New developments of the THIOPAQ® process for the removal of H2S from gaseous streams
THIOPAQ® is a biotechnological process to remove H2S from refinery gases to produce elementary sulfur. In the autumn of 1999, the first THIOPAQ® process was licensed to the refinery industry for the removal and recovery of sulfur from several streams within the Alexandria Minerals Oil Company (AMOC, Egypt) grass-roots dewaxing complex. A hydrotreater offgas stream, amine regeneration gas and a spent caustic stream will be desulfurized, resulting in the recovery of 13 tons/day of high-purity sulfur. Several laboratory and pilot plants studies were performed to find an outlet for the bio-sulfur. The results of these studies are presented in this paper.