Tech Stuff

Ethanol Promises

Farm-raising our own energy independence: Could it happen?

You will be hosing ethanol into your gas tank. You will. It's the law.

The 551-page Energy Policy Act of 2005, signed last August, includes many sops to a blur of special interests, but one single provision rang the bell for automakers, greenies, and farmers, and for a broad coalition of ordinary motorists who were hoping for something, anything, to bring down gasoline prices; starting in 2006, the average gallon of "gas" will contain 2.78-percent ethanol.

Congress has made to the petroleum industry an offer it can't refuse. It's called a mandate.

And it's a mandate that keeps on giving, at least to the farm states, as it ratchets up the ethanol quota, nearly doubling it over the next six years - from 4.0-billion gallons in 2006 to 7.5-billion in 2012.

The idea is simple: Use ethanol as the gasoline equivalent of Hamburger Helper. The nation will stretch more miles out of every barrel we import from, as the President says, "unstable parts of the world." It's hardly the "energy independence" we've been promised for 30 years, but it's a baby step in that direction.

Or is it? We'll measure ethanol's benefits against the promises made for it down the page, but first, a few basics.

Unlike other alternative fuels, no vehicle modifications will be needed for the mandated ethanol content, which increases to about five percent by 2012. It should burn just fine in all the gasoline burners already on the road. Gasohol, a mixture of up to 10-percent ethanol with gasoline, has been in wide use in farm states for 30 years, and all new cars are engineered for this fuel.

Before we go further, one clarification: There's no requirement for every gallon of gas to contain ethanol. Instead, an annual ethanol quota must be met. So gasohol and E85 (85-percent ethanol, 15-percent gasoline) will still be sold where there's availability and demand, which reduces the amount of ethanol that must be mixed in elsewhere.

The intent here is to guarantee a market for ethanol. Now producers can invest in factories with confidence of a payback.

With a bare-faced mandate for ethanol in place, the previous sham, the oxygenate requirement, is hereby deleted. This was a scheme dating back to the carburetor era that mandated gasoline contain two-percent oxygen by weight, so as to trick the fuel system into serving up leaner mixtures. It applied in localities with air-quality problems according to the Environmental Protection Agency - parts of 14 states and the District of Columbia. MTBE (methyl tertiary butyl ether) was the first choice of oxygenates, but since it contributed to ground-water contamination, ethanol became the fallback. However, feedback-fuel-metering systems, which self-adjust to operate at a fixed mixture regardless of fuel composition, became the norm roughly 20 years ago. As a result, the benefits of the oxygenate rule have decreased as newer vehicles' fuel systems have replaced the older, more primitive ones. Today, as any engine engineer will testify, the rule has virtually no pollution benefit and has become nothing more than a backdoor mandate for the ethanol industry and corn farmers.

Now, with gasoline prices high and more people concerned about global warming, Congress has gotten brave enough to bring ethanol in the front door, in broad daylight, with mandates. Farm-raising our own energy independence is a seductive idea, better yet if it comes with a clean-burning fuel. But will it work? Let's examine the various promises for ethanol one by one, to see if it can deliver.