When H2S is burned (flared) on a MODU, what can you expect to occur?

Correct Answer: Option B — Only 80% of the H2S will be converted to SO2 or free sulfur.

Flaring H2S gas on a MODU is an essential safety measure, but combustion is rarely 100% efficient. Operational safety standards indicate that approximately 20% of the H2S remains unconverted or transforms into intermediates, meaning unburned or partially reacted gases still present significant toxic hazards downwind.