Evaluation and Tailoring of Acid-Base Properties of Zeolites. Part 2

Dwyer, John

doi:10.1007/978-94-011-2604-5_16

“…Structurally, the increase of the Si/Al ratio corresponds to a decrease in the number of compensating cations and also in the fraction of negative charge interacting in the oxygen ( , ), producing an increase in the polarizability.…”

Section: Resultsmentioning

confidence: 99%

Zeolites as Pheromone Dispensers

Muñoz-Pallares

¹

,

Corma

²

,

Primo

³

et al. 2001

J. Agric. Food Chem.

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Modification of the chemical and structural properties of zeolites has led to the preparation of an optimized zeolitic dispenser for insect attractants such as n-decanol and trimedlure. The impact of zeolite variables such as the framework Si/Al ratio, nature of compensating cation, nature and strength of acid groups, and pore dimensions on the kinetics of emission has been studied, and the results are as follows. Zeolite pore dimensions and the presence or absence of acid sites have the greatest effect on the rate of release, decreasing with decreasing pore diameter and increasing acidity. Further tuning of the release characteristics is achieved by controlling the polarity and the polarizability of the framework by increasing the Si/Al ratio and nature of the compensating cations, i.e., the higher the polarizability and the lower the polarity, the slower the release of attractants.

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ZeolitesBased in part on the article Zeolites by Alan Dyer which appeared in theEncyclopedia of Inorganic Chemistry, First Edition.

Williams

¹

2005

Encyclopedia of Inorganic Chemistry

0

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This work looks at the natural formation of zeolites in our environment. It details the steps required in the laboratory to successfully manufacture zeolites, producing both novel and nature identical crystal forms. The classification of zeolites based on their aluminium content, pore/channel size is also covered in some detail. Finally the various physical and chemical properties that make zeolites so useful to everyday life are examined. These include their absorptive properties, ion‐exchange properties, desiccant properties, and catalytic properties.

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ZeolitesBased in part on the article Zeolites by Alan Dyer which appeared in theEncyclopedia of Inorganic Chemistry, First Edition.

Williams

¹

2005

Encyclopedia of Inorganic and Bioinorganic Chemistry

0

View full text Add to dashboard Cite

This work looks at the natural formation of zeolites in our environment. It details the steps required in the laboratory to successfully manufacture zeolites, producing both novel and nature identical crystal forms. The classification of zeolites based on their aluminium content, pore/channel size is also covered in some detail. Finally the various physical and chemical properties that make zeolites so useful to everyday life are examined. These include their absorptive properties, ion‐exchange properties, desiccant properties, and catalytic properties.

show abstract

Evaluation and Tailoring of Acid-Base Properties of Zeolites. Part 2

Cited by 3 publications

References 98 publications

Zeolites as Pheromone Dispensers

Zeolites as Pheromone Dispensers

ZeolitesBased in part on the article Zeolites by Alan Dyer which appeared in theEncyclopedia of Inorganic Chemistry, First Edition.

ZeolitesBased in part on the article Zeolites by Alan Dyer which appeared in theEncyclopedia of Inorganic Chemistry, First Edition.

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