Ethane

From Wikimarcellus

Ethane is a natural gas liquid (NGL) richly found in the Marcellus shale's wet gas region. Ethane burns very hot and must be removed from natural gas before it can be used to heat homes and for industry. It is removed with a cracker and produces ethylene oxide, a basic feedstock for plastic manufacturing.

There are no crackers in the Appalachian Basin, but with full development of the Marcellus shale it is anticipated that one or more crackers will eventually set up in the area.