نتایج جستجو برای: xylene zeolite without nanoparticles coating 873537 621325 302184 3215339 188339 zeolite with zero

تعداد نتایج: 9455686  

2005
Hiromitsu Takaba Atsushi Yamamoto Kikuko Hayamizu Shin-ichi Nakao

1. Introduction 1. Introduction Information on mass transport in polycrystalline zeolite membranes is necessary for a theoretical estimation of the membrane performances. Zeolite membranes are usually prepared as thin layer of an assembly of small zeolite crystals including many intercrystalline regions. Thus, the intercrystal region would influence their individual diffusion properties, which ...

2011
Kunihiro Takahashi

Based on recently published papers, this article introduces the characteristics, hydrogen storage capacity, and economic advantages of the adsorptive carbon system, zeolite, and glass microspheres as possible methods of hydrogen storage. The adsorbents for hydrogen storage now available on the market are activated carbon and zeolite. In terms of hydrogen adsorption, zeolite can adsorb 1 wt perc...

Journal: :Journal of the American Chemical Society 2004
Trong-On Do Andrei Nossov Marie-Anne Springuel-Huet Celine Schneider Jeremy L Bretherton Colin A Fyfe Serge Kaliaguine

Ultrahigh-field 27Al MAS and MQMAS NMR and 129Xe NMR were used to characterize the zeolite-coated SBA-15 materials. This study shows evidence that zeolite nanoclusters are coated on the mesopore surface of SBA-15. These techniques are useful for the detection of zeolite nanoclusters and different aluminum environments in zeolite/aluminosilicate composites, which are difficult or even impossible...

Journal: :Science 2017
H Jesse Smith

Start with the transition state Zeolites catalyze a wide range of industrial reactions, but identifying the reactions that they catalyze well tends to be done by trial and error. Gallego et al. propose a way to rationalize the process by using structure-directing agents that act as scaffolds for creating the zeolite pores and channels (see the Perspective by Millini). They picked molecules that...

Journal: :Industrial & Engineering Chemistry Research 2022

Hierarchical faujasite zeolites made up of nanoparticle aggregates (NAs) and layer-like structures (LL) are evaluated for xylene adsorption in both gas liquid phases. For NA zeolites, several samples with varying external surfaces meso/macropore volumes considered. Compared to conventional faujasite, isotherms as measured by means thermogravimetric experiments display higher capacities the fauj...

2013
Enrique Lima Roberto Guerra Víctor Lara Ariel Guzmán

UNLABELLED BACKGROUND It is imperative to eliminate bacteria present in water in order to avoid problems in healthy. Escherichia coli and Salmonella typhi bacteria are two common pollutants and they are developing resistance to some of the most used bactericide. Therefore new biocide materials are being tested. Thus, gold nanoparticles are proposed to inhibit the growth of these two microorg...

2012
Youn - Ku Nam Tak - Hyun Kim Myunjoo Lee

The ionizing radiation of livestock wastewater for the removal of nitrogen and phosphorus was studied in the presence of a natural zeolite. The feasibility of a combined process of zeolite ion exchange and electron beam irradiation of livestock wastewater was also investigated. The removal efficiencies of NH4-N, T-N and T-P were significantly enhanced by electron beam irradiation after zeolite ...

2003
A. M. Doyle G. Rupprechter

A procedure has been developed to prepare ultra-thin zeolite films supported on Si(1 0 0). Films were prepared by spin-coating a solution of Silicalite-1 zeolite precursors diluted in ethanol, followed by hydration in water vapour and heating to 60 C. High resolution transmission electron microscopy analysis of sample cross-sections shows that the surfaces are both smooth and continuous, and fi...

Journal: :Chemical communications 2013
Shiwen Li Laurence Burel Cindy Aquino Alain Tuel Franck Morfin Jean-Luc Rousset David Farrusseng

We report an original and scalable synthesis pathway to produce encapsulated gold nanoparticles. Precise control of the gold particles is achieved in the range of 1-10 nm through the impregnation of silicalite-1 with a controlled concentration of gold solution, followed by dissolution-recrystallization of the zeolite.

2015
Ivan Kucherenko Oleksandr Soldatkin Berna Ozansoy Kasap Salih Kaan Kirdeciler Burcu Akata Kurc Nicole Jaffrezic-Renault Alexei Soldatkin Florence Lagarde Sergei Dzyadevych

In this work, the method of enzyme adsorption on different zeolites and mesoporous silica spheres (MSS) was investigated for the creation of conductometric biosensors. The conductometric transducers consisted of gold interdigitated electrodes were placed on the ceramic support. The transducers were modified with zeolites and MSS, and then the enzymes were adsorbed on the transducer surface. Dif...

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