Résultat de la recherche
The physical and chemical characterization of a sulphur-impregnated active carbon, by combined adsorption and immersion techniques
A commercially available active carbon, impregnated with sulphur, has been characterized and compared to the original carbon by using adsorption and immersion techniques. The specific reaction of liquid CS2 with sulphur, following the preadsorption of various amounts of n-nonane, shows that the accessibility of sulphur decreases rapidly. It is also found that the impregnated carbon becomes hydrophilic but, in the case of SO2 adsorption, no change in adsorption capacity is detected.
Recent Developments in the Dubinin Equation
A combination of techniques—mainly immersion calorimetry and adsorption from the vapor phase—provides independent data for the assessment of micropore sizes and their distribution in relation to parameters E0 and n of the Dubinin-Astahhov (D-A) equation. It is shown that carbons described by the Dubinin-Radushkevich (D-R) equation (n = 2) present some heterogeneity, which can be expressed in terms of contributions from true molecular-sieve carbons with n = 3.