Zeolite (MFI) Crystal Morphology Control Using Organic Structure-Directing Agents

2004 ◽  
Vol 16 (26) ◽  
pp. 5697-5705 ◽  
Author(s):  
Griselda Bonilla ◽  
Isabel Díaz ◽  
Michael Tsapatsis ◽  
Hae-Kwon Jeong ◽  
Yongjae Lee ◽  
...  
Keyword(s):  
Crystal Morphology ◽  
Morphology Control ◽  
Organic Structure ◽  
Structure Directing Agents

scholarly journals Synthesis of ZSM-23 (MTT) zeolites with different crystal morphology and intergrowths: effects on the catalytic performance in the conversion of methanol to hydrocarbons

2019 ◽  
Vol 9 (23) ◽  
pp. 6782-6792 ◽  
Author(s):  
A. Molino ◽  
J. Holzinger ◽  
K. A. Łukaszuk ◽  
D. Rojo-Gama ◽  
A. E. Gunnæs ◽  
...  
Keyword(s):  
Crystal Morphology ◽  
Catalytic Performance ◽  
Crystalline Phases ◽  
Organic Structure ◽  
Methanol To Hydrocarbons ◽  
Structure Directing Agents

A series of zeolite ZSM-23 samples prepared with different organic structure-directing agents, gave rise to crystalline phases, which show a large variety of particle dimensions.

scholarly journals Alcohol-assisted synthesis of high-silica zeolites in the absence of organic structure-directing agents

2021 ◽  
Vol 42 (4) ◽  
pp. 563-570
Author(s):  
Huimin Luan ◽  
Chi Lei ◽  
Ye Ma ◽  
Qinming Wu ◽  
Longfeng Zhu ◽  
...  
Keyword(s):  
Organic Structure ◽  
High Silica ◽  
High Silica Zeolites ◽  
Structure Directing Agents

Crystal Morphology Control of Synthetic Giniite by Alkaline Cations and pH Variations

2017 ◽  
Vol 17 (9) ◽  
pp. 4710-4714 ◽  
Author(s):  
Renato Gonçalves ◽  
Ricardo Martins ◽  
Carlos M. Costa ◽  
Stanislav Ferdov ◽  
Senentxu Lanceros-Méndez
Keyword(s):  
Crystal Morphology ◽  
Morphology Control ◽  
Alkaline Cations ◽  
Ph Variations

scholarly journals Zeolite Synthesis Using Imidazolium Cations as Organic Structure-Directing Agents

2019 ◽  
Vol 10 (1) ◽  
pp. 303
Author(s):  
Paloma Vinaches ◽  
Sibele Pergher
Keyword(s):  
Research Study ◽  
Research Area ◽  
Zeolite Synthesis ◽  
New Materials ◽  
Imidazolium Cation ◽  
Organic Structure ◽  
Imidazolium Cations ◽  
Structure Directing Agents ◽  
Direction Effect

Imidazolium-derivative cations are very interesting molecules used as organic structure-directing agents (OSDAs) for zeolite synthesis, widening the possibilities of new materials and applications in this research area. In this review, the studies performed at LABPEMOL using this kind of compound are presented after a quick overview on imidazolium derivatives. The first zeolite synthesis results that started this research study were obtained with 1-butyl-3-methylimidazolium chloride. Then, the design of new OSDAs based on the imidazolium cation, such as 1,2,3-triethylimidazolium, 2-ethyl-1,3-dimethylimidazolium and 1,2,3-triethyl-4-methylimidazolium, is reported. Afterwards, the structure-direction effect caused by the introduction of heteroatoms with already-published imidazolium derivatives (for example, the Al3+ insertion into zeolite frameworks with two different OSDAs and the silicoaluminophosphate (SAPO) synthesis using 2-ethyl-1,3,4 trimethylimidazolium cations) is discussed. Finally, we also present a quick overview of some achievements of other laboratories.

scholarly journals Revisiting the seed-assisted synthesis of zeolites without organic structure-directing agents: insights from the CHA case

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5304-5315 ◽  
Author(s):  
Grandprix T. M. Kadja ◽  
Iftitah R. Kadir ◽  
Adroit T. N. Fajar ◽  
Veinardi Suendo ◽  
Rino R. Mukti
Keyword(s):  
Crystallization Behaviour ◽  
Structure Directing Agent ◽  
Organic Structure ◽  
Structure Directing Agents

Herein, the crystallization behaviour of the CHA zeolite synthesized via the seed-assisted method and in the absence of an organic structure-directing agent has been revisited.

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