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2 Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2 1999

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Preparation and characterisation of effective cheap adsorbent from lignites.

Finqueneisel G., Zimny T., Weber J.V., Vogt D.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

1999

Vol. 9, nr 56

305-311

The adsorptive capacities of active carbons are essentially attributed to the internal surface area, porosity and surface reactivity. We described in this work chars obtained in one step in a rotary klin starting from two different lignites. In order to improve their adsorption capacities, a mild oxidation is proposed and evaluated. The objective of this work is to explore the feasibility of the use chars for adsorption in liquid and gaseous phases. The physical and the chemical effects of the oxidative treatment are discussed and connected to the modification of their adsorptive properties.

Comparison between Chemically and physically activated carbons by inverse gas chromatografy at infinited dilution.

Cossarutto L, Zimny T., Weber J.V.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

1999

Vol. 9, nr 56

325-331

Active carbons coming from different preparation processes were studied by means of inverse gas chromatography at infinite dilution (IGC-ID). Thermodynamics quantities, such as the free energy of adsorption or the dispersive component of the surface energy, are dependent on the carbon micropore structure. Hence IGC allows the variation of the surface properties of solids submitted to thermal and chemical tratment to be followed.