Free Isobutanol Webinar on Thursday, Sept. 13 Submitted by Whitney Emerick on September 8, 2018 - 14:06 The National Renewable Energy Laboratory (NREL) and Oak Ridge National Laboratory (ORNL) will present a free one-hour webinar for PEI members on isobutanol, the emerging vehicle fuel currently produced by Butamax and Gevo. (See June 29, 2018 TL.) Read more about Free Isobutanol Webinar on Thursday, Sept. 13