Synthesis, characterization, and catalytic properties of silica-rich faujasite-type zeolite (FAU) and its hexagonal analog (EMT) prepared by using crown-ethers as templates

Dougnier, F.; Patarin, Joël; Guth, J.L.; Anglerot, D.

doi:10.1016/0144-2449(92)90078-4

Cited by 122 publications

(54 citation statements)

References 11 publications

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“…It leads to the formation of well-crystallized EMC-1 zeolite, from a wide range of gel compositions. This is in accordance with previous works [16][17][18]. The use of AC5 allows to obtain a FAU-type zeolite from several gel compositions, but P zeolite also co-crystallizes in a wide range of gel composition, which might be interpreted as a lower structure-directing effect of AC5 compared to C5.…”

Section: Effect Of the Synthesis Gel Compositionsupporting

confidence: 77%

“…Between 200 and 650°C, several exothermic peaks indicate that the structure-directing agents occluded into the zeolite framework are main contributors of the weight loss, along with some remaining water molecules. After determination of the approximate molecular weight of a FAU-type zeolite unit cell (M w = 12 328 g/mol, Si/Al = 4.3) and that 8 crown ether/sodium cation complexes are present per unit cell of a completely crystallized sample [18], one can evaluate the samples purity by calculating the number of crown ethers in one unit cell. As expected, 8 complexes are present per unit cell for the samples structured by C5 (12% w/w) and AC5 (11% w/w).…”

Section: Characterization Of the Crystallized Samplesmentioning

confidence: 99%

“…Thus, Guth et al reported the crystallization of a high silica FAU-type zeolite commonly named EMC-1 (Elf Mulhouse Chemistry One) by using the 15-crown-5 ether as SDA [16][17][18]. The catalytic performances of FAU-type zeolite have been widely studied.…”

Section: Introductionmentioning

confidence: 99%

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The Use of Original Structure-Directing Agents for the Synthesis of EMC-1 Zeolite

Daou

Dhainaut

Chappaz

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 70, n°2, et téléchargeable ici D o s s i e rOil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 3, Copyright © 2015, IFP Energies nouvelles > Editorial -Towards the Laboratory of the Future for the Factory of the FutureÉditorial -Vers le laboratoire du futur pour construire l'usine du futur Abstract -By using a steric approach, it is possible to design templates matching closely with an inorganic framework. Herein, the design, synthesis and successful application of several di(azacrown ether) templates to direct the formation of EMC-1 zeolite (FAU-type) are reported. Following a high throughput experiment design, the synthesis gel composition was optimized to obtain well-crystallized materials. Taking into account their respective crystallization rates, their textural and morphological properties were comparable to their counterparts, typically structured by 15-crown-5 ether.Re´sume´-L'utilisation d'agents structuraux originaux pour la synthe`se de ze´olithe EMC-1 -En utilisant une approche « ste´rique », il est possible de concevoir des agents structurants qui s'adaptent bien a`la porosite´de la charpente mine´rale. Ici, la conception, la synthe`se et l'application re´ussie de plusieurs agents structurants de type di(aza-e´ther-couronne) pour diriger la formation de ze´olithe EMC-1 de type FAU sont reporte´s. Suite a`des synthe`ses a`haut-de´bit, la composition du gel de synthe`se a e´te´optimise´e pour obtenir des mate´riaux bien cristallise´s. Compte tenu de leurs taux de cristallisation respectifs, leurs proprie´te´s texturales et morphologiques sont comparables a`leurs homologues, ge´ne´ralement synthe´tise´s en pre´sence du 15-e´ther-couronne-5.

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Section: Effect Of the Synthesis Gel Compositionsupporting

confidence: 77%

Section: Characterization Of the Crystallized Samplesmentioning

confidence: 99%

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The Use of Original Structure-Directing Agents for the Synthesis of EMC-1 Zeolite

Daou

Dhainaut

Chappaz

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…reported an effective synthesis of ultrasmall EMT zeolite crystals from the template-free colloidal precursors [24], and EMT-type zeolite is normally templated by high-cost 18-crown-6 ether [25]. Yokoi et al and Kamimura et al showed successful syntheses of RTH-and MTW-type zeolites [26,27].…”

Section: Introductionmentioning

confidence: 99%

Rational synthesis of Beta zeolite with improved quality by decreasing crystallization temperature in organotemplate-free route

Zhang

Xie

Meng

et al. 2013

Microporous and Mesoporous Materials

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“…Similar to the FAU zeolite, the EMT framework topology has a three-dimensional large (12-membered ring) pore system. The cubic FAU polymorph features only one type of supercage (with a volume of 1.15 nm 3 ), but a different stacking of faujasite sheets creates two cages in the EMT zeolite: a hypocage (0.61 nm 3 ) and a hypercage (1.24 nm 3 ) [ 45 ]. EMT zeolite showed excellent catalytic performance as FCC catalyst, but its high cost precludes its practical applications, compared with Y zeolite [ 10 , 11 ].…”

Section: Emt Zeolitementioning

confidence: 99%

Sustainable Routes for Zeolite Synthesis

Meng¹,

Wang²,

Xiao³

2016

Green Chemistry and Sustainable Technology

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The modern synthesis of zeolites mainly involves the use of organic templates, the addition of solvent, the preparation of starting gels, and the heating of the gels. Each step could be made greener in the future. This chapter presents a brief overview on the recently reported green routes for synthesizing zeolites, mainly focusing on the reduction or elimination of organic templates as well as the complete elimination of solvent. To overcome the disadvantages of using organic templates, nontoxic templates and template recycling steps have been employed in the zeolite syntheses. In addition, organotemplate-free synthesis has become a popular and universal methodology for synthesizing zeolites. Particularly, seed-directed synthesis in the absence of organic templates is a general route for synthesizing a series of zeolites. From an economic and environmental standpoint, solvent-free synthesis is a great move toward "green" synthesis of zeolite due to the following: high yields, high effi ciency, low waste, low pollution, low pressure, hierarchical porosity, and simple and convenient procedure. Combining the advantages of solvent-free and organotemplate-free synthesis would particularly open the pathway to a highly sustainable zeolite synthesis protocol in industry.

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Synthesis, characterization, and catalytic properties of silica-rich faujasite-type zeolite (FAU) and its hexagonal analog (EMT) prepared by using crown-ethers as templates

Cited by 122 publications

References 11 publications

The Use of Original Structure-Directing Agents for the Synthesis of EMC-1 Zeolite

The Use of Original Structure-Directing Agents for the Synthesis of EMC-1 Zeolite

Rational synthesis of Beta zeolite with improved quality by decreasing crystallization temperature in organotemplate-free route

Sustainable Routes for Zeolite Synthesis

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