Abstract
<p> <p id="x-x-spar0010"> A comprehensive two-dimensional gas chromatography (GC × GC) method for separating siloxanes from hydrocarbons has been developed using a systematic process. First, the retention indices of a set of siloxanes and a set of hydrocarbons were determined on 6 different stationary phases. The retention indices were then used to model GC × GC separation on 15 different stationary phase pairs. The SPB-Octyl × DB-1 pair was predicted to provide the best separation of the siloxanes from the hydrocarbons. The efficacy of this stationary phase pair was experimentally tested by performing a GC × GC analysis of gasoline spiked with siloxanes and by analyzing biogas obtained from a local wastewater treatment facility. The model predictions agreed well with the experimental results. The SPB-Octyl × DB-1 stationary phase pair constrained the hydrocarbons to a narrow range of secondary retention times and fully isolated the siloxanes from the hydrocarbon band. The resulting GC × GC method allows siloxanes to be resolved from complex mixtures of hydrocarbons without requiring the use of a selective detector. </p></p>
| Original language | American English |
|---|---|
| Journal | Journal of Chromatography A |
| Volume | 1360 |
| DOIs | |
| State | Published - Jul 29 2014 |
Keywords
- Retention Indices
- Organosilicon Compounds
- Hydrocarbon
- Separations
- Biogas
Disciplines
- Biochemical and Biomolecular Engineering
- Chemical Engineering
- Engineering