Environmental catalysis studied by the reversed-flow gas chromatography

Time-resolved gas chromatography applied to submonolayer adsorption

“…Thus, by means of the adsorption-desorption constants the reversible phenomena of adsorption-desorption, within the gas-solid boundaries, was studied on a quantitative basis while through a third kinetic constant any irreversible phenomenon were investigated. Thus, the characterization of many heterogeneous surfaces through the above mentioned kinetic constants was achieved [4][5][6][7].…”

Physicochemical characterization of interfaces

“…The RF-IGC method has been applied many times in the past for the investigation of solid surface properties regarding adsorption, desorption, and surface chemical reaction or of kinetic constants of many homogeneous or heterogeneous reactions [5][6][7][8][9][10][11][12][13][14][15][16]. This method has been applied recently for the measurement of some local parameters concerning adsorption energies, ε, with respect to time [15,17,18], local monolayer capacities, c * max , that is, the maximum adsorbed concentrations of analyte A on the collection of the adsorption sites i being active at time t [15,17], and local adsorption isotherms, θ i (p, T , ε) [15][16][17].…”

Time-resolved physicochemical characterization of MgO, SiO2, Cr2O3 and CdS in the presence of n-heptane

“…The reversed-flow gas chromatography (RF-GC) [3][4][5] is a version of inverse gas chromatography (IGC) able to overcome most difficulties in the experimental and theoretical field. It seems that RF-GC offers a new pathway to the determination of kinetic parameters [6][7][8], of mass transfer coefficients [9], of adsorption energies, and local isotherms of gaseous substances on heterogeneous solid surfaces [10][11][12][13][14][15] etc. The term "local" means with respect to time, i.e.…”