Synthesis and Catalytic Evaluation of Ferrierite-Related Materials Synthesized in the Presence of co-Structure Directing Agents

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1089-1104 ◽  
Author(s):  
Raquel García ◽  
Ana Belén Pinar ◽  
Carlos Márquez-Alvarez ◽  
Enrique Sastre ◽  
Joaquín Pérez-Pariente
Keyword(s):  
Catalytic Activity ◽  
Organic Molecules ◽  
Organic Cation ◽  
Zeolite Synthesis ◽  
Structure Directing Agent ◽  
Sodium Cations ◽  
Systematic Exploration ◽  
Structure Directing Agents

We report on the systematic exploration of zeolite synthesis using a combination of organic molecules of different size. The effect of changing the co-structure directing agent, co-SDA, (tetramethylammonium or quinuclidine) and its replacement by sodium cations, when used together with the bulky organic cation 1-benzyl-1-methylpyrrolidinium (bmp) is analyzed and compared with preparations where bmp is replaced by the related cation (S)-1-benzyl-2-hydroxymethyl-1-methylpyrrolidinium (bmprol). The tendency to direct the synthesis to ferrierite or ferrierite-like materials depending on the particular combination of bulky organic cation and co-SDA is discussed. The catalytic activity of some of the materials synthesized was tested in the isomerization of m-xylene.

Super-ions of sodium cations with hydrated hydroxide anions: inorganic structure-directing agents in zeolite synthesis

2021 ◽  
Author(s):  
Karel Asselman ◽  
Nick Pellens ◽  
Sambhu Radhakrishnan ◽  
C. Vinod Chandran ◽  
Johan Martens ◽  
...  
Keyword(s):  
Liquid State ◽  
Zeolite Synthesis ◽  
Sodium Cations ◽  
Zeolite Formation ◽  
Structure Directing Agents ◽  
Direct Correspondence ◽  
Inorganic Structure

In inorganic zeolite formation, a direct correspondence between liquid state species in the synthesis and the supramolecular decoration of the pores in the as-made final zeolite has never been reported....

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.

Zeolite synthesis in the presence of flexible diquaternary alkylammonium ions (C2H5)3N+(CH2)nN+(C2H5)3 with n=3–10 as structure-directing agents

2003 ◽  
Vol 60 (1-3) ◽  
pp. 237-249 ◽  
Author(s):  
Song-Ho Lee ◽  
Chae-Ho Shin ◽  
Guang Jin Choi ◽  
Tae-Jin Park ◽  
In-Sik Nam ◽  
...  
Keyword(s):  
Zeolite Synthesis ◽  
Structure Directing Agents

scholarly journals Charge distribution and conformational stability effects of organic structure-directing agents on zeolite synthesis

2018 ◽  
Vol 54 (5) ◽  
pp. 487-490 ◽  
Author(s):  
Donghui Jo ◽  
Suk Bong Hong
Keyword(s):  
Charge Distribution ◽  
Conformational Stability ◽  
Zeolite Synthesis ◽  
Organic Structure ◽  
Structure Directing Agents ◽  
Theoretical Evidence

Experimental and theoretical evidence for the charge distribution and conformational stability effects of organic structure-directing agents on zeolite synthesis in fluoride media is presented.

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