Special articles on zeolite chemistry and technology. Measurements of effective diffusivities in zeolite catalyst particles.
نویسندگان
چکیده
منابع مشابه
Synthesis of novel perfluoroalkylglucosides on zeolite and non-zeolite catalysts.
Perfluoroalkylglucosides comprise a very important class of fluorine-containing surfactants. These compounds can be synthesized by using the Fisher reaction, starting directly from glucose and the required perfluoroalcohols. We wish to report on the use of zeolite catalysts of different structure and composition for the synthesis of perfluoroalkylglucosides when using glucose and 1-octafluorope...
متن کاملXylenes Reactions and Diffusions in ZSM-5 Zeolite based Catalyst
Xylenes transformations have been investigated over ZSM-5 zeolite in a riser simulator that mimics closely the operation of commercial fluidized-bed reactors. P-xylene was found to be more reactive than the other isomers followed by o-xylene and m-xylene was found to be least reactive. The order of reactivity is consistent with the order of diffusivity. At low temperature (400°C), isomerization...
متن کاملThermal Conductivity and Melting Point Measurements on Paraffin- Zeolite Mixtures
This paper presents measurements of the thermal conductivity of paraffins mixtured with zeolites of the type 5A and 13X. Because of their high enthalpy change at the phase transition paraffins are able to store more thermal energy at nearly isothermal conditions than sensible heat materials. The poor thermal conductivity of paraffins is a disadvantage, however. The zeolite provides a structure ...
متن کاملCatalyst in a Box: Zeolite-supported Enantioselective Catalysis
INTRODUCTION Enantioselective Catalysis Beginning with the first homogeneous asymmetric metal-catalyzed reaction performed by Noyori—a cyclopropanation—the area of enantioselective catalysis in organic chemistry has become a major topic of discussion and research. Homogeneous, asymmetry-inducing catalysts have been developed for a wide range of reactions, especially notable are those developed ...
متن کاملDielectric Properties of Electrorheological Fluids Containing Zeolite Particles
Relationships between electrorheological (ER) effects and dielectric properties of suspensions are investigated from measurements of ER and dielectric properties of suspensions containing particles of type A zeolite such as 3A, 4A and 5A. In each suspension containing zeolite 3A or 4A particles, the ER effect is recognized, I.e., an increase in the apparent viscosity is observed when an electri...
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ژورنال
عنوان ژورنال: NIPPON KAGAKU KAISHI
سال: 1989
ISSN: 2185-0925,0369-4577
DOI: 10.1246/nikkashi.1989.569