SAO PAULO (Reuters) - Brazilian energy firm Cosan SA said in a securities filing on Tuesday that Raizen Combustiveis, its joint venture with Royal Dutch Shell PLC, is expected to file for an initial public offering in the next few days. Raizen will join Brazilian stock exchange B3’s segment 2 of governance, Cosan said. Reuters reported in March the company had selected banks for an IPO that may raise up to $2.25 billion. Reporting by Tatiana Bautzer; Editing by Jan Harvey Our Standards: The Thomson Reuters Trust Principles.