Some 800,000 billion barrels per day of US ethane is currently “in rejection” or left in the natural gas stream, and this figure is expected to rise, American Ethane Co (AEC) chief executive John Houghtaling said.

He said when AEC announced its 10 million tonnes per annum export plans in 2014, the concept was seen as “crazy”. But this view has reversed since the boom in ethane production on the back of the shale gas revolution in the US.