Environmental catalysis studied by the reversed-flow gas chromatography - Measurements, mechanism and models

A kind of pertubation chromatography known as reversed-flow gas chromatogra phy has been used to measure physicochemical constants among which binary i sotherms and adsorption-desorption as well as reaction rate constants of 21 heterogeneous systems including TiO2 or PbO or Fe2O3, as a solid and a bin ary gas system. The last one is comprised of NO2 and an aliphatic or aromat ic hydrocarbon: C2H6, C2H4, C2H2, C3H6, 1-C4H8, C6H6, C6H5CH3. The precisio n and accuracy of the method are discussed. A brief outline of the theory u nderlying adsorption on solids is given. (C) 1999 Elsevier Science B.V. All rights reserved.