I ran across an interesting article in Popular Mechanics about some issues that pure biodiesel might have in some new diesel engines.
Dave Hubbard, who follows developments in biodiesel and even makes the green fuel himself, writes that changes in environmental laws have actually made formerly B100-compatible engines unable to burn the pure form of the biofuel:
Until two years ago, all diesel engines were B100-compatible (biodiesel cannot run in gasoline engines because it needs an engine that ignites by compression). Then standards set by both the Environment Protection Agency and California Air Resources Board, phased in for 2007, required all passenger vehicles to meet the same, stricter emissions. That meant diesel manufacturers had to reduce emissions of NOX and particulate matter to meet those of gas-powered cars. These standards were created with good intentions—to look out for our health by improving the air that we breath. (After all, particulate matter is a known carcinogen.) But the way most manufacturers did this created a setback for those of us trying to use biofuels.Read More


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Broin. “These POET plants work hard to ensure that safety remains a top priority.”
A biodiesel maker in Upstate New York has expanded its capacity to turn waste vegetable oil into the green fuel by five-fold.