The engine does not affect the environmental effects of biodiesel

Danish researchers found that if biodiesel made from rapeseed oil is not used for more effective engine improvement, the resulting emissions are likely to be more severe than those using regular diesel.

Researchers at the Technical University of Denmark reported that they tested biodiesel made from rapeseed oil with an engine modified with several parameters. As a result, the total level of carbon dioxide and carcinogens in the tail gas after combustion was higher than that of ordinary high-grade diesel. 20%.

Jessper Schramm, who participated in the study, pointed out that the main reason leading to the above results is that some of the engines that use biodiesel are currently "breasted" on conventional diesel engines. Even if some of their operating parameters are modified, they are made of rapeseed oil. In the case of biodiesel, insufficient combustion may still occur, resulting in poor emission indicators.

The study also found that if a fuel made from dimethyl ether, a chemical raw material, is used, only a slight improvement can be made to the diesel engine, and the pollutant level in the discharged exhaust gas will be lower than that of ordinary high-grade diesel.

Schramm believes that if the industry wishes to continue to develop biodiesel made from rapeseed oil, it must greatly improve its supporting engines. In addition, the development of vehicle fuels with dimethyl ether as the main raw material is also an ideal direction for research and development.