Some exciting new feedstocks for biofuels are on the horizon while development of existing sources is moving ahead, according to Boeing MD-Environmental Strategy Billy Glover. A new--to-aviation potential feedstock is tallow, or animal fat. Tallow (triglyceride) has been used for years as a raw material for biodiesel and as a metal lubricant. A significant amount of tallow goes to waste and it is "a significant feedstock. We are talking about large quantities," Glover said. ...

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