Preparation and Study of Porous Uranium Oxides as Supports for New Catalysts of Stream Reforming of Methane Full article
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Journal of Nuclear Materials
ISSN: 0022-3115 |
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| Output data | Year: 1995, Volume: 218, Number: 2, Pages: 202-209 Pages count : 8 DOI: 10.1016/0022-3115(94)00433-1 | ||
| Tags | OXIDATION; ENERGY | ||
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Abstract:
We describe the method of synthesis of the porous uranium oxides (U3O8 and UO2) with specific surface area as high as 10–15 m2/g. Physico-chemical structure and properties of these materials were studied by X-ray diffraction, scanning electron microscopy and adsorption techniques. Porous U3O8 was used as a support for Ni- and Ru-catalysts for steam reforming of methane for new ICAR-process of direct nuclear-to-chemical energy conversion (Int. J. Hydrogen Energy 18 (1) (1993)) Catalytic activity as a function of the metal (Ni or Ru) content, temperature and contact time was studied in non-gradient catalytic reactor at P=1 atm and T=600–780°C. The catalysts studied were shown to be very active in methane reforming by steam and allow to reach at these conditions the hydrogen production rate as high as 17–18 n cm3/s per 1 gram of the catalyst. The reaction rate obeys the law r=k0 exp(−Ea/RT)(pm-pm∗), where pm is a partial pressure of methane, pm∗ is close to the equilibrium pressure of methane at temperature T. The activation energy Ea was found to be 54 kJ/mol for Ru/U3O8 catalysts. To reduce the expected contamination of the produced syn-gas by radioactive products of nuclear splitting under application in the ICAR process we build up a thin oxide (MgO, Al2O3) layer, coating the porous uranium particle. The results of the coating study are also presented.
Cite:
Gordeeva L.G.
, Aristov Y.I.
, Moroz E.M.
, Rudina N.A.
, Zaikovskii V.I.
, Tanashev Y.Y.
, Parmon V.N.
Preparation and Study of Porous Uranium Oxides as Supports for New Catalysts of Stream Reforming of Methane
Journal of Nuclear Materials. 1995. V.218. N2. P.202-209. DOI: 10.1016/0022-3115(94)00433-1 WOS Scopus РИНЦ ANCAN OpenAlex
Preparation and Study of Porous Uranium Oxides as Supports for New Catalysts of Stream Reforming of Methane
Journal of Nuclear Materials. 1995. V.218. N2. P.202-209. DOI: 10.1016/0022-3115(94)00433-1 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | May 19, 1994 |
| Accepted: | Sep 28, 1994 |
| Published print: | Feb 1, 1995 |
| Published online: | Aug 9, 2000 |
Identifiers:
| Web of science: | WOS:A1995QJ34400012 |
| Scopus: | 2-s2.0-0012119569 |
| Elibrary: | 30839634 |
| Chemical Abstracts: | 1995:381091 |
| Chemical Abstracts (print): | 122:164030 |
| OpenAlex: | W2084418405 |