Spectroscopic and Catalytic Characterization of Faujasites Dealuminated VIA the (NH4)2SiF6 Method

Neuber, Marita; Dondur, V.; Karge, Hellmut G.; Pacheco, Luis A.; Weitkamp, Jens

doi:10.1016/s0167-2991(09)60623-6

Cited by 18 publications

(15 citation statements)

References 11 publications

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“…H,Na-Y in turn was assumed to exhibit lower strength and activity of OH groups than mordenite (Si/AI = 5). Moreover, an increase of acidity strength and activity was reported for an increase of dealumination of the framework of R,Na-Y [70][71][72][73][74]. In this context, the strength of the acidity of the respective zeolites has usually been characterized by titration with bases, temperature-programmed desorption of ammonia or pyridine and/or micro calorimetric measurements of the differential heats of adsorption of such probe molecules (see [70][71][72]74]).…”

Section: Fundamental Stretching Bandsmentioning

confidence: 99%

Characterization of Zeolites — Infrared and Nuclear Magnetic Resonance Spectroscopy and X-Ray Diffraction

Karge¹,

Hunger²,

Beyer³

1999

Catalysis and Zeolites

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Section: Fundamental Stretching Bandsmentioning

confidence: 99%

Characterization of Zeolites — Infrared and Nuclear Magnetic Resonance Spectroscopy and X-Ray Diffraction

Karge¹,

Hunger²,

Beyer³

1999

Catalysis and Zeolites

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“…However, conventional zeolite Y (Si/Al molar ratio below 2.5) application to petrochemical industry is limited due to the weak acidity, as well as poor hydrothermal stability. For the sake of better industrial realm application, conventional Y zeolite is replaced by a high silica ultrastable Y zeolite (USY, with Si/Al > 4) [8], prepared from various posttreatments which include steaming at elevated temperatures [9,10], introduction of SiCl 4 vapor at moderate temperatures [11], treatment with ammonium hexafluorosilicate [12], and chelating agents [13]. Unfortunately, these posttreatments methods require several posttreatments and heat treatment often leads to structure being distorted.…”

Section: Introductionmentioning

confidence: 99%

A Simple Method of Preparation of High Silica Zeolite Y and Its Performance in the Catalytic Cracking of Cumene

Shi

et al. 2016

Journal of Nanotechnology

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A series of high silicon zeolites Y were prepared through direct synthetic method by using silica sol as the silicon source and sodium aluminate as the aluminum source. The effects of alkalinity and crystallization time of the process of synthesis were investigated. To separately reveal the crystalline structure, element content, morphology, and surface areas, the as-synthesized zeolite Y was characterized by powder X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), and N2adsorption-desorption isotherms (BET). The results show the as-synthesized zeolite Y with high relative crystallization and uniform morphology; the SiO2/Al2O3ratio was about 4.54~6.46. For an application, the zeolite cracking activity was studied with cumene as the probe molecules.

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“…(NH4hSiFs has been used to dealuminate zeolite Y [Akporiaye et a/., 1986;Neuber et a/., 1988;Skeels and Breck, 1984].…”

Section: Chemical Treatmentmentioning

confidence: 99%

The characterization and elimination of the external acidity of ZSM-5

Weber

Fletcher

Möller

et al. 1996

Microporous Materials

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It has been a great pleasure to work with all the guys and girls in the group because of the ambience that exists in the group, allowing us to enjoy the student-life we love to live. Salutations to James and Miles, who were always willing to share their wisdom and experience, either academically or socially. Thanks to Klaus, for his invaluable suggestions when all else failed. Thanks to Connie, Leslie and Pam, without whom all the things we take for granted would never get done. Without the technical support of Tony Barker, Rob Senekal and Charlie Ledger, I would not have had the equipment which by now has become one of my closest friends and greatest enemies. A special thanks to my parents, Ton and Ank, for their unassuming belief in me, and to Marc and Marjolijn, who've had to put up with me for over two decades.

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Spectroscopic and Catalytic Characterization of Faujasites Dealuminated VIA the (NH4)2SiF6 Method

Cited by 18 publications

References 11 publications

Characterization of Zeolites — Infrared and Nuclear Magnetic Resonance Spectroscopy and X-Ray Diffraction

Characterization of Zeolites — Infrared and Nuclear Magnetic Resonance Spectroscopy and X-Ray Diffraction

A Simple Method of Preparation of High Silica Zeolite Y and Its Performance in the Catalytic Cracking of Cumene

The characterization and elimination of the external acidity of ZSM-5

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