U.S. LNG developer NextDecade plans to expand further its Rio Grande export project with a sixth train, for which it has just initiated the pre-filing process with the Federal Energy Regulatory Commission (FERC). NextDecade has already approved and is building five trains at its flagship Rio Grande LNG export facility in Brownsville, Texas. All of these trains are expected to come online by the early 2030s. The company is now seeking with the FERC further expansion at Rio Grande LNG that includes a sixth liquefaction…