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1,104 Newest Publications about the topic zeolites

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Theoretical Study of the CO2 Hydrogenation into Formic Acid on Lewis Acidic Zeolites

03-Jul-2018 | Worawaran Thongnuam; Thana Maihom; Saowapak Choomwattana; Yuwanda Injongkol; Bundet Boekfa; Piti Treesukul; Jumr ..., Physical Chemistry Chemical Physics, 2018

Conversion of carbon dioxide (CO2) to more valuable chemicals has nowadays received the increasing attention from an environmental and industrial point of view. Herein, we computationally investigate the CO2 hydrogenation to formic acid on Lewis acidic zeolites by means of the density functional ...

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Increasing the ion-exchange capacity of MFI zeolites by introducing Zn to the aluminosilicate frameworks

03-Jul-2018 | Natsume Koike; Kenta Iyoki; Bangda Wang; Yutaka Yanaba; Shanmugam P. Elangovan; Keiji Itabashi; Watcharop Chaikitt ..., Dalton Transactions, 2018

MFI Zeolites exchanged with various cations have gained a great deal of attention as catalysts. Increase in the ion-exchange capacity of zeolites can improve their catalytic properties by introducing more active sites; however, the ion-exchange capacity of MFI zeolites is limited by maximum ...

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Effect of thermal treatment on the photocatalytic behavior of TiO2 supported on zeolites

12-Jun-2018 | Kiros Guesh; Alvaro Mayoral; Yonas Chebude; M.J. Lopez-Muñoz; Carlos Marquez-Alvarez; Isabel Diaz, New Journal of Chemistry, 2018

Photocatalysts based on TiO2 supported on two different synthetic zeolites (Faujasite CBV 760: SiO2/Al2O3 = 60 and Mordenite CBV 21A, SiO2/Al2O3 = 20), containing 10 wt % and 40 wt % TiO2 loading, have been synthesized using a sol-gel method without any further calcination. The structural, ...

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Graphene oxide-assisted synthesis of core-shell structured ZSM-5 zeolites and their catalyst texture effect on the catalytic performance in the acid-catalyzed o-methylation of cyclohexanone with methanol

12-Jun-2018 | Xiao-Hui Kang; Ya-Nan Liu; Hai-Tao Wang; Shao-Wei Bian, CrystEngComm, 2018

Tailoring the crystallization process to realize targeted material texture/porosity is a major challenge in zeolite synthesis, which facilitates the practical application of zeolites. In the present work, core-shell structured ZSM-5 zeolites were successfully synthesized through a graphene oxide ...

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Conversion of methanol to propylene over hierarchical HZSM-5: the effect of Al spatial distribution

01-Jun-2018 | Jianwen Li; Hongfang Ma; Yan Chen; Zhiqiang Xu; Chunzhong Li; Weiyong Ying, Chemical Communication, 2018

Different silicon sources caused diverse Al spatial distribution in HZSM-5, and this affected the hierarchical structures and catalytic performance of desilicated zeolites. After being treated with 0.1 M NaOH, HZSM-5 zeolites synthesized with silica sol exhibited relatively widely distributed ...

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Conversion of methanol to propylene over hierarchical HZSM-5: the effect of Al spatial distribution

01-Jun-2018 | Jianwen Li; Hongfang Ma; Yan Chen; Zhiqiang Xu; Chunzhong Li; Weiyong Ying, Chemical Communication, 2018

Different silicon sources caused diverse Al spatial distribution in HZSM-5, and this affected the hierarchical structures and catalytic performance of desilicated zeolites. After being treated with 0.1 M NaOH, HZSM-5 zeolites synthesized with silica sol exhibited relatively widely distributed ...

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[gamma]-radiolysis preparation of nanometer-sized cadmium sulphide quantum dots stabilized in nanozeolite X and ZSM-5

30-May-2018 | Vincent De Waele; Abdelhafid Souici; Ka-Lun Wong; Svetlana Mintova; Mehran Mostafavi, New Journal of Chemistry, 2018

The radiolytic preparation of CdS nanoparticles stabilized in colloidal zeolites is presented. Nanosized zeolites with different structural frameworks, i.e. FAU and MFI, are used as host materials for the stabilization of different amounts of Cd2+. The colloidal zeolites are stabilized in ethanol ...

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A DFT study of RuO4 interaction with porous materials: Metal-Organic Framework (MOF) and zeolites

29-May-2018 | Siwar Chibani; Michael Badawi; Thierry Loiseau; Christophe Volkringer; Laurent Cantrel; Jean-François Paul, Physical Chemistry Chemical Physics, 2018

Radioactive gaseous ruthenium tetroxide (RuO4) can be released into the environment in the case of a severe nuclear accident. Using periodic dispersion corrected density functional theory calculations, we have investigated for the first time the adsorption behavior of RuO4 into prototypical ...

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Synthesis of hierarchical ZSM-48 nano-zeolites

28-May-2018 | Amir Astafan; Mohammed Amine Benghalem; Laure Michelin; Severinne Rigolet; Joël Patarin; Ludovic Pinard; T. Jea ..., New Journal of Chemistry, 2018

Hierarchical zeolites are known to offer fast mass transfer along with size and shape selectivity compared to their conventional micron-sized zeolite counterparts. We report here the successful synthesis and characterization of a hierarchical ZSM-48 zeolite (*MRE-type structure) using a specific ...

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Reducing possible combinations of Wyckoff positions for zeolite structure prediction

26-May-2018 | Jiaze Wang; Yuzhi Xuan; Yue Ming; Yi Li, Faraday Discussions, 2018

Zeolites are an important class of tetrahedrally coordinated inorganic materials that have been widely used in many chemical industries as catalysts, adsorbents, and ion-exchangers. To date, over 200 types of zeolite frameworks have been discovered. Predicting not-yet-discovered zeolite ...

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