The adsorption of simple gases begins with the formation a monolayer on pristine surface, not always followed by second or more monolayers. Subsequently, cluster cavity filling occurs, depending properties surface. characteristically different shape isotherms related to these processes allows clearly differentiate them. We analyzed argon and N2 quantitatively over entire relative pressure range...

Principle Chromatographic procedures allow a separation of substance mixtures with the aid of a stationary separating phase and a mobile phase. In gas chromatography the mobile phase is a gas. The mobile phase, to which the mixture to be separated is added, transports the substance mixture through the separation column at a constant flow rate. Interactions occur between the mobile phase and the...

A classical density functional theory (cDFT) based on the PC-SAFT equation of state is proposed for calculation adsorption equilibria pure substances and their mixtures in covalent organic frameworks (COFs). Adsorption isotherms methane, ethane, n-butane nitrogen COFs TpPa-1 2,3-DhaTph are calculated compared to results from grand canonical Monte Carlo (GCMC) simulations. Mixture investigated m...

The separation of saturated branched and linear alkanes may be investigated by selective adsorption on microporous organophilic MFI type zeolite. From the literature, adsorption equilibria of mixtures show a favourable selectivity for less branched alkanes [1]. However the separation process is significantly influenced by the transport properties. The knowledge of the transport coefficients of ...

The suitability of clay modified with sodium carboxymethyl cellulose was tested for the removal of Pb 2+ from aqueous solutions. The effect of pH on the adsorption process was investigated in the pH range from 1 to 9. Tests were conducted at different temperatures: 20 °C, 30 °C, 40 °C, 50 °C and 60 °C. The effect of initial concentration of adsorbate on lead removal was analysed using solutions...

This paper presents and develops a novel methodology to determine thermodynamic parameters of binary gas co-adsorption equilibria at given total pressure, based exclusively on binary gravimetric measurements at this same total pressure, together with single component isotherms. By “Incremental Gravimetry”, we designate a procedure in which the adsorbent sample is submitted to increments of comp...