This news release from DOE’s National Renewable Energy Laboratory (NREL) found that 95% of the samples from 2011-12 met ASTM International fuel quality specifications… a dramatic improvement from just a few years ago:
“The survey showed a major improvement over results from previous years,” NREL Senior Chemist Teresa Alleman said. “In our 2007 survey of B100 biodiesel, less than half of the samples met quality specifications. More stringent quality requirements, along with the voluntary BQ-9000 quality management program, are among the reasons for this marked improvement.”
The report goes on to say that this improvement comes as production of the green fuel also rose dramatically, up from just under 28 million gallons in 2004 to more than 1 billion gallons in 2012.
You can read more of the survey here.