Secunda CTL is a synthetic fuel plant owned by Sasol at Secunda, Mpumalanga in South Africa. Sasol Limited is an integrated energy and chemical company based in Sandton, South Africa. The company was formed in 1950 in Sasolburg, South Africa. 

Sasol Limited is an integrated energy and chemical company based in Sandton, South Africa. The company was formed in 1950 in Sasolburg, South Africa. 

 

 

It uses coal liquefaction to produce petroleum-like synthetic crude oil from coal. The process used by Sasol is based on the Fischer–Tropsch process. It is the largest coal liquefaction plant in the world.

Secunda CTL consists of two production units. The Sasol II unit was constructed in 1980 and the Sasol III unit in 1984. 

The Sasol III Steam Plant has a 301 m (988 ft) tall chimney built by Concor, which consists of a 292 m (958 ft) high windshield and four reinforced concrete flues which make it one the tallest structures in Africa. It has total production capacity of 160,000 barrels per day (25,000 m3/d).

According to en.wikipedia