Results 171 to 180 of about 19,084 (216)
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Conversion of ethanol over zeolite H‐ZSM‐5
Chemical Engineering & Technology, 1994AbstractThe conversion of ethanol over H‐ZSM‐5 was studied as a function of ethanol partial pressure, reaction temperature, weight hourly space velocity and Si/Al ratio. The results obtained were in qualitative agreement with most of those in the literature.
Schulz, Juergen, Bandermann, Friedhelm
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Diffusion of cyclohexanes in ZSM-5 zeolites
Journal of Catalysis, 1988Abstract Diffusion coefficients have been measured for the diffusion of cyclohexane and alkylcyclohexanes ranging from methyl- to pentylcyclohexane in ZSM-5-type zeolites using the samples of flat plate-like crystallite. The uptake curves of Cyclohexanes by these samples are considered to represent primarily the diffusion of Cyclohexanes into the ...
Hakze Chon, Dong Ho Park
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Preparation of zeolite ZSM-5 membranes
1997NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Zeolite ZSM-5 membranes were prepared on porous [...] disks by in-situ crystallization using a clear solution of optimized composition [...].
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Coke formation in zeolite ZSM-5
Journal of Catalysis, 1986Abstract The coke contents and sorption capacities of three ZSM-5 zeolites with different Al Si ratios were followed during methanol conversion until the zeolites were completely deactivated. For two of the zeolites the volume of coke exceeded the concomitant decrease in void volume, so that some coke must have been sited on the external ...
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Organic ion exchange of ZSM-5 zeolite
Zeolites, 1988The ion-exchange properties of organic substituted ammonium cations in ZSM-5 ion exchange were found to be considerably different from those of inorganic cations. All the organic ions studied have exceptionally high selectivities. Full-capacity exchange is readily attained except for those cations unable to penetrate the ZSM-5 pore opening because of ...
P. Chu, F.G. Dwyer
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Active Sites in Fe/ZSM-5 Zeolite
Catalysis Surveys from Asia, 2010Fe/ZSM-5 zeolite has shown great potential in the selective oxidations of hydrocarbons such as methane and benzene. The various competing active sites of Fe/ZSM-5 zeolite are reviewed, including the mono-iron, oxygen-bridged [Fe, X] (X = Fe, Al) and peroxide species; in addition, the influences of H2 pretreatment are considered.
Gang Yang +4 more
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Adsorption of water on ZSM-5 zeolites
Thermochimica Acta, 1995The non-isothermal desorption of water adsorbed on ZSM-5 zeolites at room temperature shows, depending on the cation type (H+, Na+), differently structured desorption curves. A kinetic analysis based on various methods shows that the course of desorption is well described by a first order rate equation considering a distribution function for the ...
B. Hunger +4 more
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Adsorption of Methanol on ZSM-5 Zeolites
Langmuir, 1997The interaction of methanol with a NaZSM-5 and a HZSM-5 zeolite was investigated by means of temperature-programmed desorption (TPD) and adsorption measurements. For both zeolites the desorption curves are structured, indicating different adsorption sites.
Bernd Hunger +3 more
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Aromatization of propene on ZSM-5 zeolites
Reaction Kinetics & Catalysis Letters, 1990Cu-ZSM-5, CuZn-ZSM-5 and H-ZSM-5 have been studied for propene aromatization at comparable conditions. It was established that all samples are active for aromatization (yields ⋟50%) and demonstrate high selectivity for benzene, toluene and xylenes formation (⋟ 90%). The role of acid centers in all stage of the aromatization is discussed.
Z. Popova, K. Aristirova, C. Dimitrov
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