(438a) Development and Testing of Amine-Type Scavengers for the Removal of H2s from Liquid Sour Crudes
Hydrocarbon companies are exploring the prospect of greener and more cost-efficient methods for the scavenging (i.e. chemical absorption) of H2S from crude oils. The most used non-regenerative absorbent for H2S scavenging is a class of compounds known as triazines. Triazines are typically formed from a condensation reaction between an amine and a carbonyl compound. In-line scavenging of H2S is the favored technique for producing subsea wells containing crude oils with minute H2S concentrations especially when the well is coupled to a host facility for which there is no H2S scavenging or where it is too costly to implement. This work explores the fundamental characteristics of seven common scavengers, namely through FTIR and Raman spectroscopies, to identify the molecular facets for top-performing scavengers. In particular, this work identifies which scavenger-type is best for a particular crude oil type (i.e. acidity, aqueous content, H2S content, etc.). Each of the scavengers were tested in H2S-contaminated crude oils at various conditions, including temperature and reactor stirring rates. These results will be shown along with a proper delivery system to add scavenger compounds during the filling of a rail tanker or even injection into a pipeline.