Hydrogen sulphide (H2S) is most commonly the predominant volatile species found in produced hydrocarbons whilst mercaptans (RSH) are typically the second most prevalent volatile species.
The main issues resulting from the presence of these compounds are:
- Toxicity – these compounds are highly toxic even at low concentrations.
- Corrosion – H2S has the potential to cause corrosion issues if the incorrect grade of steel is used.
- Poisoning – of petrochemical catalysts.
Qa3 routinely quantify H2S, RSH and COS in both hydrocarbon gases and liquids.
For more comprehensive sulphur speciation, depending on geographical location and concentration of sulphur compounds, Qa3 can perform on-site sampling of gases and liquids for subsequent full sulphur speciation in a UK laboratory facility.