Browsing Τμήμα Χημείας / Department of Chemistry by Author "Suib, S. L."
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Article
Adsorption study by transient tracing methods. theory and modeling
Szedlacsek, P.; Efstathiou, Angelos M.; Bennett, C. O.; Suib, S. L. (1993)The advantages of transient tracing methods (TTM) in studying heterogeneous catalytic systems have been described by many authors. This chapter presents a new application of TTM for studying adsorption. The basic idea of ...
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Article
CO-Induced changes in the oxidation state of rhodium supported on MgO: X-Ray photoelectron spectroscopic study
Efstathiou, Angelos M.; Tan, B. J.; Suib, S. L. (1993)The oxidation state of Rh after various CO/He treatments with a 2.5 wt% Rh/MgO catalyst was investigated with X-ray photoelectron spectroscopy. The rhodium metal particles, initially in a reduced state (Rh0), were found ...
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Article
Cyclopropane isomerization over Eu3+NaX zeolites
Simon, M. W.; Efstathiou, Angelos M.; Bennett, C. O.; Suib, S. L. (1992)Cyclopropane isomerization to propylene over various Eu3+ loadings in NaX zeolite have been studied by measurements of steady-state and transient kinetics and by Fourier transform infrared spectroscopy. As Eu3+ loading ...
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Article
Encapsulation of molecular hydrogen in ion-exchanged a zeolites at 1 atm
Efstathiou, Angelos M.; Borgstedt, E. v. R.; Suib, S. L.; Bennett, C. O. (1992)About 1.5 and 2.0 μmol/g of molecular HZ is encapsulated in the sodalite and supercages, respectively, of NaA zeolite at 1 atm H2 pressure and temperatures higher than 200°C. At 37°C and 1 atm Hz pressure, encapsulation ...
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Article
Encapsulation of molecular hydrogen in zeolites at 1 atm
Efstathiou, Angelos M.; Suib, S. L.; Bennett, C. O. (1990)About 1 μmol/g of molecular H2 is encapsulated in the sodalite cages of NaX zeolite at 37°C and 1 bar H2 pressure. The removal of this hydrogen by diffusion can be studied by temperature programming between 40 and 150°C ...
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Article
Hydrogen Surface Concentration Effect on the Temperature-Programmed Hydrogenation of Adsorbed Carbonaceous Species on an Iron/Alumina Catalyst
Halafi, H.; Borgstedt, E.; Efstathiou, Angelos M.; Suib, S. L.; Bianchi, D. (1993)Temperature-programmed hydrogenation (TPH) of adsorbed carbonaceous species on metallic catalysts is a useful method to measure their numbers and reactivities. In the present paper it is shown that changes in the T.P.H ...
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Article
Transient diffusion, desorption, and reaction studies of cyclopropane and propylene with NaX and Eu/NaX zeolites
Efstathiou, Angelos M.; Suib, S. L.; Bennett, C. O. (1992)The exchange of Eu3+ for Na+ cations into the sodalite cages of X zeolite (Eu25Na11X) leads selectively to the isomerization reaction of cyclopropane to propylene. The latter reaction is catalyzed by Brønsted acid sites ...
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Article
Transient diffusion, sorption, and desorption of cyclopropane in NaX zeolite
Efstathiou, Angelos M.; Suib, S. L.; Bennett, C. O. (1991)Transient diffusion, sorption, and desorption experiments of cyclopropane in Nax zeolite at 1 bar in a flow microreactor reveal that the nature of the diluent gas used in the sorbate mixture affects the kinetics of ...
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Article
Transient sorption and desorption studies of cyclopropane and propylene with Cs/NaX and Ni/NaX zeolites
Efstathiou, Angelos M.; Suib, S. L.; Bennett, C. O. (1992)Transient diffusion and sorption experiments of cyclopropane and propylene in Cs+and Ni2+ ion-exchanged Zeolites X in a flow microreactor reveal that the nature of the diluent gas affects the kinetics of intracrystalline ...