Danish researchers found that, if not more effective in improving the engine, then in the use of biodiesel made from rapeseed oil, the emissions caused by the use of regular diesel is likely to be more serious than that. Technical University of Denmark, the researchers report that they used a number of parameters to modify the engine testing to biodiesel made from rapeseed oil, the results of the combustion exhaust gas after carbon dioxide emission and the total level of carcinogens than the general high quality diesel out of 20%. Hayes participated in the study of Pell Schramm said the main reason leading to the above is part of bio-diesel engine "bodiless" in regular diesel engines, even if part of the work to modify its parameters, is made in the use of rapeseed oil bio-diesel, there will still be inadequate combustion phenomenon, resulting in poor emission targets. The study also found that if the use of chemical raw materials to the production of dimethyl ether fuel, just a little improvement on the diesel engine, the exhaust emission levels of pollutants than with ordinary high-quality diesel fuel will be even lower. Schramm believes that if the industry wants to continue development of the biodiesel made from rapeseed oil, we must substantially improve its support of the engine. In addition, the development of dimethyl ether as the main raw material is also an ideal vehicle fuel research and development direction.

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