Adsorption of aliphatic and cyclic C6 hydrocarbons on Silochrome C-120, modified with nickel and copper nanoparticles

Abstract

The study of nanostructures and nanomaterials is one of the most modern sections of the natural
sciences. Nanoparticles of nickel and cooper have been obtained by the levitation-jet method. According to
the data of transmission electron microscopy, nanoparticles have a spherical shape and their size ranging
from 50 to 200 nm. The adsorption properties of nickel and copper nanoparticles for aliphatic and cyclic hydrocarbons with six carbon atoms differing by the presence and position of double bonds were studied.
The experiment was performed on a gas chromatograph TRACE GC with a flame ionization detector.
Also the constants and heats of adsorption of the investigated hydrocarbons on an adsorbent containing
nickel and copper nanoparticles were calculated. Also the heats of specific interactions were determined. It is
shown that the adsorption heats on adsorbents containing Ni and Cu nanoparticles differ, and on the adsorbent containing Cu the differences between the heats of adsorption are more pronounced for linear hydrocarbons of hexene-1 and hexyne-1, as well as for benzene. The graph of the enthalpy-entropy compensation dependence for the sorbent with Cu differs by a wide range of values of both the entropies and the adsorption heats of the studied sorbates, suggesting that the adsorbent Cu/Silochrome C-120 is more selective with respect to the sorbates studied than Ni/Silochrome C- 120. Using the quantum chemical study, it was determined that the difference in the heats of adsorption for the isomers of CHD-1.3 and CHD-1.4 is due to the difference in the conformations of these molecules.