Olefin content in refined gasolines needs to be kept low in order to prevent deposits from forming in fuel systems. These deposits will decrease the efficiency of engines or even prevent them from starting. Olefins as a class are reactive species – conjugated diolefins especially so – and will polymerize in high enough concentrations. Traditional methods to measure olefins, such as ASTM D1159 (bromine number by titration) and UOP-326 (maleic anhydride) are archaic, inefficient, and widely variable in both accuracy and precision. Even more advanced techniques like detailed hydrocarbon analysis (DHA) are not without their own issues. On the other hand, GC-VUV uses the unique absorbance spectra of compounds and the absorbance features characteristic for each class of compounds (e.g. paraffins, olefins, aromatics) to accurately and repeatably determine PIONA values, which include olefin content, for gasoline-range fuels.
- Accurately measuring olefin content is vital to fuel refiners; hear from Jean-Francois Borny on his use of ASTM D8071 and the positive effect it has had on throughput and accuracy in his lab.
- Traditional methodologies are outdated and riddled with problems that impact accuracy, precision, and efficiency.
- GC-VUV can identify and quantitate olefins even when co-eluting with naphthenes of the same molecular weight.
- Conjugated diolefins are spectrally distinct from all other PIONA compounds, allowing for ease of detection and quantification in gasoline.
This Webinar is presented in conjunction with McDermott Technology — Jean-Francois Borny and PetroIndustry News.