Industry Resources Guidelines

The RFA's "Fuel Ethanol Industry Guidelines, Specifications and Procedures" is a compilation of the key technical aspects of fuel grade ethanol and its traditional application as a fuel component, based on the collective experience and expertise of RFA member companies. It is designed to serve as a condensed technical reference for ethanol producers, blenders, and other interested parties.

For blenders of E85, the RFA has produced a similar guidelines and specifications manual, which can be accessed here.

The following item is an addition to the Guidelines document:

For more than 20 years, the RFA has recommended that fuel ethanol producers and importers add a corrosion inhibitor to fuel ethanol. The corrosion inhibitor should be included at a treat rate sufficient to provide corrosion protection comparable to that of other available motor fuels while protecting the transportation distribution system from corrosion concerns. RFA has amended this publication practice to reflect improved information, transitioning to an evaluation protocol that will allow each ethanol manufacturer to address their fuel’s corrosivity while optimizing the treatment addition and costs. This protocol should be considered a transition step as additional information becomes available on the corrosion potential of motor fuels, primarily fuel ethanol.  A copy of the protocol can be found here.

Prior to publication of this evaluation protocol, the RFA used less stringent criteria focused primarily on the NACE test. RFA then published a list of additives effective in meeting the previous criteria. To allow time for additive manufacturers to complete and submit new test data using this new evaluation protocol, a grandfathering clause has been included in the Evaluation Protocol to mitigate any corrosion concerns while the industry transitions to the new evaluation technique.   Additives previously listed should be grandfathered as meeting the criteria of these guidelines for the period of one year from the date of this publication. The last list of effective additives can be found here.

NOTE: While the RFA does not endorse any additive or recommend one over another, we have listed and on occasion have published references to corrosion inhibitors that have been demonstrated to us as sufficiently effective to be acceptable for use. We are discontinuing this type of publication and offering this guidance for evaluating the effectiveness of corrosion inhibitors.

Crude to Ethanol Conversion Practice

The RFA Crude to Ethanol Conversion Practice Guidelines were developed to assist in the cleaning of crude oil tankcars returning to denatured fuel ethanol service. Proper transportation procedures are critical to ensuring the denatured fuel ethanol remains on specification and fit for purpose through delivery activities.  These guidelines should be used when transportation equipment has been used to deliver other commodities, such as crude oil and other unrefined products that could contaminate denatured fuel ethanol without proper cleaning and inspection.