Hydrogen sulfide (H2S) is a common but dangerous compound that is often found in natural gas wells.  When the concentration of H2S exceeds 5.7 milligrams/m3, the gas stream is referred to as Sour Gas.  This gas must be treated before it can be used in pipelines or plants. Hydrogen sulfide is particularly dangerous, as it is toxic at low levels.  The gas has a characteristic … [Read more...]