Also found in: Dictionary, Medical, Wikipedia.


fuel made from natural, renewable sources, such as new and used vegetable oils and animal fats, for use in a diesel enginediesel engine,
type of internal-combustion engine invented by the German engineer Rudolf Diesel and patented by him in 1892. Although his engine was designed to use coal dust as fuel, the diesel engine now burns fuel oil.
..... Click the link for more information.
. Biodiesel has physical properties very similar to petroleum-derived diesel fuel, but its emission properties are superior. Using biodiesel in a conventional diesel engine substantially reduces emissions of unburned hydrocarbons, carbon monoxide, sulfates, polycyclic aromatic hydrocarbons, nitrated polycyclic aromtic hydrocarbons, and particulate matter. Diesel blends containing up to 20% biodiesel can be used in nearly all diesel-powered equipment, and higher-level blends and pure biodiesel can be used in many engines with little or no modification. Lower-level blends are compatible with most storage and distribution equipment, but special handling is required for higher-level blends.

Biodiesel is made from oils or fats, which are hydrocarbons. Fresh soybean oil is most commonly used, although biodiesel can be made from mustard seed oil or waste vegetable oil (such as used oil from restaurant deep fryers). These hydrocarbons are filtered and mixed with an alcohol, such as methanol, and a catalyst (sodium hydroxide or potassium hydroxide), resulting in a chemical reaction whose major products are the biodiesel fuel and glycerolglycerol,
or 1,2,3-propanetriol
, CH2OHCHOHCH2OH, colorless, odorless, sweet-tasting, syrupy liquid. Glycerol is a trihydric alcohol. It melts at 17.
..... Click the link for more information.

Mentioned in ?
References in periodicals archive ?
Comprehensive data showing biodiesel capacities, production, consumption, trade statistics, and prices in the recent years are provided (globally, regionally and by country)
But the fuel didn't take off until 2004, when Congress passed a law offering a $1-a-gallon tax credit for biodiesel made from agricultural resources.
Retail biodiesel pumps can also be found under the "Buying Biodiesel" section of www.
In summertime, straight biodiesel can be burned safely and engine manufacturers guarantee their engines if the biodiesel used meets certain standards defined by the Association of Scientific, Technical and Medical Publishers.
However, Phillips adds that the biodiesel industry is working on methods to reduce NOX via an additive or catalyst.
The biodiesel must be neutralized with an acid and then purified of the basic catalyst's remains.
From a purely economic stand point, biodiesel may not seem attractive at its $2.
CORRECTION: Both motorists and the economy as a whole would truly benefit if biodiesel could be produced at slightly less cost than regular diesel fuel, but that, unfortunately, is not the case.
Researchers believe they could soon put their biodiesel on the market nationwide.
First-generation biodiesel has been used in national markets for some time, with fuel quality standards in place for this purpose.
will host the Biodiesel Finance and Investment Summit, an event designed to bring together leading project developers, investors, lenders, EPC contractors and others in the biodiesel finance and investment community to "share their perspectives on what it takes to get biodiesel sales successfully financed in 2006 and beyond," on February 27 and 28 at the Doubletree Guest Suites Times Square in New York, NY.
If you're thinking that a brave new world of agriculturally derived, clean-burning biodiesel fuel is going to wean us off petroleum, you'd better think again.