LEADING coal producer Inner Mongolia Yitai Coal Co Ltd has gained approval for a 29.1 billion yuan (US$4.2 billion) coal-to-liquids (CTL) project in Inner Mongolia Autonomous Region. Once completed, the project is expected to produce 2.15 million tonnes of diesel, naphtha, liquefied petroleum gas and liquefied natural gas, as well as 157,700 tonnes of other chemical products.