(EnergyAsia, April 5 2011, Tuesday) — Thai coal mining giant Banpu Plc expects to sell its coal at an average price of US$90 per tonne this year, up from US$74.6 a tonne last year, said CEO Chanin Vongkusolkit.This should boost sales revenue by some 40% to 90 billion baht this year  (US$1=30 baht).Coal prices have…