Investigation on Solubility of Hydrogen Sulfide in Molten Sulfur Using Iodometric Back Titration Method

In order to conduct laboratory studies on composition and behavior of Claus-derived molten sulfur, the examined sulfur should contain dissolved H۲S and H۲Sx with a concentration of about ۲۳۰-۲۵۰ppmw. Here, by injecting hydrogen sulfide to sulfur, a method for synthesis of molten sulfur containing hydrogen sulfide and polysulfide as a proper sample for laboratory studies is developed. The molten sulfur product was prepared by injecting the pressurized hydrogen sulfide on the surface of solid sulfur followed by further heat treatments during the time. According to the Iodometric Back Titration (IBT) analysis, final molten sulfur contained ۵۰۰-۱۱۰۰ppmw of soluble hydrogen sulfide and polysulfide components based on the initial gas pressure.

Keywords:

Molten sulfur , Gassing , Degassing , Iodometric Back Titration