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Areas of Expertise - Liquefied Gas (LG) Analysis


Liquefied Gas (LG) Analysis:

Liquefied Gas (LG): Include fuels and refined feedstocks, which exist as liquids when stored under pressure and are vaporized for use as fuels or for synthesis reactions. ASTM D 1835 and GPA 2140 Specs, define the required properties of LG fuel grades, NFPA Std. 58 concerns shipping/storage and odorant treatment. Examples of common LG's include:

Ethylene/Propylene/Butylene/Butadiene: Normally high purity feedstocks (99.5+%) used for many fine synthesis reactions. Trace impurities such as Hydrogen, Carbon Monoxide, Carbon Dioxide, Oxygen, Water, Acetylene, light hydrocarbons, sulfur gases & oxygenates (i.e. alcohols, aldehydes, ketones, esters) are important to monitor.
Propane-Propylene grades: Commercial (i.e. residential fuel) grade liquid propane (LP) is predominantly propane &/or propylene. HD-5 Grade (special duty engine fuel) has a more tightly defined composition that is 90+% propane, 2 - 5% propylene & lower amounts of other C2-C5 alkane/alkene hydrocarbons. Ethyl mercaptan or thiophene (tetrahydrothiophene) are typical LP odorant additives.
Butane-Propane (B-P) mixtures: Commercial grade liquid B-P mixtures are predominately used as fuels in climates & applications that do not experience low ambient temperatures.
Butane-Butylene grades: Commercial grade liquid butane is predominantly butane &/or butylene mixtures that are used as fuels in industrial applications or as residential fuels in warm climate regions.