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排序方式: 共有55条查询结果,搜索用时 31 毫秒
1.
P. V. Snytnikov K. V. Yusenko S. V. Korenev Yu. V. Shubin V. A. Sobyanin 《Kinetics and Catalysis》2007,48(2):276-281
The performance of a Co-Pt powder and of Co-Pt catalysts supported on γ-Al2O3 and on the graphite-like carbon material Sibunit in selective CO oxidation in hydrogen-containing mixtures is considered. Fine particles of metal-metal solid solutions and intermetallides were obtained by the decomposition of a Co- and Pt-containing double complex salt in a hydrogen atmosphere at ~400°C. As compared to their Pt and Co monometallic counterparts, the bimetallic catalysts are more active and allow the CO concentration in hydrogen-containing mixtures to be reduced from 1 to 10?3 vol %. This effect is likely due to the formation of bimetallic particles of a Co-Pt solid solution on the support surface. 相似文献
2.
V. A. Sobyanin G. K. Boreskov A. R. Cholach A. P. Losev 《Reaction Kinetics and Catalysis Letters》1985,27(2):299-304
Adsorption of O2 over Pt(111), (110) and (100) at 80 K has been studied by thermodesorption mass-spectrometry. The results indicate the formation of chemisorbed molecular oxygen species and the influence of the surface structure of platinum on the low-temperature adsorption of oxygen.
- O2 80 Pt(111), (110), (100). . .相似文献
3.
Kinetics of ammonia decomposition and adsorption of reactants on a polycrystalline rhodium wire have been studied by thermal desorption and mass-spectrometric methods. Qualitive discussion of the mechanism of ammonia interaction with rhodium is presented.
- . .相似文献
4.
The forms of oxygen adsorbed on Pt(110) are characterized using Electron Energy loss Spectroscopy (EELS).
Pt(110).相似文献
5.
P. V. Snytnikov A. I. Stadnichenko G. L. Semin V. D. Belyaev A. I. Boronin V. A. Sobyanin 《Kinetics and Catalysis》2007,48(3):448-456
The copper-cerium oxide catalysts were characterized using a set of physicochemical techniques including in situ FTIR spectroscopy, XPS, and XRD. It was found that copper segregated on the surface of cerium oxide and its states were labile and dependent on catalyst pretreatment conditions. Copper in a dispersed state was responsible for the reaction of CO oxidation in the presence of H2 on the copper-cerium oxide catalysts. It is likely that this state of copper was composed of two-dimensional or three-dimensional surface clusters containing Cu+ ions. 相似文献
6.
A. R. Cholach V. A. Sobyanin V. V. Gorodetskii 《Reaction Kinetics and Catalysis Letters》1981,18(3-4):391-396
The adsorption and steady-state decomposition of ammonia on rhenium has been studied. A mechanism for the interaction of ammonia with the Re surface is suggested.
. .相似文献
7.
One of the most important directions of higher education reformation requires a combination of education, scientific research, and business, which is successfully implemented by Novosibirsk State University. The educational process at the university includes students’ research work aimed at solving applied problems and interacting with business structures, which contributes to training of practice-oriented professionals. 相似文献
8.
S. Freni N. Mondello S. Cavallaro G. Cacciola V.N. Parmon V.A. Sobyanin 《Reaction Kinetics and Catalysis Letters》2000,71(1):143-152
A two-layer fixed-bed catalytic reactor for hydrogen production by steam reforming of ethanol is proposed. In this reactor ethanol is first converted to acetaldehyde over a Cu-based catalyst and then acetaldehyde is converted to a hydrogen-rich mixture over a Ni-based catalyst. It is shown that the use of such type of reactor prevents coke formation and provides hydrogen yields closed to equilibrium. 相似文献
9.
M. M. Zyryanova P. V. Snytnikov Yu. I. Amosov S. A. Ven’yaminov E. Z. Golosman V. A. Sobyanin 《Kinetics and Catalysis》2010,51(6):907-913
The screening of commercial nickel catalysts for methanation and a series of nickel catalysts supported on CeO2, γ-Al2O3, and ZrO2 in the reaction of selective CO methanation in the presence of CO2 in hydrogen-containing mixtures (1.5 vol % CO, 20 vol % CO2, 10 vol % H2O, and the balance H2) was performed at the flow rate WHSV = 26000 cm3 (g Cat)−1 h−1. It was found that commercial catalytic systems like NKM-2A and NKM-4A (NIAP-07-02) were insufficiently effective for the
selective removal of CO to a level of <100 ppm. The most promising catalyst is 2 wt % Ni/CeO2. This catalyst decreased the concentration of CO from 1.5 vol % to 100 ppm in the presence of 20 vol % CO2 in the temperature range of 280–360°C at a selectivity of >40%, and it retained its activity even after contact with air.
The minimum outlet CO concentration of 10 ppm at 80% selectivity on a 2 wt % Ni/CeO2 catalyst was reached at a temperature of 300°C. 相似文献
10.