Scientists suggest quantum control of atoms may make fusion energy production more efficient
5G Automotive Association and European Automotive Telecom Alliance to cooperate on connected and autonomous driving

Senate bill would enable sales of E15 and higher ethanol blends year round; RVP waiver

US Senators Deb Fischer (R-Neb.), Joe Donnelly (D-Ind.) and Chuck Grassley (R-Iowa) have introduced the Consumer and Fuel Retailer Choice Act. The bill would amend the Clean Air Act to extend the Reid vapor pressure (RVP) waiver to ethanol blends above 10%. This would increase market access opportunities for higher blends of ethanol by allowing retailers across the country to sell E15 and other higher-ethanol/gasoline fuel blends year-round, the Senators said.

RVP is a common measure of and generic term for gasoline volatility. Each year, the Environmental Protection Agency (EPA) regulates RVP for gasoline and gasoline-ethanol blended during the summer ozone season from 1 June until 15 September. The purpose of the regulation is to reduce evaporative emissions of volatile organic compounds (VOC) that contribute to ground-level ozone.

During these months, gasoline RVP may not exceed 9.0 psi in “volatility attainment areas” or 7.8 psi in “non-attainment areas.” However, EPA currently provides a 1.0 psi RVP allowance (the waiver) for gasoline containing ethanol at 9 to 10 vol %—i.e., the ethanol blend can exceed the applicable standard by 1.0 psi. This amount corresponds approximately to the increase in RVP when 10% ethanol is splash-blended with gasoline. Absent the waiver, the underlying gasoline blendstock would require a lower initial RVP to stay below the statutory maximum. A lower RVP blendstock would be more expensive.

In June 2011, EPA approved blends of 15 vol % ethanol in gasoline for use in model year 2001 and newer passenger cars, light-trucks and medium-duty vehicles. However, the current ethanol RVP waiver does not apply to the higher blend percentage.

At that time, EPA noted that the impact of E15 on overall evaporative emissions, including both immediate and durability-related, would not cause or contribute to light-duty vehicles exceeding applicable evaporative emissions standards, so long as the final fuel does not exceed a Reid Vapor Pressure (RVP) of 9.0 psi in the summertime volatility control season. Absent the waiver, however, this would likely entail moving to a more costly, lower RVP blendstock.

Under the current regulations, then, retailers are forced to change fuels or labeling during the summer fueling season. As a result, the Senators said, retailers often choose not to sell higher ethanol blends, such as E15, since they can only sell these products mid-September until May. The Consumer and Fuel Retailer Choice Act would thus allow retailers to sell E15 year round.

Comments

Trees

If one is looking to evidence that the EPA has been corrupted over the years, look to their blocking of E15 fuel sales. It would take quite a rationization of law for them to act as they did. This law will end the shenanagins.

Jeffgreen54

Drive electric and this whole issue goes away. Buy renewable energy and a great deal of ozone pollution, global warming solutions are taken care. Easy.

Brotherkenny4

Don't worry about pollution, it is just one measure in the final solution.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)