Pioneers of Adsorption Science 3. Professor A. V. Kiselev

A short account is given of the life and work of Andrej Vladimirovich Kiselev (1908–1984). Kiselev was born and educated in Moscow, Russia. He was appointed assistant professor in the M.V. Lomonosov Moscow State University in 1943 and became professor of physical chemistry in 1951. Thereafter, he directed the work of two large groups of research scientists, in laboratories of the M.V. Lomonosov Moscow State University and the Institute of Physical Chemistry of the USSR Academy of Sciences. Kiselev's prodigious research output, over a period of about 30 years, was of great international importance and included theoretical and experimental studies on the specificity of physical adsorption, chromatography and the surface properties of carbons, oxides and zeolites

Impact of potential models on adsorption of linear molecules on carbon black

In this paper, we investigate the effects of potential models on the description of equilibria of linear molecules (ethylene and ethane) adsorption on graphitized thermal carbon black. GCMC simulation is used as a tool to give adsorption isotherms, isosteric heat of adsorption and the microscopic configurations of these molecules. At the heart of the GCMC are the potential models, describing fluid-fluid interaction and solid-fluid interaction. Here we studied the two potential models recently proposed in the literature, the UA-TraPPE and AUA4. Their impact in the description of adsorption behavior of pure components will be discussed. Mixtures of these components with nitrogen and argon are also studied. Nitrogen is modeled a two-site plus discrete charges while argon as a spherical particle. GCMC simulation is also used for generating simulation mixture isotherms. It is found that co-operation between species occurs when the surface is fractionally covered while competition is important when surface is fully loaded

Isotherm and heat of adsorption in porous solids with defective pores-adsorption of argon and nitrogen at 77K in Saran activated carbon

The isotherm and isosteric heat of a porous solid are studied in terms of the local isotherms and isosteric heats of individual pores with defective walls, rather than graphitic walls as commonly assumed in the literature. We point out the incorrect formulas that have been used in the literature, and present a correct formula to calculate the isosteric heat for a porous solid. The correct formula is illustrated with a direct Monte Carlo ( MC) simulation of systems of two pores of different sizes, and finally we apply our theory to experimental data of argon and nitrogen adsorption at 77K on S600H and S84 Saran charcoals to derive their pore size distributions ( PSD). We show that the PSD derived from the fitting either the isotherm only or the heat curve only may not be reliable. It is necessary to utilize both the isotherm and heat curves in the derivation of a more reliable PSD. We also show that it is essential to use defected walls of carbon pores to model adsorption in pores as the model using graphitic walls can not describe isotherm and heat of adsorption adequately