The major emission sources in the natural gas processing industry are compressor engines, acid gas
wastes, fugitive emissions from leaking process equipment and if present, glycol dehydrator vent streams.
Compressor engine emissions are discussed in Section 3.3.2. Fugitive leak emissions are detailed in Protocol
For Equipment Leak Emission Estimates, EPA-453/R-95-017, November 1995. Regeneration of the glycol
solutions used for dehydrating natural gas can release significant quantities of benzene, toluene, ethylbenzene,
and xylene, as well as a wide range of less toxic organics. These emissions can be estimated by a
thermodynamic software model (GRI-GLYCalc ) available from the Gas Research Institute. Only the SO TM
2
emissions from gas sweetening operations are discussed here.