A senior student named Oberlin in Ohio, USA, recently successfully used sodium hydroxide and methanol as catalysts to separate vegetable oils into glycerol and methyl esters. Methyl ester is biodiesel and can replace diesel-driven diesel engine cars. Oberlin used its own biodiesel as fuel to drive a 1984 Volkswagen Jetta for more than 3,000 miles, winning the first prize at local and state science fairs. A high school student's production of cheap fuel is something new, but the idea of ​​using vegetable oil as an engine fuel has long existed. In fact, when Rudolph. When Dizzel first exhibited his invention of a diesel engine at the 1900 Paris World Expo, he used peanut oil as fuel. Biodiesel is biodegradable, non-toxic, harmless to the environment, and can be extracted from renewable resources. The main benefits of biodiesel are: 1. Can be used in any diesel engine; 2. Among all alternative fuels, biodiesel has the highest unit of British heat (between diesel No. 1 and diesel No. 2); 3. Biodiesel has twice the ignition point of diesel, so it is extremely safe to use, handle, transport and store. 4. Biodiesel has the highest energy balance among all fuels. In the process of biodiesel production, 3.2 units of energy can be obtained for each unit of mineral energy consumed; 5. Of all alternative fuels, only biodiesel meets the requirements of health impact testing as defined by the US Clean Air Act. Testing showed that using biodiesel can reduce air toxicity by 90%. A study by a university in California, USA, showed that the use of biodiesel can reduce the cancer rate by 94% compared to the use of diesel. Since the beginning of the 1990s, the United States has begun to put biodiesel into commercial applications, but it has not really formed scale in the last two years. Biodiesel has become the fastest growing alternative to fuel in the country. In the United States, only three major automobile transport companies used biodiesel in 1999, and by March 2000, more than 40 transport companies used biodiesel. In the United States, biodiesel is mainly used for bus and truck transportation companies with centralized gas stations. The U.S. federal government is the largest user of biodiesel. The United States passed the Energy Policy Act of 1992 that the vast majority of federal, state, and public sector car teams must have a certain percentage of vehicles that use alternative fuels. In California, a truck transport company operating around the San Francisco area uses 100% biodiesel. The vast majority of transportation companies use 20% of biodiesel and 80% of diesel. However, biodiesel has not yet entered various gas stations because its price is 15% to 30% higher than that of petroleum-based diesel.
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