PROPERTIES OF NICKEL STEAM REFORMING CATALYSTS
WITH SMALL MOLYBDENUM ADDITIVES
B. Stasińska, W. Gac, G. Giecko, M. Pańczyk, T.Borowiecki
Maria Curie-Skłodowska University, Faculty of Chemistry,
3 M.Curie-Skłodowska Sq., 20-031 Lublin, Poland
e-mail: beata@ hermes.umcs.lublin.pl
Steam reforming of hydrocarbons is one of the most important methods of commercial production of hydrogen or synthesis gas. One of the significant properties of a good catalyst of hydrocarbons steam reforming is its resistance to coking. The simplest manner of improving Continue Reading »
THE PECULARITY OF SORPTION OF SOME TOXIC IONS
BY ALUMINIUM HYDROPHOSPHATES PREPARED
BY SOL–GEL TECHNOLOGY
V. V. Strelko, V. A. Kanibolotsky, A. A. Zaitseva,
S. I. Meleshevich, N. I.Chubar
Institute for Sorption and Endoecology Problems,
National Academy of Sciences of Ukraine, Kyiv, Ukraine
The new sol-gel method of synthesis of aluminium hydrooxides was elaborated, in which simple and accesible chemicals - inorganic aluminium salts, acides and bases - were used, instead of traditionally used in sol-gel synthesis expensive Continue Reading »
CHEMISORPTION OF DIMETHYLCHLOROSILANE ON THE SILICA SURFACE
A. M. Varvarin, L. A. Belyakova
Institute of Surface Chemistry of National Academy of Sciences,
Kiev, Ukraine
Hydride silicas possess unique sorption and oxidation-reduction properties. Hydride silicas are recently used more often as intermediates for the synthesis of heterogeneous catalysts. The most often application of hydride silicas is the implementation of solid-phase hydrosilylation reactions of olefins and high temperature condensation of different organic chlorine-substituted compounds. The stable chemical bonds Si‑C between the s Continue Reading »
Jon-exchange ability of the synthetic ceolit
of the type NaA with a purpose
of utilization as remedies of combined action
O. I. Zaitsev, O. B. Zhukovina, V. I. Zhukovina
The National Pharmaceutical Academy
The State Research institute of the basic Chemistry
Ukraine, Kharkiv
Analysis of the pharmaceutical publications and the previous experiments showed possibilities of the receiving combined antimicrobial preparation on the basis of the synthetic ceolit NaA by ionic-exchange of cautions of natrium on the active cautions of medicinal preparation. It is known, tha Continue Reading »
The kinetics of carbon oxidation by oxygen in the presence of carbonates of alkaline metals
G. G. Tsapiuk, V. Ya. Zabuga, V. L. Budarin, V. K. Yatsimirsky
Shevchenko University, Kiev, Ukraine
The carbonates of alkaline metals represent themselves the active catalysts of carbon oxidation. There are contradictory data in the literature as to the mechanisms of their catalytic action.
In this work, the studies aimed at the kinetics of carbon oxidation in the presence of potassium and sodium carbonates have been performed.
The studies have been made by the gravimetry method in the flow-trough conditi Continue Reading »
STUDIES OF ION EXCHANGE EQUILIBRIA
AT LOW- AND HIGH-SILICON
CLINOPTILOLITES INVOLVING Na+, K+ AND Ca2+ IONS
Y. I. Tarasevich, D. A. Krysenko, V. E. Polyakov
A.V. Dumansky Institute of Colloid Chemistry and Chemistry of Water, Ukrainian National Academy of Sciences,
42 Vernadsky Avenue, Kyiv (Kiev) 03680, Ukraine
For a number of low- and high-silicon clinoptilolites possessing different SiO2:Al2O3 and (Na++K+):Ca2+ ratio in the exchange complex, taken from the deposits in Bulgaria, Georgia, Russia, Ukraine and United states, the Continue Reading »