Toxic Gas Quantification in Exported Crude Oil via Headspace Gas Chromatography

This paper describes a new method for separation, identification and quantification of dissolved hydrogen sulfide in the exported crude oil as a dangerous gas for environment and humans. Measurement of dissolved hydrogen sulfide concentration is one of the most important parameters to price assessment of the exported crude oil. Some traditional methods (e.g. Iodimeteric) have been used for quantification of dissolved hydrogen sulfide concentration in oil industry. But owing to the interference of other active sulfur containing-compounds (e.g. Mercapthanes), those test methods are not specific for hydrogen sulfide measuring. The crude oil not only is a high complex solution, but also has very heavy compounds. Therefore, the measurement of hydrogen sulfide concentration in this liquid is very complex. Gas chromatography seems to be a simple and accurate method for these complex solutions and consequently, headspace technique can prevent from those heavy compound entrances to gas chromatograph column. Therefore, in this study, headspace gas chromatography technique has been recommended as a practical and accurate method for hydrogen sulfide quantification in the exported crude oil.

کلیدواژه ها:

Crude Oil ، Headspace Gas Chromatography ، Hydrogen Sulfide