Presentation Profile
Water in Liquid Petroleum Gases by GC-LUMA, Much More Can be Analyzed (Combining ASTM D2713 and D2163)
Currently Scheduled: 10/16/2024 - 8:45 AM - 9:10 AM
Room: Daffodil
Main Author
chris goss - InnotechAlberta
- Lee Marotta - Perkin Elmer
Abstract:
Dissolved water in Liquefied Petroleum Gas (LPG) can cause “freeze-up” difficulties in pressure reducing systems, leading to safety, corrosion, and operational issues in LPG distribution systems. The current industrial practice is to measure water content using the valve freeze test (ASTM D2713) however this is an indirect measurement, it requires venting of LPG which cannot be adapted to on-line analysis or process control. Venting does not measure methanol which is used to suppress the “freeze-up.” In addition, venting can be unsafe and environmentally unfriendly.
There has long been an industry need for alternative standard methods to quantitate water in LPG.
Using gas chromatographic (GC) separations and the deconvolution (spectral) power of the LUMA, there is significantly, more information that can be determined besides water. The method will quantify the amount of water, methanol (antifreeze agent), ethyl mercaptan (odorant) and hydrocarbon composition (ASTM D2163). However more information might be determined as the LUMA can also detect oxygen, carbon dioxide as well as hydrogen sulfide, which are all considered corrosive.
