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Fine chemical zeolith zsm 5 with Different Si Al Ratio

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  • In-situ Synthesis of ZSM-5 with Different Si/Al Ratios

    2019-6-22 · Chinese Chemical Letters Vol. 10, No. 10, pp. 885−888, 1999 885 In-situ Synthesis of ZSM-5 with Different Si/Al Ratios on Honeycomb-shaped Cordierite and their Behavior on NO Decomposition Xue Lei …

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  • The effect of Si/Al ratio of ZSM‐5 zeolite on its ...

    The H‐ZSM‐5 acidity was determined by NH 3 ‐TPD. These results showed that different Si/Al molar ratios have effect on surface acidity of samples. The surface areas of the H‐ZSM‐5 were measured using BET method and the results showed that, decrease in Si/Al ratio, decreased the surface area.

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  • Influence of Si/Al Ratio of ZSM-5 Zeolite on the ...

    2021-3-11 · However, the H-ZSM-5 zeolite with a very large SiO 2 /Al 2 O 3 mole ratio, such as 280, has only limited effects on the properties of upgraded pyrolysis oil. After the use of zeolite, the pyrolysis oils contain some polyaromatic hydrocarbons, the content of which decreased with an increasing SiO 2 /Al 2 O 3 mole ratio …

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  • The effect of hierarchical single-crystal ZSM-5

    2020-7-10 · ZSM-5 zeolites and verify how the Si/Al ratio affects its catalytic performance. Herein, we report the synthesis of hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios (Hier-ZSM-5-x, where x = 50, 100, 150 and 200), in which we use an ordered mesoporous carbon-silica composite as hard template.

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  • HZSM-5 Zeolites with Different SiO2/Al2O3

    2021-3-11 · This article reports the influence of the SiO2/Al2O3 ratio (30, 80, and 280) on HZSM-5 zeolite properties. XRD patterns show a decrease in the XRD peak intensity at low 2θ angles for low SiO2/Al2O3 ratio zeolites. N2 adsorption and desorption isotherms display hysteresis with both micropores and mesopores …

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  • The effect of hierarchical single-crystal ZSM-5

    2020-7-9 · Hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios (Hier-ZSM-5-x, where x = 50, 100, 150 and 200) were synthesized using an ordered mesoporous carbon-silica composite as hard template. Hier-ZSM-5-x exhibits improved mass transport properties, excellent mechanical and hydrothermal …

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  • Difference of ZSM-5 zeolites synthesized with

    2004-9-1 · The sample ZSM-5(ETL) should have the most acid sites because of its smallest Si/Al ratio. The fact is the sample ZSM-5(NT) synthesized by no template had fewer strong acid sites. This means that there are factors other than the Si/Al ratio that lead to different acidity in ZSM-5 samples . Because the samples were …

    Get Price
  • The Pd/Na-ZSM-5 catalysts with different Si/Al

    2020-3-1 · Kolobova et al. studied the effect of ZSM-5 with different Si/Al ratios (Si/Al = 30, 50, 80) supported Ag catalysts on CO oxidation, showing that the Si/Al ratio of ZSM-5 significantly affects the acidity of the support, thereby change the performance of the catalyst. So far as we know, the mechanism of the influence of Si/Al ratio …

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  • Effect of the Si/Al ratio on the performance of ...

    2020-8-12 · The Na-ZSM-5 catalysts (SiO 2 /Al 2 O 3 molar ratio = 20, 35, and 50) were prepared by rapid crystallization method to investigate their performance in butene cracking reaction. The XRD, XRF, NH 3 ...

    Get Price
  • In-situ Synthesis of ZSM-5 with Different Si/Al Ratios

    2019-6-22 · Chinese Chemical Letters Vol. 10, No. 10, pp. 885−888, 1999 885 In-situ Synthesis of ZSM-5 with Different Si/Al Ratios on Honeycomb-shaped Cordierite and their Behavior on NO Decomposition Xue Lei …

    Get Price
  • The effect of Si/Al ratio of ZSM‐5 zeolite on its ...

    The H‐ZSM‐5 acidity was determined by NH 3 ‐TPD. These results showed that different Si/Al molar ratios have effect on surface acidity of samples. The surface areas of the H‐ZSM‐5 were measured using BET method and the results showed that, decrease in Si/Al ratio, decreased the surface area.

    Get Price
  • Influence of Si/Al Ratio of ZSM-5 Zeolite on the ...

    2021-3-11 · However, the H-ZSM-5 zeolite with a very large SiO 2 /Al 2 O 3 mole ratio, such as 280, has only limited effects on the properties of upgraded pyrolysis oil. After the use of zeolite, the pyrolysis oils contain some polyaromatic hydrocarbons, the content of which decreased with an increasing SiO 2 /Al 2 O 3 mole ratio …

    Get Price
  • The effect of hierarchical single-crystal ZSM-5

    2020-7-10 · ZSM-5 zeolites and verify how the Si/Al ratio affects its catalytic performance. Herein, we report the synthesis of hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios (Hier-ZSM-5-x, where x = 50, 100, 150 and 200), in which we use an ordered mesoporous carbon-silica composite as hard template.

    Get Price
  • HZSM-5 Zeolites with Different SiO2/Al2O3

    2021-3-11 · This article reports the influence of the SiO2/Al2O3 ratio (30, 80, and 280) on HZSM-5 zeolite properties. XRD patterns show a decrease in the XRD peak intensity at low 2θ angles for low SiO2/Al2O3 ratio zeolites. N2 adsorption and desorption isotherms display hysteresis with both micropores and mesopores …

    Get Price
  • The effect of hierarchical single-crystal ZSM-5

    2020-7-9 · Hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios (Hier-ZSM-5-x, where x = 50, 100, 150 and 200) were synthesized using an ordered mesoporous carbon-silica composite as hard template. Hier-ZSM-5-x exhibits improved mass transport properties, excellent mechanical and hydrothermal …

    Get Price
  • Difference of ZSM-5 zeolites synthesized with

    2004-9-1 · The sample ZSM-5(ETL) should have the most acid sites because of its smallest Si/Al ratio. The fact is the sample ZSM-5(NT) synthesized by no template had fewer strong acid sites. This means that there are factors other than the Si/Al ratio that lead to different acidity in ZSM-5 samples . Because the samples were …

    Get Price
  • The Pd/Na-ZSM-5 catalysts with different Si/Al

    2020-3-1 · Kolobova et al. studied the effect of ZSM-5 with different Si/Al ratios (Si/Al = 30, 50, 80) supported Ag catalysts on CO oxidation, showing that the Si/Al ratio of ZSM-5 significantly affects the acidity of the support, thereby change the performance of the catalyst. So far as we know, the mechanism of the influence of Si/Al ratio …

    Get Price
  • Effect of the Si/Al ratio on the performance of ...

    2020-8-12 · The Na-ZSM-5 catalysts (SiO 2 /Al 2 O 3 molar ratio = 20, 35, and 50) were prepared by rapid crystallization method to investigate their performance in butene cracking reaction. The XRD, XRF, NH 3 ...

    Get Price
  • In-situ Synthesis of ZSM-5 with Different Si/Al Ratios

    2019-6-22 · Chinese Chemical Letters Vol. 10, No. 10, pp. 885−888, 1999 885 In-situ Synthesis of ZSM-5 with Different Si/Al Ratios on Honeycomb-shaped Cordierite and their Behavior on NO Decomposition Xue Lei …

    Get Price
  • Difference of ZSM-5 zeolites synthesized with

    2004-9-1 · The sample ZSM-5(ETL) should have the most acid sites because of its smallest Si/Al ratio. The fact is the sample ZSM-5(NT) synthesized by no template had fewer strong acid sites. This means that there are factors other than the Si/Al ratio that lead to different acidity in ZSM-5 samples . Because the samples were …

    Get Price
  • The Pd/Na-ZSM-5 catalysts with different Si/Al

    2020-3-1 · Kolobova et al. studied the effect of ZSM-5 with different Si/Al ratios (Si/Al = 30, 50, 80) supported Ag catalysts on CO oxidation, showing that the Si/Al ratio of ZSM-5 significantly affects the acidity of the support, thereby change the performance of the catalyst. So far as we know, the mechanism of the influence of Si/Al ratio …

    Get Price
  • (PDF) Synthesis and Characterization of ZSM-5

    A series of ZSM-5 zeolites with different morphologies and Si/Al ratios,including nanorods,nanospheres,ellipsoid-like,column-like and chess-like,were prepared by regulating the synthetic methods and changing …

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  • Flexibility in zeolites: 29

    ZSM-5 is a synthetic zeolite which contains silica (Si) and alumina (Al) with the ratio of silica greater than the alumina. The catalyst is known as ZSM-5 because it has a pore diameter of 5 Å ...

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  • Synthesis and Characterization of Fe-Substituted

    2006-10-11 · silica ZSM-5 (as silicalite), at 295 K for an intermediate Si/A1 ratio of 198/1 and at < 272 K for ratios < 110/1. The facile transformation between crystal symmetries due to different pretreatments of ZSM-5 has been known for the last several years [31.

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  • Catalytic combustion of isopropanol over

    2021-3-12 · A series of Fe-substituted ZSM-5 zeolite samples with an almost constant Si/(Fe + Al) molar ratio of 50 but varied levels of Fe substitution were synthesized via an in situ seed-induced hydrothermal method in a fluoride medium. Additionally, a hierarchical Fe-substituted sample with high diffusion capability …

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  • Fine Tuning the Diffusion Length in Hierarchical

    Catalytic combustion of isopropanol in the structured fixed-bed reactor was investigated over Co–ZSM-5 zeolite membrane catalysts. Firstly, ZSM-5 zeolite membrane catalysts with different Si/Al ratios were coated onto the surface of stainless steel fibres via secondary growth method and wet lay-up paper-making …

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  • The influencing factors of hydrothermal synthesis

    2019-7-31 · While maintaining the Si/Al ratio in ZSM-5 and the reaction conditions, we maximized the yield of propylene by reducing the apparent diffusion length in ZSM-5 down to ∼7 nm through our controlled templating synthesis process.

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  • Catalysts | Special Issue : Synthesis and

    From the results of the lab scale reaction, we confirmed the optimum Si/Al ratio (14) of H-ZSM-5, reaction temperature (~250 °C), and weight hourly space velocity (WHSV) (<5 h −1) indicating high ethanol conversion and ethylene selectivity. Five types of cylindrical shaped molded catalysts were prepared by changing the type …

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  • Characterization of Zeolite L Nanoclusters |

    2002-5-1 · Synthesis of zeolite L crystals with different shapes. Journal of Porous Materials 2007, 14 (2) , 119-126. DOI: 10.1007/s10934-006-9016-z. Peiqing Zhang, Xinwen Guo, Hongchen Guo, Xiangsheng Wang. Study of the performance of modified nano-scale ZSM-5 zeolite on olefins reduction in FCC gasoline.

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  • Recommended nomenclature for zeolite minerals:

    Read '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' on DeepDyve, the largest online rental service for scholarly research with thousands of academic …

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  • Zeolite Y: synthesis, modification, and properties-

    2014-1-1 · Following this two-step strategy, the Si/Al ratio of DAY steamed at 873 K for 5 hours changed from 5.4 to 10.3, with a twofold increase of the dealumination effect without significant sample amorphization [38]. Significantly higher values of Si/Al ratio (up to 11) have been obtained directly for steaming at 973 K.

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  • Zeolite Y: Synthesis, Modification, and

    The cubic unit cell of all these alumosilicates contains 192 (Si,Al)O4 tetrahedrons. Breck suggested that the change of X to Y modification occurs at a silicon to aluminium ratio of 1.5 [4]. Zeolites with Si/Al values lower and higher than this critical point characterize X and Y composition, respectively.

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  • A Review of the Chemistry, Structure, Properties

    2017-7-5 · Some Si 4+ ions are substituted by Al 3+ ions, resulting in a net negative charge in the tectosilicate framework (Figures 1.2 and 1.3). This charge arises from the difference in formal valency between the (AlO 4) 5-and (SiO 4) 4-tetrahedrons and is normally located on one of the oxygen anions connected to an aluminium …

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  • (PDF) Recommended nomenclature for zeolite

    Recommended nomenclature for zeolite minerals: report of the subcommittee on zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names

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  • Zeolite Y: Synthesis, Modification, and

    Similar topics of scientific paper in Chemical sciences , author of scholarly article — Wolfgang Lutz Preparation and characterization of hierarchical USY by post-treatment 2015 Ke Qiao, Linjiao Wei, Rui Feng, Zifeng Yan, Zhongdong Zhang, et al.

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  • DE60013376T2 - CATALYST WITH HIGH

    DE60013376T2 DE60013376T DE60013376T DE60013376T2 DE 60013376 T2 DE60013376 T2 DE 60013376T2 DE 60013376 T DE60013376 T DE 60013376T DE 60013376 T DE60013376 T DE 60013376T DE 60013376 T2 DE60013376 T2 DE 60013376T2 Authority DE Germany Prior art keywords catalyst zsm alumina …

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  • Literature Reference S - Fischer-Tropsch

    2019-5-18 · Shen, J., 'Development Of Ruthenium/ZSM-5 Catalysts For Fischer-Tropsch Synthesis: A Study Of Carbon Monoxide Behaviour On Ruthenium/ZSM-5 Catalysts (Carbon Monoxide, Ruthenium ZSM-5…

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  • Literature References W-Z - Fischer-Tropsch

    2019-5-18 · Winkler, D. R., 'Fischer-Tropsch-Mitteldruck-Synthese an Eisenkontakten mit Zeolithen ZSM 11, L, Mordenit und Erionit (Fischer-Tropsch-medium pressure synthesis with zeolite ZSM-5, L, mordenite and erionite)', Dissertation RWTH, Aachen, 1990.

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  • Publications - uni-bayreuth.de

    Valentina Rizzotto, Peirong Chen, Gunter Hagen, Ralf Moos, Ulrich Simon: A Gas Sensing Approach to Gain Insight into the Mechanism of DeNOx-SCR over Fe-ZSM-5 Catalysts. In: 17th International Meeting on Chemical Sensors - IMCS 2018.

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  • Combining Fischer-tropsch Synthesis - Scribd

    2020-5-2 · It is strongly dependent on the type of zeolite, Si/Al-ratio, water content, crystals quality and energy of incident electrons (see Chapter 3.2.2.2). Due to the instability of the crystal it was not possible to determine the degree of Pt dispersion. The SEM pictures show that ZSM-5 crystals are larger than those from Beta zeolite (Tab. 5…

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  • 2007 - en.catalysis.ru

    Main Concepts and Formulas of Chemical Kinetics, Novosibirsk, NSU, (2007) 87 pp . Zavarukhin S.G., Mathematic Modelling of Chemical Engineering Processes and Apparatuses, Novosibirsk, NSTU, (2006) 60 pp.

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  • Institutionen der Universität Bayreuth ...

    Monitoring NH3 storage and conversion in Cu-ZSM-5 and Cu-SAPO-34 catalysts for NH3-SCR by simultaneous impedance and DRIFT spectroscopy. Universität Bayreuth Lehrstuhl für Funktionsmaterialien In: Sensors and Actuators B: Chemical. Bd. 236 (2016) . - S. 1075-1082.

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  • Institut de Chimie Physique

    5. Al Cheikh, Joumada; Zakari, Rosa; Bhosale, Amit C ... Gamma-Radiolysis preparation of nanometer-sized cadmium sulphide quantum dots stabilized in nanozeolite X and ZSM-5. New J. Chem. 42 ... TiO2-photocatalytic transformation of Cr(VI) in the presence of EDTA: comparison of different commercial …

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  • Einträge mit Jahr 2012 - ERef Bayreuth

    Nihna nâs al-bahar - we are the people of the river : ethnographic resarch in the fourth Nile Cataract Region, Sudan. - Wiesbaden : Harrassowitz, 2012 . - S. 5-48 .

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  • 724248.pdf | Silicon | Zeolite

    The fine-tuning of the Si/Al ratio in zeolite Y framework is [8] P. B. Venuto and E. T. Habib Jr., Catalyst-feedstock-engineering achieved by a subsequent steam treatment of NH4 NaY sam- interactions in fluid catalytic cracking, Catalysis Reviews: ples at temperatures between 573 K and 973 K in dependence Science and …

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  • Microwave-assisted Inorganic Syntheses - PDF

    MICROWAVE-ASSISTED SYNTHESIS OF [Al]ZSM-5 [Al]ZSM-5 can be synthesized from a reaction mixture having a typical composition of 5.0Na2Oe0.2A2O3e 60SiO2e4.0TPABre900H2O. The very well-crystallized 178 8. MICROWAVE-ASSISTED INORGANIC SYNTHESES [Al]ZSM-5 can be obtained from this gel …

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  • Zeolite Y Synthesis Modification, And purification ...

    2016-5-2 · process. Following this two-step strategy, the Si/Al ratio of DAY steamed at 873 K for 5 hours changed from 5.4 to 10.3, with a twofold increase of the dealumination effect without significant sample amorphization [38]. Significantly higher values of Si/Al ratio (up to 11) have been obtained directly for

    Get Price
  • Development of MFI-type Zeolite Coatings on

    Computers & electronics; Audio & home theatre; Portable DVD/Blu-Ray players; User manual. User manual | Development of MFI-type Zeolite Coatings on SiSiC Ceramic Development of MFI-type Zeolite Coatings on SiSiC Ceramic

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  • Institutionen der Universität Bayreuth ...

    Monitoring NH3 storage and conversion in Cu-ZSM-5 and Cu-SAPO-34 catalysts for NH3-SCR by simultaneous impedance and DRIFT spectroscopy. Universität Bayreuth Lehrstuhl für Funktionsmaterialien In: Sensors and Actuators B: Chemical. Bd. 236 (2016) . - S. 1075-1082.

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  • Traueranzeigen von inFranken.de

    Finden Sie hier Traueranzeigen, Todesanzeigen und Beileidsbekundungen aus Ihrer Tageszeitung oder passende Hilfe im Trauerfall. Jetzt online gedenken.

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  • Archivobjekt öffnen - Katalog der Deutschen

    No category Archivobjekt öffnen - Katalog der Deutschen Nationalbibliothek

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  • Crude Oil Chemistry | Alkane | Petroleum

    2020-12-5 · Typical analysis of a Canadian petroleum from oil wells in McMurray resulted in the following fractions: Gasoline and naphtha - 2.8% Kerosene - 0% Diesel-19.0% Light oil - 4.3% Medium oil-8.5% Heavy oilfraction- 13.2% Vacuum residue - 49.5%. The chemical composition of petroleum can be very different too. …

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  • Forschungsbericht 2015 - Fakultät für Verfahrens

    Forschungsbericht 2015 - Fakultät für Verfahrens Forschungsbericht 2015 Forschungsbericht 2015: Otto-von-Guericke-Universität Magdeburg Otto-von-Guericke-Universität Magdeburg Universitätsplatz 2 D-39106 Magdeburg Telefon: +49 391 67 01; Telefax: +49 391 67 11156 www.uni-magdeburg.de 1.

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  • Einträge mit Jahr 2012 - ERef Bayreuth

    Nihna nâs al-bahar - we are the people of the river : ethnographic resarch in the fourth Nile Cataract Region, Sudan. - Wiesbaden : Harrassowitz, 2012 . - S. 5-48 .

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  • [PDF] Modifizierung und Funktionalisierung

    Erhöht man die Reaktionstemperatur auf 150 oder 200 °C, wird der Zeolith ZSM-5 isoliert.[BVK94] Dieses Ergebnis lässt sich folgendermaßen beschreiben: zur Micellenbildung befähigte, kationische Tenside führen in Kombination mit anionischen, silicatischen Spezies bei relativ niedrigen Temperaturen zur Bildung …

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  • Stationary Phases in Gas Chromatography - PDF

    aL = solute activity in the liquid stationary phase, = solute activity in the gas phase, aM k,h =activity coefficients of the sample in the liquid and gas phases, respectively, this partition coefficient has become a thermodynamic quantity and permits e.g., calculations of heat contents from the temperature dependence of retentions [8].

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