BioCNG - Sour Gas

Sour gas means any gas containing significant amounts of hydrogen sulfide (H2S). Natural gas is usually considered sour if there are more than 5.7 milligrams of H2S per cubic meter of natural gas, but this can vary by state. Sour gas is usually flared or vented, but if “sweetened” or conditioned, it could make an excellent source of biogas for use in a BioCNG alternative fuel system.