Testing LPG for sulphur compounds

Jon Lawson

The Chromatotec Group is entering into the world of liquid sample analysis through the development of a simplified enhanced sampling system specifically designed to extract representative samples from the liquid phase. 

The extracted liquid sample is vaporised and injected in continuous mode into the column of the auto-GC analyser with speciation of more than 16 sulphur compounds or 123 Volatile Organic Compounds (VOCs) according to the configuration type.

Considering sulphur compounds approach, H2S, mercaptans such as tert-butyl mercaptan (TBM), dimethyl sulphide (DMS) and/or Total Sulphur (TS) can be analysed in Liquid Propane Gas (LPG), Liquified Natural Gas (LNG) and other liquid samples such as crude oil, diesel, fuel, oil, water and condensates at very low concentration levels (ppb and/or ppm) in automatic routine mode.

This is very useful to control the effectiveness of the odourisation process of LPG as it is usually odourised with DMS and TBM to alert in case of leakage. Chromatotec’s liquid valve allows the analyses directly from the liquid phase to overcome the problem of lack of uniformity due to the different boiling points of the species. 

It is available with a dedicated configuration for safe and hazardous areas: ATEX, IECEx and CSA international certifications for its application in refineries and petrochemical plants.


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