Free template synthesis of novel hybrid MFI/BEA zeolite structure used in the conversion of methanol to clean gasoline: Effect of Beta zeolite content

The synthesis of dimethyl ether via methanol dehydration has been carried out over Beta zeolite (BEA) and ion-exchanged Beta zeolite from bagasse fly ash using hydrothermal method. The reactions were taken place in a fixed-bed reactor. The effects of nickel and zirconium ion-exchanged of BEA were investigated. Ni-BEA zeolite exhibited high methanol conversion rate and DME-resultant upon the reaction temperature from 200 to 225°C with equilibrium-limiting condition over 225°C; Furthermore, the Ni-BEA zeolite presented the best stable activity at 225°C over 1,200 minute. The Ni-BEA zeolite has also been interesting as a zeolite which suited to be one role importance to improve the properties for methanol dehydration to dimethyl ether.

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Incorporation of clusters of titanium oxide in Beta zeolite structure by a new cold TiCl4-plasma process: physicochemical properties and photocatalytic activity

Physical Chemistry Chemical Physics ◽

10.1039/c3cp52478g ◽

2013 ◽

Vol 15 (38) ◽

pp. 16198 ◽

Cited By ~ 16

Author(s):

Mohamad El-Roz ◽

Louwanda Lakiss ◽

Jaafar El Fallah ◽

Oleg I. Lebedev ◽

Frederic Thibault-Starzyk ◽

...

Keyword(s):

Photocatalytic Activity ◽

Physicochemical Properties ◽

Titanium Oxide ◽

Beta Zeolite ◽

Plasma Process ◽

Zeolite Structure

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Rapid, Non-Toxic Synthesis of Beta Zeolites

10.26434/chemrxiv.6432155 ◽

2018 ◽

Author(s):

Felix Hemmann ◽

Jonathan Hackebeil ◽

Andreas Lißner ◽

Florian Mertens

Keyword(s):

Hydrofluoric Acid ◽

Molecular Sieves ◽

Toxic Chemicals ◽

Lewis Acidity ◽

Beta Zeolite ◽

Seeded Growth ◽

Related Research ◽

Beta Zeolites ◽

Growth Method ◽

Fast Synthesis

Molecular sieves with beta zeolite topology are promising catalysts for various reactions as they exhibits extraordinary Lewis acidity. However, their industrial application and related research in academica is hindered because their synthesis is time consuming and typically involves toxic chemicals as hydrofluoric acid. Therefore, tetraethylammonium fluorid was tested as a non-toxic fluotide source for the synthesis of beta zeolites. In combination with the previously reported nano-seeded growth method, a fast synthesis of beta zeolites only involving non-toxic chemicals was possible. Synthesized zeolites show comparable selectivity in the Bayer-Villinger oxidation as conventional zeolites synthesized with hydrofluoric acid.<br>

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Faculty Opinions recommendation of [Principle of marginotomy in template synthesis of polynucleotides].

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.717968476.15528075 ◽

2012 ◽

Author(s):

Neal Young

Keyword(s):

Template Synthesis

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Cyclohexylation of Naphthalene Over USY Zeolites

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19990138 ◽

1999 ◽

Vol 64 (1) ◽

pp. 138-148 ◽

Cited By ~ 1

Author(s):

Miroslav Michvocík ◽

Dušan Mravec ◽

Milan Hronec ◽

Agáta Smiešková ◽

Pavol Hudec

Keyword(s):

Liquid Phase ◽

Hydrochloric Acid ◽

Thermal Stabilization ◽

Y Zeolite ◽

Zeolite Structure ◽

Positive Effect

The influence of thermal stabilization of NH4-Y zeolite and modification of USY zeolites with solutions of hydrochloric acid on the cyclohexylation of naphthalene in the liquid phase was studied. Removal of the part of extra-framework aluminium from zeolite structure has a positive effect on both conversion of naphthalene and amount of dicyclohexylnaphthalenes formed. Modification of zeolites leads to an increase in conversion and selectivity of β-substitution in the naphthalene cyclohexylation.

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