title: Kinetic plots for gas chromatography: theory and experimental verification.
abstract: Mathematical kinetic plot expressions have been established for the correct extrapolation of the kinetic performance measured in a thin-film capillary GC column with fixed length into the performance that can be expected in a longer column used at the same outlet velocity but at either the maximal inlet pressure or at the optimal inlet pressure, i.e., the one leading to an operation at the kinetic performance limit of the given capillary size. To determine this optimal pressure, analytical solutions have been established for the three roots of the corresponding cubic equation. Experimental confirmation of the kinetic plot extrapolations in GC has been obtained measuring the efficiency of a simple test mixture on 30, 60, 90 and 120m long (coupled) columns.
authors: Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussels, Belgium.
authors: Sander
authors: S
authors: Jespers
authors: Universiteit Gent, Separation Science Group, Krijgslaan 281, B-9000 Gent, Belgium.
authors: Kevin
authors: K
authors: Roeleveld
authors: Universiteit Gent, Separation Science Group, Krijgslaan 281, B-9000 Gent, Belgium.
authors: Frederic
authors: F
authors: Lynen
authors: Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussels, Belgium.
authors: Ken
authors: K
authors: Broeckhoven
authors: Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussels, Belgium. Electronic address: gedesmet@vub.ac.be.
authors: Gert
authors: G
authors: Desmet
mesh_terms: D000473:Alkanes / Q000737:chemistry / Q000302:isolation & purification; D002849:Chromatography, Gas / Q000295:instrumentation; D007700:Kinetics; D008962:Models, Theoretical; D011312:Pressure
chemical_list: D000473:Alkanes
keywords: Efficiency; Gas chromatography; Kinetic performance limit; Optimal pressure; Thin-film