Determination of dependencies between the specific retention volumes and the parameters characterising adsorbent properties.
Propane adsorption isotherms have been chromatographically determined on active carbon for different amounts of the injected adsorbate on column. The dependencies between the specific retention volume corrected to the standard temperature (273.15 K), Vg(273), and the molar differential work of adsorption, A, have been calculated on the basis of the propane isotherms and using the retention times of the peak maxima. The obtained equations: ln Vg(273) = f1(A) and (dW/dA)T.F(C) = f2(ln Vg(273)) have been used to explain the dependency between the chromatographic peak profile and the distribution function of pore volumes filled with propane with respect to the molar differential work of adsorption at different column temperatures (303-318 K).
Grajek
Henryk
H
Institute of Chemistry, Military Technical Academy, Warsaw, Poland.
Witkiewicz
Zygfryd
Z
D000327:Adsorption; D002849:Chromatography, Gas / Q000379:methods*; D008855:Microscopy, Electron, Scanning