. "Silicalite-1, an adsorbent for 2-, 3-, and 4-chlorophenols." Water Science and Technology 66, no. 2 (2012): 247–53. http://dx.doi.org/10.2166/wst.2012.073.

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The adsorption of the three chlorophenol isomers, ortho, meta and para, by silicalite-1 has been studied at 30 °C, below the solubility (at the same temperature) in water. Large differences, up to 30 times, have been observed between the adsorption of the para- vs. the ortho-isomer. The difference of behavior observed between the isomers is assigned to the tendency to self-organization of the para-isomer. It seems probable that the adsorption sites are at the intersection channels. From a technical point of view, silicalite-1 seems a competitive adsorbent for p-chlorophenol.

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45

Yang, Xiaobing, Liuqing Huang, Jintang Li, Xueyuan Tang, and Xuetao Luo. "Fabrication of SiO2@silicalite-1 and its use as a catalyst support." RSC Advances 7, no. 20 (2017): 12224–30. http://dx.doi.org/10.1039/c6ra28683f.

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46

Dahl, Ivar M., Elisabeth Myhrvold, Åse Slagtern, and Michael Stöcker. "Adsorption of Lower Alcohols from Water Solutions on High Silica Zeolites, Mesoporous MCM-41 and AlPO4-5." Adsorption Science & Technology 15, no. 4 (1997): 289–99. http://dx.doi.org/10.1177/026361749701500404.

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Two dealuminated β-zeolites, zeolite Y and MCM-22 as well as silicalite, MCM-41 and AlPO4-5 have been studied as hydrophobic adsorbents in water solutions. Dealuminated β-zeolite, MCM-22 and silicalite all adsorb alcohols from water solutions. Enhanced adsorption is obtained for alcohols with longer alkyl chains. Adsorption in the practically most interesting 10–80% range of zeolite filling may adequately be described by Langmuir isotherms. The Langmuir adsorption constants are similar for β-zeolite, MCM-22 and silicalite. This indicates that the adsorption is independent of the pore structure

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47

Kelly, Graeme, C. J. Willsher, F. Wilkinson, et al. "Intrazeolite photochemistry. VI. Diffuse reflectance laser flash photolysis and product studies of diphenylmethyl radicals on solid supports." Canadian Journal of Chemistry 68, no. 6 (1990): 812–19. http://dx.doi.org/10.1139/v90-129.

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Diphenylmethyl radicals have been generated by 266 nm laser excitation of 1,1,3,3-tetraphenylacetone adsorbed on silica gel and included in NaX and Silicalite zeolites and have been studied using diffuse reflectance laser flash photolysis techniques. The spectrum for the radical shows λmax at ~335 nm in all three supports and is similar to that in solution. The radicals decay over time scales that vary from hundreds of nanoseconds to minutes and there are indications that some radicals may be decaying on shorter time scales than we can monitor. The efficiency of oxygen quenching increases in g

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48

Choi, Kwang Min, David Raju Burri, Sang Cheol Han, and Sang Eon Park. "Microwave Synthesis and Characterization of Stacked AlTS-1." Solid State Phenomena 119 (January 2007): 167–70. http://dx.doi.org/10.4028/www.scientific.net/ssp.119.167.

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Nano-stacked aluminum titanium silicalite-1(NS-AlTS-1) zeolite with MFI structure was prepared by direct synthesis using a microwave technique and also prepared the conventional aluminum titanium silicalite-1(AlTS-1) by conventional hydrothermal method for comparison. The morphological aspects of these materials were investigated with the help of SEM. The zeolite framework Al location was confirmed by 27Al MAS NMR. The existence of Ti species in the zeolite framework and its co-ordination environment was investigated by UV-Vis spectroscopy. The uni-model distribution of weak acidic sites was e

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49

Maschio, Lorenzo. "Binding is responsible for exceptional hardness in polyethylene/silicalite nanocomposite materials." CrystEngComm 16, no. 44 (2014): 10177–80. http://dx.doi.org/10.1039/c4ce01513d.

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50

Iida, Takayuki, Mitsutaka Sato, Chiya Numako, et al. "Preparation and characterization of Silicalite-1 zeolites with high manganese contents from mechanochemically pretreated reactants." Journal of Materials Chemistry A 3, no. 11 (2015): 6215–22. http://dx.doi.org/10.1039/c4ta06246a.

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