THT odorant control in natural gas grids

Henk Top, DNV GL Oil & Gas (NL)

Natural gas should reach a warning smell (level 2) before it reaches a concentration of 20% from LEL (lower explosion limit). The presentation describes the use and experience  of mobile micro GC technology to control THT (TetraHydroThiophene) odorant concentrations inside natural gas grids. A compact mobile system was build including sampling, calibration/validation and registration. The system can be controlled by WiFi in a van or car to check different sampling locations in a grid  on a regular basis. Measured odorant concentrations  should be within limits to have a warning smell.


Pen Profile

Henk Top (1967) is a specialist in gas testing (e.g. odorisation, black powder and safety) and analysis (e.g. gas chromatography and mass spectrometry), with experience in the field of natural gases, LNG, biogas, refinery gas, exhaust gases and indoor air quality. He started his career in 1990 while he was working at the R&D department of N.V. Nederlandse Gasunie.
In the early nineties, he did research and development of NOx reduction techniques for domestic and industrial gas-fired burners. From 1995 – 2005 he did many studies and measurements used for emission reduction and energy efficiency projects at agricultural and industrial production sites in the Netherlands.
Since 2005 senior specialist gas testing and analysis for pipeline quality control and gas processing of natural gases, LNG, and biogas (physical properties, hydrocarbon dew point, sulphur content, odorisation, black powder, etc.). Auditor of custody transfer stations for gas quality (e.g. Europe and Middle – East). Radiation expert for DNV GL Netherlands. Currently working on odorisation and small scale LNG (trucks and ships).

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