Thailand’s PTT Plc will set up a joint venture with its petrochemical subsidiaries, National Petrochemical Plc (NPC), Thai Olefins Plc (TOC) and Aromatics (Thailand) Plc (ATC), to build a 2.4-billion-baht central utilities project. (US$1=40 baht). The project will produce electricity and generate steam from natural gas to sell to its shareholders and shareholders’ affiliates as…