Synthesis of EMT-rich faujasite in the presence of organic template of low-cost polyquaternium-6

Liu, Shuzhen; Li, Liansheng; Li, Caijin; Xiong, Xiang; Xiao, Feng‐Shou

doi:10.1007/s10934-006-9078-y

Cited by 16 publications

(14 citation statements)

References 27 publications

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“…The excellent structure and suitable distribution of protonic sites of EMT may bring benefits in its activity, selectivity or zeolite stability. The EMT material shows more interesting catalytic properties than FAU, but the high synthesis cost hinders its practical use [19]. 5 recorded, such as CSZ-1, ECR-30, CSZ-3, ZSM-3 and ZSM-20 [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CoMo catalysts supported on EMT/FAU intergrowth zeolites with different morphologies and their hydro-upgrading performances for FCC gasoline

Gao

Duan

Zhang

et al. 2015

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Synthesis of CoMo catalysts supported on EMT/FAU intergrowth zeolites with different morphologies and their hydro-upgrading performances for FCC gasoline

Gao

Duan

Zhang

et al. 2015

Chemical Engineering Journal

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“…The major difference between two materials is that the cubic FAU polymorph features only one type of supercage (with a volume of 1.2 nm 3 ), whereas the 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 ) 46. Thus the EMT material shows different catalytic activity and selectivity to FAU as a FCC catalyst 47. 48 The objective of the present study is to explore the nucleation process in a conventional hydrogel system.…”

Section: Introductionmentioning

confidence: 99%

“…[46] Thus the EMT materials hows different catalytic activity and selectivity to FAUa saFCC catalyst. [47,48] The objective of the present study is to explore the nucleationp rocess in ac onventionalh ydrogel system. More precisely,t he goal is to determine the temporal and spatial aspects of the formation of the first nuclei by following the chemical and physical evolution of the solid phase.…”

Section: Introductionmentioning

confidence: 99%

3D Study of the Morphology and Dynamics of Zeolite Nucleation

Melinte

Georgieva

Springuel‐Huet

et al. 2015

Chemistry A European J

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The principle aspects and constraints of the dynamics and kinetics of zeolite nucleation in hydrogel systems are analyzed on the basis of a model Na-rich aluminosilicate system. A detailed time-series EMT-type zeolite crystallization study in the model hydrogel system was performed to elucidate the topological and temporal aspects of zeolite nucleation. A comprehensive set of analytical tools and methods was employed to analyze the gel evolution and complement the primary methods of transmission electron microscopy (TEM) and nuclear magnetic resonance (NMR) spectroscopy. TEM tomography reveals that the initial gel particles exhibit a core-shell structure. Zeolite nucleation is topologically limited to this shell structure and the kinetics of nucleation is controlled by the shell integrity. The induction period extends to the moment when the shell is consumed and the bulk solution can react with the core of the gel particles. These new findings, in particular the importance of the gel particle shell in zeolite nucleation, can be used to control the growth process and properties of zeolites formed in hydrogels.

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“…Also, zeolites such as SSZ-13 (CHA), SSZ-33 (CON), SSZ-35 (STF), and SSZ-42 (IFR) have been prepared in the same manner. Important EMT-type zeolites that usually are templated by the toxic 18-crown-6 [32], recently have been produced successfully using the poly(diallyl dimethyl ammonium) chloride (polyquaternium-6), which is a component of shampoo [33]. One of the most important applications of the zeolite Cu-SSZ-13 is as catalyst in the reaction of reduction of NO x by ammonia and would benefit greatly from reduced cost in its synthesis.…”

Section: Small Organic Structure Directing Agents (Osdas)mentioning

confidence: 99%

Template-based syntheses for shape controlled nanostructures

Pérez-Page

et al. 2016

Advances in Colloid and Interface Science

132

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A variety of nanostructured materials are produced through template-based synthesis methods, including zerodimensional, one-dimensional, and two-dimensional structures. These span different forms such as nanoparticles, nanowires, nanotubes, nanoflakes, and nanosheets. Many physical characteristics of these materials such as the shape and size can be finely controlled through template selection and as a result, their properties as well. Reviewed here are several examples of these nanomaterials, with emphasis specifically on the templates and synthesis routes used to produce the final nanostructures. In the first section, the templates have been discussed while in the second section, their corresponding synthesis methods have been briefly reviewed, and lastly in the third section, applications of the materials themselves are highlighted. Some examples of the templates frequently encountered are organic structure directing agents, surfactants, polymers, carbon frameworks, colloidal sol-gels, inorganic frameworks, and nanoporous membranes. Synthesis methods that adopt these templates include emulsion-based routes and template-filling approaches, such as self-assembly, electrodeposition, electroless deposition, vapor deposition, and other methods including layer-by-layer and lithography. Templatebased synthesized nanomaterials are frequently encountered in select fields such as solar energy, thermoelectric materials, catalysis, biomedical applications, and magnetowetting of surfaces.

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Synthesis of EMT-rich faujasite in the presence of organic template of low-cost polyquaternium-6

Cited by 16 publications

References 27 publications

Synthesis of CoMo catalysts supported on EMT/FAU intergrowth zeolites with different morphologies and their hydro-upgrading performances for FCC gasoline

Synthesis of CoMo catalysts supported on EMT/FAU intergrowth zeolites with different morphologies and their hydro-upgrading performances for FCC gasoline

3D Study of the Morphology and Dynamics of Zeolite Nucleation

Template-based syntheses for shape controlled nanostructures

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