Bloomberg: Mitsubishi Heavy Industries Ltd. and Mitsubishi Corp. signed an accord with Australia’s Queensland state government to study a A$4.3 billion ($3.4 billion) project to build a cleaner-burning coal-fired power plant. Under the accord with ZeroGen Pty Ltd., owned by the Queensland government, Mitsubishi Heavy and Mitsubishi Corp. will conduct a feasibility study for a 530-megawatt power station, with commercial operation slated for September 2015, the Japanese companies said in a joint …