Výsledky vyhledávání - "Radamis B. Fahim"

Low-temperature adsorption of oxygen on calcined chromia: IR spectroscopic and sorptiometric evidence for oxygen-assisted topochemical reduction of surface chromate species

Autor: Norman Sheppard, Radamis B. Fahim, Mohamed Abdel-Khalik, Mohamed I. Zaki, Nasr E. Fouad

Publikováno v: Applied Catalysis A: General. 265:229-235

The evolution with calcination of chromia samples of catalytic interest, prepared from gels with or without added ammonium nitrate, has been studied by thermogravimetry (TG) and differential thermal analysis (DTA). The low-temperature (77 K) adsorpti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c457758bd3e17e163c39eb9d4426639
https://doi.org/10.1016/j.apcata.2004.01.022

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Infrared spectroscopic studies of the reactions of alcohols over group IVB metal oxide catalysts. Part 3.—Ethanol over TiO2, ZrO2and HfO2, and general conclusions from parts 1 to 3

Autor: Mohamed I. Zaki, Gamal A.M. Hussein, Norman Sheppard, Radamis B. Fahim

Publikováno v: J. Chem. Soc., Faraday Trans.. 87:2661-2668

The dehydrogenation and dehydration reactions of ethanol over TiO2, ZrO2 or HfO2 catalysts has been monitored in the gas phase and on the surfaces by infrared spectroscopy. The reaction pathways closely parallel those of methanol reported in the prev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49ba48acbe1b73f64fe2f3cc0cdb860a
https://doi.org/10.1039/ft9918702661

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Infrared spectroscopic studies of the reactions of alcohols over group IVB metal oxide catalysts. Part 2.—Methanol over TiO2, ZrO2and HfO2

Autor: Radamis B. Fahim, Mohamed I. Zaki, Gamal A.M. Hussein, Norman Sheppard

Publikováno v: J. Chem. Soc., Faraday Trans.. 87:2655-2659

Infrared spectroscopy has been used to analyse the gas-phase reaction products and the related adsorbed species obtained between room temperature and 400 °C from the dehydrogenation/dehydration reactions of propan-2-ol over a series of differently c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48abd47013a9d402a73538f1f75ab8c1
https://doi.org/10.1039/ft9918702655

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Infrared spectroscopic studies of the reactions of alcohols over group IVB metal oxide catalysts. Part 1.—Propan-2-ol over TiO2, ZrO2 and HfO2

Autor: Gamal A. M. Hussein, Norman Sheppard, Mohamed I. Zaki, Radamis B. Fahim

Publikováno v: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases. 85:1723

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c2e90a146bf456a505f0a9b18df6be80
https://doi.org/10.1039/f19898501723

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Water-vapour uptake and electrical conduction in chromia

Autor: Nabiel H. Yacoub, Radamis B. Fahim, Mohamed I. Zaki

Publikováno v: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases. 78:2721

Chromia was prepared by heating in air, at 200 °C for 5 h, the thermal decomposition product of CrO3. The rate of the adsorption of water on the oxide was followed gravimetrically. An equation of the Elovich type was obtained dq/dt=k′p0.6 exp (–

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ebea5bcd9188a8cf3dbc30f2c3d4ad06
https://doi.org/10.1039/f19827802721

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