Room temperature imidazolium-based ionic liquids as scavengers for hydrogen sulfide removal of crude oil

Determination of H2S amounts in crude oil was performed by a precise method instead of UOP163 that were developed in our pervious works. Evaluation of ILs and scavengers were done by two ways. The first one was based on variable concentration of ILs as the scavenger (dynamic method), and the second one was based on a constant concentration of the scavenger during H2S removal process (static method). In the static method, design of experiments was performed for all three tested ILs and three parameters such as time, temperature, and dosage (injection volume) of ILs were investigated. A wide range of time and temperature was also studied according to operating conditions in petroleum terminals.The dose of ILs was obtained from the dynamic method. According to the obtained results, these ILs had a significant effect on H2S reduction in crude oil, so that H2S concentration in some conditions was less than 1ppm