Browsing Τμήμα Χημείας / Department of Chemistry by Author "Bennett, C. O."
Now showing items 1-14 of 14
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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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CO chemisorption and hydrogenation of surface carbon species formed after CO/He reaction on Rh/MgO: A transient kinetic study using FTIR and mass spectroscopy
Efstathiou, Angelos M.; Chafik, T.; Bianchi, D.; Bennett, C. O. (1994)The chemisorption of CO and hydrogenation of surface adsorbed carbon species formed after reaction of CO/He with Rh/MgO catalyst in the range 300-573 K were studied by transient methods employing both FTIR and mass ...
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The CO H2 reaction on Rh Al2O3. I. Steady-state and transient kinetics
Efstathiou, Angelos M.; Bennett, C. O. (1989)Various hydrogen titrations yield the surface composition of Rh Al2O3 during the CO H2 reaction at temperatures in the range 180-260 °C. There is a very small amount of active carbon Ca, 0.02-0.06 monolayer, and 0.70-0.98 ...
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The CO H2 reaction on Rh Al2O3. II. Kinetic study by transient isotopic methods
Efstathiou, Angelos M.; Bennett, C. O. (1989)Transient isotopic methods have been used to study the CO H2 reaction over 5% Rh Al2O3 in the temperature range 180-260 °C. The steady-state tracing method permits the determination of the surface coverage of CO and active ...
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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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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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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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Enthalpy and entropy of H2 Adsorption on Rh/Al2O3 measured by temperature-programmed desorption
Efstathiou, Angelos M.; Bennett, C. O. (1990)Temperature-programmed desorption spectroscopy under pseudo-equilibrium conditions has been used to obtain the coverage dependence of the heat and entropy of hydrogen adsorption for a 5-wt% Rh/Al2O3 catalyst. This method ...
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In Situ Determination of Surface Carbon Species Formed on Rh/Al2O3 During CO/H2 Reaction by using Various Transient and Isotopic Methods
Efstathiou, Angelos M.; Chafik, T.; Bianchi, D.; Bennett, C. O. (1993)The evolution of surface species formed during the CO/H2 reaction at 220°C on a 1wt% Rh/Al2O3 catalyst was studied by transient methods using both mass spectrometry and FTIR. There is a very small amount of active carbon, ...
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Surface Species on Rh/Al203 During CO/H2 Reaction Studied by Transient Techniques
Efstathiou, Angelos M.; Bennett, C. O. (1989)Methanation of a 9/1 mixture of H2/CO at 180°0 has been studied by transient techniques in a gradientless microreactor. The use of isotopic techniques and temperature programmed reduction (TPR) made possible the measurement ...
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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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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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A Transient Kinetic Study of the Co/H2 Reaction on Rh/Al2O3 Using FTIR and Mass Spectroscopy
Efstathiou, Angelos M.; Chafik, T.; Bianchi, D.; Bennett, C. O. (1994)The evolution of surface species (their chemical composition and surface coverage) formed during the CO/H2 reaction at 220°C on 1 wt% Rh/Al2O3 catalyst was studied by transient isotopic and various hydrogen titration ...
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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 ...