Results 121 to 130 of about 9,508 (161)
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Hydrogen mordenite and hydronium mordenite. Ion exchange and thermal stability
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1975Isotherms for the Na+⇌ H3O+ exchange in mordenite showed irreversibility. Hydronium mordenite prepared from the Na-form could be fully re-converted to the Na-form with aqueous NaCl, NaOH or CH3COONa, but hydronium mordenite made by heating the NH4-form to 450°C and subsequent hydration underwent only ∼70 % exchange to the Na-form.
Richard M. Barrer, Jacek Klinowski
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tert-Butylation of toluene over mordenite and cerium-modified mordenite catalysts
Applied Catalysis A: General, 2006Abstract tert -Butylation of toluene with tert -butanol in the liquid phase was studied over large pore mordenite zeolite catalyst (H-MOR CBV 21A with Si/Al = 10.5) and over cerium-modified parent zeolite with 1–6 wt.% of cerium. The catalytic activity and para -selectivity of parent and cerium-modified H-mordenite catalysts is discussed.
G. Kostrab +6 more
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Partial Oxidation of Methane Catalyzed by H-Mordenite and Fluorinated Mordenite
Applied Catalysis, 1988Abstract Mordenite and fluorinated mordenite are compared as catalysts for the partial oxidation of methane in the temperature range 350–425°C. With both catalysts the major product is ethylene but the latter catalyst yields higher conversions up to 425°C at which temperature carbon monoxide and carbon dioxide become the primary products. Eliminating
S. Kowalak, J.B. Moffat
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Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1974
Ion-exchange isotherms have been measured for synthetic mordenite involving the cation pairs Na+⇌Cs+, NH+4⇌K+, NH+4⇌Na+, NH+4⇌Li+, 2NH+4⇌Ca2+, 2NH+4⇌Sr2+ and 2NH+4⇌Ba2+. In all cases except those involving Ca2+ and Sr2+ reversible exchange was effected.
Richard M. Barrer, Jacek Klinowski
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Ion-exchange isotherms have been measured for synthetic mordenite involving the cation pairs Na+⇌Cs+, NH+4⇌K+, NH+4⇌Na+, NH+4⇌Li+, 2NH+4⇌Ca2+, 2NH+4⇌Sr2+ and 2NH+4⇌Ba2+. In all cases except those involving Ca2+ and Sr2+ reversible exchange was effected.
Richard M. Barrer, Jacek Klinowski
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Synthesis of mordenite nanocrystals
Microporous and Mesoporous Materials, 2004Mordenite is a zeolite that has been used as a selective adsorbent and as a catalyst. In reactions where the diffusion of reagents into the pore system is the rate-determining step, smaller particles of the catalyst improve the reaction rate. Mordenite with crystal diameter smaller than 100 nm has been prepared by the modification of different ...
Beatriz O Hincapie +4 more
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Catalytic degradation of expandable polystyrene waste (EPSW) over mordenite and modified mordenites
Journal of Molecular Catalysis A: Chemical, 2004Abstract The performance of the several different modified mordenite zeolites in the degradation of expandable polystyrene waste (EPSW) was investigated in this study. The composition of the degradation products, especially the liquid fraction was compared to understand the role of H-mordenite and the effect of its modification through framework ...
Vilas Ramdas Chumbhale +3 more
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Disilane-modified mordenite zeolites
The Journal of Physical Chemistry, 1990The effective pore size of H-mordenite zeolite can be decreased by implantation of disilyl compounds. Chemisorption of disilane at high temperature results in denser packing of the implanted entities on the external surface. This in turn enhances the pore narrowing effect.
Yongan. Yan, Etienne F. Vansant
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Redox behaviour of copper mordenite zeolite
Journal of Materials Science, 1995Fourier transform-infrared photoacoustic spectroscopy (FT-IR/PAS) and X-ray diffraction (XRD) techniques have been used to study the reduction of copper (II) oxide supported on mordenite zeolite, through the adsorption of carbon monoxide and hydrogen gases at 723 K.
Mohamed, M.M., Vansant, Etienne
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AIChE Journal, 1971
AbstractThe rates of diffusion of CH4, nC4H10, iso‐C4H10, and C4F10 into well‐characterized single crystals of sodium mordenite were studied at 25°C to 100°C., using a rapidly responding constant‐volume system. The diffusion coefficients are of the order of 10−8 to 10−9 sq. cm/sec.
Charles N. Satterfield +1 more
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AbstractThe rates of diffusion of CH4, nC4H10, iso‐C4H10, and C4F10 into well‐characterized single crystals of sodium mordenite were studied at 25°C to 100°C., using a rapidly responding constant‐volume system. The diffusion coefficients are of the order of 10−8 to 10−9 sq. cm/sec.
Charles N. Satterfield +1 more
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Multiple Equilibrium Analysis Description of Adsorption on Na−Mordenite and H−Mordenite
Journal of the American Chemical Society, 1999Adsorption isotherms are reported for Na−mordenite and H−mordenite at several temperatures with a series of gas adsorptives above their critical temperature. The data sets are analyzed with the multiple equilibrium analysis (MEA) method [Drago, R. S.; et al. J. Am. Chem. Soc. 1998, 120, 538−547. Drago, R. S.; et al. J. Phys. Chem.
Charles Edwin Webster +2 more
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