Sweetening

Natural gas sweetening is the process whereby hydrogen sulfide (H₂S) and carbon dioxide (CO₂) are removed from the natural gas. Both H₂S and CO₂ promote corrosion through the formation of acids in the presence of water and can cause stress cracking in the pipelines. 

To sweeten the natural gas, H₂S, along with CO₂, is reduced or removed in a contactor using an amine scrubbing process. Natural gas containing a higher concentration of H₂S flows through a contactor where the amine solution absorbs the sulfur compounds from the natural gas. “Sweet” natural gas, containing low levels of H₂S, exits the contactor.

Accurate measurement of the concentrations of both H₂S and CO₂ in the sweetening process is necessary, both at the inlet and outlet of the amine contactor.  These measurements ensure both impurities are below the tariff or contract limit prior to the natural gas being transported in a pipeline and optimizes the sweetening processes.

We provide a range of reliable, accurate solutions for natural gas sweetening applications. These provide rapid-response, low-level, interference-free detection of H₂S with no requirement for a scrubber to detect low concentrations of H₂S or CO₂. We also offer the ability to measure H₂S, carbonyl sulfide and methyl mercaptan in a single analyzer.