| Abstract Title: | Olefin Class Characterization in Gasoline-Range Samples Using Gas Chromatography - Vacuum Ultraviolet Spectroscopy |
| Abstract Type: | Oral |
| Session Choice: | Hyphenated Techniques |
| Presenter Name: | Mr Alex Hodgson |
| Co-authors: | Mr James Diekmann Mr Ryan Schonert Mr Jack Cochran |
| Company/Organisation: | VUV Analytics, Inc |
| Country: | United States |
Abstract Information :
Olefins, especially conjugated dienes, are known to cause fouling of refinery processes and to negatively impact product quality. Conjugated dienes are monitored in fluid catalytic cracking (FCC) gasolines because they are highly reactive to polymerization and plug downstream refining processes. Traditional methods for gasoline-range fuels using gas chromatography (GC) with flame ionization detection (FID) and/or mass spectrometry (MS) can struggle with olefin/naphthene differentiation, and methods for conjugated diene characterization can vary in complexity, analysis time, and accuracy. For example, diene analysis using maleic anhydride addition takes more than 3 hours to complete, does not completely react with some conjugated dienes, and can be interfered with by alcohols. Unlike FID and MS, vacuum ultraviolet spectroscopy (VUV) can differentiate olefins and naphthenes with a high degree of accuracy. Olefins – and particularly conjugated dienes – have absorbance spectra distinct from the other PIONA-class compounds, allowing for deconvolution and quantitation in complex fuel matrices.
