WESTLAKE, La. — In an ambitious bet that the glut of cheap natural gas in the United States will last for many years, a South African energy company announced on Monday that it would build America’s first commercial plant to convert natural gas to diesel and other liquid fuels.
The company, Sasol, which is based in Johannesburg, has been a pioneer in a technology that has tantalized energy scientists for decades over its potential to produce liquid fuels without using oil, which has historically cost far more than natural gas.
Having already built smaller plants in South Africa and Qatar, Sasol has designed its new Louisiana plant to produce 96,000 barrels of fuel a day using its “gas to liquids,” or G.T.L., technology. It will be the second-largest plant of its kind in the world, after Royal Dutch Shell’s Pearl plant in Qatar, and will cost $11 billion to $14 billion to build.
“By incorporating G.T.L. technology in the U.S.A.’s energy mix, states such as Louisiana will be able to advance the country’s energy independence through a diversification of supply,” said David Constable, Sasol’s chief executive, at a news conference here Monday near the project’s planned location.
The facility will include a gas processing plant, a chemical plant and a refinery. All are required to perform the alchemy of converting natural gas into diesel, jet fuel and other chemical products.