OMA-300 H2S Analyzer Brochure

H2S is an extremely dangerous chemical which occurs naturally in fossil fuels and is removed through refining processes. The sulfur recovery unit (SRU) of a refinery converts the H2S to elemental sulfur which can be stored or sold off. A critical point in this process is the furnace, which combusts H2S in order to sustain a 2:1 stoichiometric ratio of H2S:SO2 in the subsequent catalytic reaction. The amount of available oxygen in the furnace is carefully controlled to ensure this ratio for the next step. The efficiency of the entire SRU therefore hinges on the ability to continuously measure the required amount of oxygen (i.e. “air demand”) in the furnace.