Standard Practice for Determining Compressor Oil Carryover in Compressed Natural Gas Used as a Natural Gas Motor Vehicle Fuel

Importancia y uso:

5.1 Uncontrolled oil carryover from lubricated natural gas compressors can adversely affect natural gas vehicle (NGV) performance. In some instances, small amounts of oil will accumulate in vehicle pressure regulators and slow their response. It can also affect other components of the engine fueling system. Erratic engine performance, under fueling, or engine shutdown can occur. Such incidents have been reported by operators of NGV fueling stations and vehicles.

5.2 There is some vaporization of the lubrication (lube) oil that occurs due to compression of the gas. The oil vapor in CNG can be collected using a sorbent tube and quantified. Along with quantification of lube oil, this procedure can collect solids present in the gas.

5.3 These methods do not separate any solids including siloxane from the compressor oil carryover or vapor.

5.4 This practice can be applied to other gaseous samples requiring determination of compressor oil carryover provided the user’s data quality objectives are satisfied.

Subcomité:

D03.06.05

Referida por:

D8487-23

Volúmen:

05.06

Número ICS:

75.060 (Natural gas)

Palabras clave:

CNG; compressed natural gas; compressor oil; natural gas; natural gas vehicle; NGV; renewable natural gas; RNG;