PHASE TRANSFORMATION ON Ni-CATALYST SURFACE IN CO CATALYTIC OXIDATION
V. K. Yatsimirsky, V. L. Budarin, V. Y. Diyuk
Shevchenko University, Chemistry departement,
Volodimirska 64, Kyiv, 01017, UKRAINE
E-mail: yats@chem.univ.kiev.ua
It is known that there are two mechanisms of catalytic oxidation of CO on NiO. The shift from one mechanism to the other occurs at 623-673K. The nickel Curie point (633K) is occurs in the same temperature range.
The reaction of CO catalytic oxidation on NiO and the reaction of NiO reduction by CO were studied in a closed apparatus with circulat Continue Reading »
Heterogenized acetylacetonates palladium as catalysts of hydrogen and carbon monoxide reaction oxidation
V. K. Yatsimirsky, O. Yu. Boldyreva, L. P. Oleksenko, E. S. Yanovskaya
Shevchenko Kiev University Vladimirskaya Str. 64, 252033 Kiev,
Ukraine, Kiev, Ukrain
е-mail: yats@chem.univ.kiev.ua
It was earlier shown, that immobilized on the silica surface acetylacetone complexes of platinum show higher catalytic activity in hydrodgen and carbon monoxide oxidation , than platinum containing catalysts obtained by impregnation.
The results of catalytic activity investegation of fixed palladium Continue Reading »
THE STUDIES OF ADSORPTION AND TOTAL HETEROGENEITY PROPERTIES OF SOLID SURFACES BY MEANS OF THE THERMAL ANALYSIS
P. Staszczuk
Department of Physicochemistry of Solid Surface, Faculty of Chemistry
Maria Curie-Sklodowska University
M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland
Estimation of adsorption and porosity parameters is an important problem in the characterization of material sorption properties. This problem has been studied by means of classical adsorption, chromatography, spectroscopy, sorptometry and porosimetry. The equilibrium adsorption isotherms are usually used to Continue Reading »
Adsorption of Cadmium on Acid-Modified Transcarpathian Clinoptilolite
V. O. Vasylechko, G. V. Gryshchouk, Yu. B. Kuz\’ma, V. P. Zakordonskij,
L. O. Vasylechko, L. O. Lebedynets, M. B. Kalytovs\’ka
Ivan Franko National Univrsity of L\’viv, L\’viv, Ukraine
The hydrogen forms of zeolites considerably differ from the non-modified zeolites by the adsorption properties. During the treatment of the zeolites by the acid on the first stage cations move of from the exchange positions. The next stage is characterized by dialuminizing the frame without its visible change. On the closing stage the frame is destroye Continue Reading »
CORRELATION BETWEEN ICE-FORMATION ACTIVITY OF SUBSTANCES AND THE STRUCTURE OF HYDRATE SHELLS OF THEIR CRYSTALS
A.V. Turov1, V.V. Turov, and A.V. Arkharov 1
Institute of Surface Chemistry of the National Academy of Science,
Pr.Nuki 31, 252022 Kyiv, Ukraine, e-mail vtur@uninet.kiev.ua
1Department of Chemistry, Taras Shevchenko University
Vladimirska St. 60, Kyiv, Ukraine
At present, seeding of ice-nucleation agents (INA) into clouds is considered to be the only applicable method to diminish damage caused by hails, to dissipate clouds and mists over airport areas, an Continue Reading »
RADIOCHEMICAL INVESTIGATION
OF HEAVY ELEMENTS NUCLEUS FISSION
FRAGMENTS IN WATER – titanium
phosphate SYSTEM
H. V. Vasilieva1, V. V. Strelko2, V. S. Kuts2
1Uzhgorod State University,
294000, Uzhgorod, Kapitulna, 9
2ISPE, 03680 Kyiv-164, General Naumov st., 13
Now, the problems connected to clearing of drinking water, air, waste water from contamination, in particular, from radionuclides, are most actual. For this purpose different adsorbents are widely used, as well as search and investigations of new methods of sorptive possibilities have practical significan Continue Reading »