منابع مشابه
Densification characteristics of chromia/alumina castables by particle size distribution
The quality of the refractories applied on integrated gasification combined cycle should be a key factor that affects both the reliability and the economics of gasifier operation. To enhance the workability of chromia/alumina castables, three types of ultrafine alumina powder were added to improve the workability. Densification behavior of such castables in the presence of ultrafine alumina was...
متن کاملReaction Kinetics on Heterogeneous Model CatalystsThe CO Oxidation on Alumina-Supported Pd Particles
We have employed multimolecular beam techniques to study the transient and steady-state kinetics of the CO oxidation on aluminasupported Pd model catalysts as a function of particle size and surface structure. The model systems were prepared under UHV conditions on a well-ordered alumina film on NiAl(110) and were previously characterized with respect to their geometric and electronic structure...
متن کاملOxidation of Pdn (n=1–7, 10) clusters supported on alumina/NiAl(110)
First-principles theoretical investigations on the oxidation of Pdn n=1–7, 10 clusters deposited on alumina/NiAl 110 have been carried out using a gradient-corrected density-functional approach. Our studies indicate that the free Pdn clusters are compact and maintain their compact structures when deposited on the surface, undergoing only small relaxations of the Pd-Pd distance. The clusters bin...
متن کاملMicrowave-Assisted Oxidation of Alcohols Using Wet Alumina Supported Ammonium Chlorochromate in Solventless System
Ammonium Chlorochromate in Solventless System Majid M. Heravi* and Maryam M. Aghayan Chemistry and Chemical Engineering Research Center of Iran. P.O. Box 14335-186, Teheran, Iran. Fax: 0098(21) 8037185, E-mail: [email protected] Z. Naturforsch. 54b, 815Ð817 (1999); received December 2, 1998 Oxidation, Alcohols, Carbonyl Compounds, Wet Alumina, Solventless System, Ammonium Chlorochromate A simp...
متن کاملThe thermal diffusivity and conductivity of transformation-toughened solid solutions of alumina and chromia
The thermal diffusivity of a series of solid solutions of alumina and chromia transformation toughened with a dispersed phase of unstabilized zirconia was measured by means of the laser-flash method from room temperature to 1400 ~ C. It was found, in general, that the thermal diffusivity could be decreased significantly by the combined effects of solid solution alloying, microcracking and by th...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1957
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.30.868