Emerson will provide the majority of the process automation technologies, engineering, and ongoing support services based on its PlantWeb architecture under a long-term agreement.
PlantWeb includes industry-recognized control and safety systems, control valves, and measurement and analytical instruments.
Emerson said initial automation planning and engineering work will begin immediately.
Sasol expects to invest $16bn to $21bn in the two facilities.
The GTL plant will transform shale gas into diesel and other fuels, while the adjacent ethane cracker and derivatives plant will produce ethylene and other downstream derivatives.
In addition, Emerson is planning to build new service facilities and increase workforce in Louisiana along with the development of a global service center in Gonzales, Louisiana.
