1H NMR for quantifying sulfide trapping efficiency by using 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane

Area of Science:

• Analytical Chemistry
• Environmental Science
• Chemical Engineering

Background:

• Hydrogen sulfide (H2S) is a highly toxic, corrosive gas commonly found in industrial settings like oil and gas operations and wastewater treatment.
• Effective monitoring of H2S is crucial for safety and environmental protection.

Purpose of the Study:

• To develop and validate an alternative method for monitoring and quantifying H2S trapping efficiency.
• To assess the efficacy of 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane as a sequestering agent for H2S.

Main Methods:

• Utilized 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane as a sequestering agent and sodium sulfide as the sulfide ion source.
• Employed proton nuclear magnetic resonance ((1)H NMR) spectroscopy for analysis.
• Conducted reactions at 20°C and pH 7 and 10.

Main Results:

• Observed and quantified the formation of 3,5-di(2-hydroxyethyl)-1,3,5-thiodiazinane and 5-(2-hydroxyethyl)-1,3,5-dithiozinane.
• Demonstrated that the reaction between the sequestering agent and sulfide ions is rapid under the tested conditions.
• Validated the use of (1)H NMR spectroscopy for quantifying H2S trapping efficiency.

Conclusions:

• Proton NMR spectroscopy provides a fast and effective means to quantify H2S trapping efficiency.
• 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane is an effective agent for sequestering sulfide ions.
• This method offers a viable alternative for monitoring H2S capture in industrial applications.