Hydrogen Sulfide (H2S) is a chemical compound comprised of one Sulfur Atom and two Hydrogen Atoms. It is a colourless, extremely poisonous gas that reeks of rotten eggs. H2S is formed when bacteria breaks down organic matter and is found in natural oil and gas deposits. Hydrogen Sulfide is highly corrosive and renders some steels brittle, leading to sulfide stress cracking which can lead to damage to operational equipment. Natural gas producers, gas processors and pipeline operators measure H2S to protect equipment and to conform to buyer specifications and regulatory limits. Sometimes, H2S concentration is used as a feedback parameter to control and optimize sweetening and sulfur recovery processes. Due to the toxic and corrosive properties of Hydrogen Sulfide and its presence in natural gas, it is imperative to measure and control the concentration levels of this compound in natural gas pipelines.
A variety of technologies are available for the measurement of H2S and Total Sulfur in Natural Gas; the most commonly used methods in the natural gas industry will be discussed in this presentation along with a brief description of the advantages and disadvantages of each. We will also talk about methods of validating the health and accuracy of measurement equipment in the field.