H2S scavengers are appropriate for use at low treatment volumes and/or low H2S concentrations where conventional catalytic reduction (Claus process), chemical absorption (e.g. iron sponge, SulfaTreatTM process, zinc oxide, etc.) and physical solvents are not economical.
Common scavengers are based either on aldehyde or triazine chemistry.
H2S Scavengers - Mode of Action
- Chemicals like glyoxal or triazine derivatives react with H2S or mercaptanes to form stable, water soluble compounds that can be separated from gas or crude oil and disposed.
- Scavengers may be utilized in contacting towers or sprayed directly into the gas pipeline or oil flowline (continuous injection treatment).
- As with all chemical reactions, speed and efficiency of H2S absorption is influenced by: pH, heat, mixing, and reaction/contact time.
- Other products workon a 1:1 molar basis, meaning one molecule triazine scavenges one molecule H2S or mercaptane. NuFlo H2S 40 is more efficient depending on the conditions (pH, temp). Its mode of action is only in the water not gaseous phase.