(EnergyAsia, January 14 2010, Thursday) — Qatar Petroleum (QP) and ExxonMobil Chemical Qatar Limited, a subsidiary of ExxonMobil Corporation, said they have agreed to jointly develop a world-scale petrochemical complex in Qatar’s Ras Laffan Industrial City. Due to start up in late 2015, the proposed complex would include the world’s largest steam cracker and polyethylene…