Non-contact and accurate measuring of natural gas contaminants

 

Monitoring contaminants is critical for process optimization and gas quality.

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Hydrogen sulfide H2S in amine scrubber outlet

 

One of the first steps in a gas plant is the reduction of acid gas components. Measuring ranges starting from 0 to 10 ppmv for H2S and from 0 to 10 ppmv for H2O.

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Traditional approach

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• Lead acetate tape analyzers work but have high maintenance requirements to replace and dispose of the tapes in an environmentally safe manner

• On-line gas chromatograph take 3 – 6 minutes between measurement updates and do not sense rapid changes. OPEX are high due to consumption of carrier gas and flame fuel cylinder gases

• Broadband UV light sources and narrow band pass filters are prone to interferences from changing background concentration.

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Our solution

 

High resolution SpectraSensors' TDLAS technology eliminates errors due to interferences encountered with other spectroscopic techniques.

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Typical analytes and measuring ranges

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• Analyte: H2S - Range: 0-10 to 0-5000 ppmv

• Analyte: H2O - Range: 0-10 ppmv

• Analyte: CO2 - Range: 0-100 ppmv to 0-5%