نتایج جستجو برای: modified zsm 5

تعداد نتایج: 1435605  

Journal: :Applied sciences 2022

Herein, a series of Co-Fe mixed oxide modified ZSM-5 adsorbents were synthesized using the ultrasonic-assisted impregnation method for capture elemental mercury. In comparison with other samples, Co4Fe1-ZSM-5 produced relatively better performance, removal efficiency around 96.6% Hg0 and adsorption capacity 901.63 ug/mg achieved at 120 °C. The interaction between CoOx FeOx improved reducibility...

2017
Eva M Gallego Cecilia Paris M Rocío Díaz-Rey Marta E Martínez-Armero Joaquín Martínez-Triguero Cristina Martínez Manuel Moliner Avelino Corma

The synthesis of the ZSM-5 and beta zeolites in their nanosized form has been achieved by using simple alkyl-substituted mono-cationic cyclic ammonium cations as OSDA molecules. The particular combination of a cyclic fragment and a short linear alkyl-chain group (preferentially C4) within the monocationic OSDA molecules allows directing the crystallization of nanosized zeolites with excellent s...

2016
Haibo Zhu Edy Abou-Hamad Yin Chen Youssef Saih Akshaya Kumar Samal Weibing Liu Marie Basset

A new kind of organosilane (1,6-bis (diethyl(3-trimethoxysilylpropyl)ammonium) hexane bromide) with a geminitype structure was prepared and used as a mesoporogen for the synthesis of hierarchical porous ZSM-5 zeolite. There are two quaternary ammonium centers along with double hydrolysable -RSi(OMe)3 fragments in the organosilane, which results in a strong interaction between this mesoporogen a...

Journal: :Chemical communications 2014
Daniel Fodor Lucie Pacosová Frank Krumeich Jeroen A van Bokhoven

We report a method to synthesize hollow ZSM-5 single crystals of a size below 100 nm that could function as nanoreactors with access through the zeolite micropores only. In the first step, ZSM-5 is synthesized with the respective crystal size. In the second, the zeolite is base leached and acid washed under mild conditions.

Journal: :Acta Crystallographica Section B Structural Science 2005

2008
Indranil Roy Choudhury Joris W. Thybaut Johan A. Martens Joeri F.M. Denayer Guy B. Marin

The shape selective catalysis based on ZSM-5 zeolite has found widespread application (1,2) in refining and petrochemical industry since long time. The product distribution associated with hydrocracking and hydroisomerization processes on ZSM-5 are predominantly controlled by the pore geometry and component diffusion. The various aspects of diffusion inside ZSM-5 pore structure have been widely...

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