Biodiesels are primarily derived from many lipid monomers joined together by ester bonds to create polymers. As a result, biodiesels contain oxygen along the polymer chains, so no, they are not hydrocarbons.
Biodiesel is primarily composed of fatty acid methyl esters (FAME), which are derived from the transesterification of triglycerides found in vegetable oils or animal fats. The chemical structure of biodiesel consists of long hydrocarbon chains with a carboxylate group (–COO–) at one end, where the fatty acids are esterified with methanol. The exact structure can vary depending on the source of the feedstock, leading to a mixture of different ester molecules in the final biodiesel product. Overall, biodiesel is characterized by its hydrophobic hydrocarbon chains and ester functional groups.
Biodiesel
biodiesel = el biodiésel
Yes it is safe to mix petroleum diesel and biodiesel. Blends of biodiesel and petroleum diesel are designated "BX." Where "B" states that the fuel mixture is a biodiesel blend and "X" indicates the percentage of biodiesel in the blend. For example, common blends of biodiesel in North America include B2 (2% biodiesel), B5(5%), B20(20%), and B100(100%). B100 is also know as "neat," or pure, biodiesel.
Wikipedia provides an excellent encyclopedia style article on biodiesel fuel. Other websites that offer information about biodiesel fuel are the U.S. Department of Energy's Biodiesel page and the National Biodiesel Board's page.
Yes, you can buy a hybrid that uses biodiesel but they are much harder to come by than hybrids that don't use biodiesel or biodiesel cars that aren't hybrids.
the biodiesel should be used in the diesel engine, and there are some biodiesel motorbike has been produced such BWM http://www.doinggroup.com/
Biodiesel's weight is generally 7.34 lbs/gal.
Biodiesel
Just about any diesel vehicle will run on biodiesel.
The iodine value of biodiesel gives an indication of the degree of unsaturation in the fatty acid chains present in the biodiesel. It is typically lower for biodiesel derived from saturated fats or oils, and higher for biodiesel derived from unsaturated fats or oils. Knowing the iodine value can help assess the oxidative stability and cold flow properties of biodiesel.
You often only find biodiesel in the Midwest or areas where corn is a big market. Biodiesel is made out of corn and that's why. Biodiesel will make your diesel engine get better gas mileage just so you know.