The ability to move biodiesel in pipelines versus truck or rail is considered essential to lower costs and advance biodiesel into the mainstream, but contamination of jet fuel with fatty acid methyl esters (FAME) shipped in the same line has impeded progress. The ASTM jet fuel spec has traditionally been unforgiving, only allowing 5 parts per million FAME concentration. Years of work testing higher limits is paying off though, as ASTM recently approved increasing the allowable concentration of trace FAME in jet fuel from 5 to 50 ppm—an action that awaits official publication in the updated jet fuel standard.
Read more:http://www.biodieselmagazine.com/articles/290143/moving-biodiesel-in-the-pipeline-sequencing-matters