Results 141 to 150 of about 2,875 (187)

Structure of synthetic zeolite ZSM-5

Nature, 1978
ZEOLITE ZSM-5 (ref. 1) is a member of a new class of shape selective catalysts with unique channel structures which differ from the familiar large-pore faujasite and small-pore zeolites such as Linde Type A and erionite. They also possess unusual catalytic properties and have high thermal stability.
G. T. KOKOTAILO, S. L. LAWTON, D. H. OLSON, W. M. MEIER   +3 more
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Steaming of ZSM-5 zeolite film

Zeolites, 1992
Abstract The change in morphology of the ZSM-5 zeolite films during steaming at 443 K was studied. The crystal growth of zeolite, 5–10 μm in size, from the layer of microcyrstalline ZSM-5 zeolites was first visualized by scanning electron microscopy.
T. Sano, Y. Kiyozumi, F. Mizukami, H. Takaya, T. Mouri, M. Watanabe   +5 more
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Adsorption Properties of ZSM-5 Zeolites

Collection of Czechoslovak Chemical Communications, 1998
Adsorption properties determined by physical adsorption of nitrogen for a series of ZSM-5 zeolite samples with various Si/Al ratios and different crystal size were compared. In addition to the BET method, the t-plot method was used to determine the microporosity of samples.
Pavol Hudec, Agáta Smiešková, Zdenek Židek, Milan Zúbek, Petr Schneider, Milan Kočiřík, Jana Kozánková   +6 more
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Studies in the synthesis of ZSM-5 zeolites

Zeolites, 1982
ZSM-5 zeolites have been synthesized using tri-ethyl-n-propylammonium (TEPA) cations as the source of the organic base. X-ray diffraction, framework i.r. spectroscopy, scanning electron microscopy, adsorption of n-heptane and cyclohexane and product distribution in the conversion of methanol to hydrocarbons have been utilized in characterizing the ...
S.B. Kulkarni, V.P. Shiralkar, A.N. Kotasthanc, R.B. Borade, P. Ratnasamy   +4 more
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Preparation of zeolite ZSM-5 membranes

1997
NOTE: 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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Conversion of ethanol over zeolite H‐ZSM‐5

Chemical Engineering & Technology, 1994
AbstractThe 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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Phosphatation of Zeolite H‐ZSM‐5: A Combined Microscopy and Spectroscopy Study

ChemPhysChem, 2014
AbstractA variety of phosphated zeolite H‐ZSM‐5 samples are investigated by using a combination of Fourier transfer infrared (FTIR) spectroscopy, single pulse 27Al, 29Si, 31P, 1H‐31P cross polarization (CP), 27Al‐31P CP, and 27Al 3Q magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy, scanning transmission X‐ray microscopy (STXM) and
van der Bij, Hendrik E., Aramburo, Luis R., Arstad, Bjornar, Dynes, James J., Wang, Jian, Weckhuysen, Bert M.   +5 more
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Coke formation in zeolite ZSM-5

Journal of Catalysis, 1986
Abstract 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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Ozone-Assisted Catalysis of Toluene with Layered ZSM-5 and Ag/ZSM-5 Zeolites

Plasma Chemistry and Plasma Processing, 2013
This paper presents a new type of ozone-assisted catalysis for toluene decomposition. The different catalytic activities of ZSM-5 and Ag/ZSM-5 were incorporated into a layered catalyst with a tandem configuration. Instead of increasing the amount of metal catalyst, the layered catalyst was formed, which had an equal amount of bare ZSM-5 and Ag/ZSM-5 ...
Hyun-Ha Kim, Masami Sugasawa, Hiroshi Hirata, Yoshiyuki Teramoto, Katsunori Kosuge, Nobuaki Negishi, Atsushi Ogata   +6 more
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The reaction of propane over ZSM-5-H and ZSM-5-Zn zeolite catalysts

Applied Catalysis, 1985
The zinc-exchanged (ZSM-5-Zn) and proton-exchanged (ZSM-5-H) forms of ZSM-5 zeolite have been studied for the conversion of propane to aromatic hydrocarbons at temperatures in the range 730-820 K. ZSM-5-Zn was the more active and gave the better BTX selectivity (60-70C%). Other reaction products were C1C2 hydrocarbons and C9+ aromatics.
T. Mole, J.R. Anderson, G. Creer
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